Collapsing concrete...
 

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Collapsing concrete / schools...

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 DT78
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what next ffs?  collapsing concrete shutting schools now, what about all the other building made with the stuff in the same period?  or was it a special school grade concrete???

hoping our kids aren't impacted as theirs is victorian era.


 
Posted : 31/08/2023 10:03 pm
susepic reacted
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hoping our kids aren’t impacted as theirs is victorian era.

Highly unlikely, they were all brick construction.


 
Posted : 31/08/2023 10:06 pm
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hoping our kids aren’t impacted as theirs is victorian era.

I am sure Jacob Rees Mogg is thinking the same.


 
Posted : 31/08/2023 10:07 pm
davros, only1mikey, joebristol and 3 people reacted
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Hospitals and other public buildings may have it too.
I read about it earlier this year in a ‘ticking time bomb’ style of article.
They’ve just said on the news that the government have been warned about this for a few years.

So that means we get a sudden, panicky reaction just before term starts.
Standard for this bunch of idiots in charge.


 
Posted : 31/08/2023 10:07 pm
jameso reacted
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hoping our kids aren’t impacted as theirs is victorian era

Do you think they'll finish the roof in time......


 
Posted : 31/08/2023 10:25 pm
 DT78
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dunno whether the roof will be finished....guys seemed to be all on their mobiles when I was up there on Tuesday....

do we really need to mess our kids around even more.

and if it was known for a long time I'm going to be even more grumpy.  if only there had been a time when we had to close alot of public services down, wouldn't that have been a great time for sorting out all this type of crap?!

no we will wait until it seems we have a gap in the whip parents into a panic cycle, just before the start of the new year would be ideal!


 
Posted : 31/08/2023 10:29 pm
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A known problem for years (decades). It always had a limited life and was known as such when used. A cheap and nasty short term material. Always was.

I was at a Red Brick Poly in the 1980s, and some of the non red brick parts were known to have this material and that it had a limited life back then.

But resolution (ie rebuilding schools, colleges, etc  PROPERLY) rather than patch up and tell LEAs and schools (who strangely have very few structural engineers in their midsts) to 'make sure they have mitigations in place' (FFS Acrojacks in classrooms holding the roofs up) has been kicked down the road repeatedly. Probably because none of the ministers kids are affected at Eaton or Harrow.

It's quite symbolic of how the country's 'social' services quite literally are falling apart. Oil and gas money from the last 40 years should have been used to build stuff like this properly, for the long term good of the nation.  Instead those national assets were flogged off on the cheap to fund short term tax cuts and line the wallets of the few.


 
Posted : 31/08/2023 10:40 pm
quirks, chrisdavids, nt80085 and 15 people reacted
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Hospitals and other public buildings may have it too.

Plus some private by all accounts. At least on the public side there seems to be some ability to check the history since the same people own it. On the private side though its not so clear cut.
As I understand it was popular since had low costs to the people paying for the build but had the downside it did come with a pretty short lifespan combined with unpredictable failures once that is hit.


 
Posted : 31/08/2023 10:41 pm
 aggs
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Most of our counties policies are short term and not long term or very long term.

So no planning. Just sticking plasters and promises.!  This looks like it will esculate!


 
Posted : 31/08/2023 10:44 pm
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The timing of the announcement, and leaving local government and schools to deal with it in just a few days… well…


 
Posted : 31/08/2023 10:48 pm
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I run a small surveying practice & I'm working on several RAAC replacement schemes for one client.

They had the foresight to commission surveys of all their buildings (hundreds) to identify which had RAAC roofs, and then risk assess their condition and prioritise their replacement programme.  The highest risk roofs had internal scaffolds and propping installed and were obviously at the top of the list for replacement.

It's a tough call for schools and hospitals as whilst most collapsed RAAC roofs are those that have suffered water ingress through poorly maintained flat roof coverings, some collapses have happened on roofs that had been inspected and showed no visible signs of failure (cracking, deflection, spalling, rust staining from corroded rebar etc).

Of course, for those that don't even know if they have RAAC roofs, or don't employ the right people to assess & advise them, then that's how they end up in the situation the schools are in now.


 
Posted : 31/08/2023 10:49 pm
mogrim and Murray reacted
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Feels like it's just the start of an avalanche of these tbh. One of the theatres my brother regularly works in closed earlier this year as it's mostly roofed with teh stuff, people keep asking when will it be fixed and the answer seems to be that it can't be.

Lots of people alledging costcuttign etc but it also seems to have been a signature material for some architects, kind of like with concrete in the 50s.


 
Posted : 01/09/2023 12:16 am
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It was a cheap 1950s/60s concrete product.


 
Posted : 01/09/2023 1:05 am
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if this has to come from existing school budgets, then the staffing, teaching, or food equation is even harder.


 
Posted : 01/09/2023 3:04 am
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Just after i left school i had a summer job at a concrete product factory (flooring mainly).
They regularly tested the concrete mixes, apparently the concrete increases in strength over some year then at 20yrs the strength drops off a cliff.

They also had a waste water pool that was so alkali they had to add quite strong acid to nutralise it.


 
Posted : 01/09/2023 6:16 am
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I've been keeping half an eye out for it at work. We have ex-government buildings in all towns in the UK, a lot of which are 60s prefab and maintenance is now on a shoestring.  We have countless buildings with bad leaks and buckets scattered around and we also tend to cut holes in intermediate floors which it seems is one of the red flags.

@Marin_Maketh_The_Man

Is RAAC always smooth finish? I assume exposed aggregate panels are traditional concrete as otherwise there would be no aggregate to leave as a finish.


 
Posted : 01/09/2023 6:16 am
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The utter incompetence of everyone involved in this shit show is staggering.


 
Posted : 01/09/2023 6:26 am
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 tomd
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It was a cheap 1950s/60s concrete product.

Absolutely - and when it got used the brief was probably 25 year life for minimum upfront cost

Also not really worth celebrating Victorian construction - there's a huge element of survivor bias this. All the rotten stuff fell down and we're left with the good stuff.


 
Posted : 01/09/2023 6:42 am
mogrim, hightensionline, Riksbar and 2 people reacted
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We've known about the hospitals for a while - was joking last night that maybe it was a special public services concrete. Maybe the private sector has enough funding for proper building maintenance.

For perspective, no one has been killed by this - yet.

Which Tory minister bought shares in mobile classrooms over the summer.....


 
Posted : 01/09/2023 6:51 am
 Spin
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The utter incompetence of everyone involved in this shit show is staggering.

I'm not sure that's entirely fair. There are several schools in my local authority that have it including the one I work in. It's been known about for years, they have a rolling inspection programme and its one of the factors considered when deciding which schools are the priority for new builds.


 
Posted : 01/09/2023 7:14 am
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Autoclave bricks have been on the go for years, I remember the unusual steam smell at a brick factory 45 years ago and they weren't rice crispie/aero lightweight thermo light/durox blocks used in many houses

Autoclaves now used to clean the tartar and blood off the the dentist drill but slightly smaller


 
Posted : 01/09/2023 7:27 am
 DT78
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I mean it's a massive cock up, but why are they not naming the schools that are impacted?  it's almost like they want to panic every parent in the country when it's *only* 100 schools that could collapse and kill your kids...

as for short termism, these days it seems it's lucky if a minister is in a position for a year.  let alone have a scooby about what the position is they are supposed to be covering


 
Posted : 01/09/2023 7:46 am
kelvin reacted
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I mean it’s a massive cock up, but why are they not naming the schools that are impacted? it’s almost like they want to panic every parent in the country when it’s *only* 100 schools that could collapse and kill your kids…

This way sells more media, papers, click throughs etc which is great when all your pals work in mainstream media.


 
Posted : 01/09/2023 8:04 am
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Of course, for those that don’t even know if they have RAAC roofs, or don’t employ the right people to assess & advise them, then that’s how they end up in the situation the schools are in now.

This. I was a school site manager and frequently came across poor decisions from the LA surveyors and architects, who had lots of qualifications but little experience and would cheerfully take a % of a build to fund their department.

They would only employ the larger firms for bigger builds and wouldn't consider common-sense smaller builders. This a LA problem and one that successive generations of managers have been sitting on

As far as Victorian schools are concerned the major problems will probably be asbestos, which will be well-surveyed and controlled. We also had lath and plaster ceilings with rusted nails, which were "over-boarded" with wire mesh to hold everything in and modern much-lowered ceilings. These were better for heating and lighting


 
Posted : 01/09/2023 8:13 am
Murray reacted
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Hospitals and other public buildings may have it too.

I think you’ll find that’s do have it. I have sat in many meetings about this.

I think it was a collapse at Kings Lynn hospital that brought RAAC into focus.


 
Posted : 01/09/2023 8:15 am
kelvin reacted
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it’s *only* 100 schools that could collapse and kill your kids…

Correction, they have identified schools that could collapse


 
Posted : 01/09/2023 8:15 am
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They would only employ the larger firms for bigger builds and wouldn’t consider common-sense smaller builders.

There are a lot of good reasons for that though, from having sufficient financials to see a large project out, suitable insurances, a large enough credit facility with suppliers, sufficient management teams etc. The smaller the firm often the more exposed they can be to one large project going wrong and pulling them under, which doesn't work well for them or the client.

Many smaller and medium firms will have these, but finding enough that are interested to make up a wide enough base of tenderers is hard as many tend to stick to what they know. Plus the largest contractors tend to have expert bid teams who know exactly how to nail the qualitative aspect to a bid etc.

Not saying it can't happen as I used to work for an SME contractor and we occasionally took on some pretty big builds, but it wasn't our strength or comfort zone.


 
Posted : 01/09/2023 8:23 am
kelvin reacted
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Not saying it can’t happen as I used to work for an SME contractor and we occasionally took on some pretty big builds, but it wasn’t our strength or comfort zone.

I should qualify that and you're right, but even a modest extension to the staffroom was considered "too much". If the architect had to draw something then it had to be a bigger company

Local contractors were allowed to repair/replace existing infrastructure, such as steps, fire doors, etc


 
Posted : 01/09/2023 8:35 am
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This isn't the case, but even if it were, perhaps they should do their job and speed up the processing of asylum claims.

Oh wait, then they wouldn't have anything with which to rile up their voter base of credulous idiots.

This fiasco is just another example of them ignoring real issues while spending all their time dishing up culture war bollocks for morons. They have had at least FIVE YEARS to sort this out.


 
Posted : 01/09/2023 8:37 am
robertajobb and kelvin reacted
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WTF is this thread about?

Any links to shed some light on what it is?


 
Posted : 01/09/2023 9:21 am
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At least on the public side there seems to be some ability to check the history since the same people own it.

I've been searching for this stuff all summer* on behalf of a local council. They have zero information and records of their buildings.

Highlights include going to survey a builing and being told by the bemused current owners that they bought it from the council in 2016; and a structure which had no roof at all being on the "can you check this" list.

*neither I nor any of my colleagues have found any, BTW, so the media have latched on to a few cases and blown it out of all proportion.


 
Posted : 01/09/2023 9:22 am
Murray reacted
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Here’s a piece from Loughborough Uni about it
https://www.lboro.ac.uk/news-events/news/2023/march/reinforced-autoclaved-aerated–concrete-raac/

Thanks Frank but since been removed interestingly!


 
Posted : 01/09/2023 9:24 am
 Ewan
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As far as I can make out it's aircrete (i.e. like the thermalite blocks they build the inner skin of houses out of) with reinforcing bar in the middle to make a type of reinforced concrete. This has been used as planks for roofs (with longish spans) in public buildings constructed up to late 70s. The reinforcement has debonded/corroded/can't do it's job and this in addition to water ingress weakening the aircrete.

Apparently the thermalite blocks that hold up half the houses in the UK are fine as they're not used as planks and are just blocks in compression without rebar in them.


 
Posted : 01/09/2023 9:35 am
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Once again the governments policy seems to have been ‘let’s cross our fingers, hope for the best and maybe if we’re lucky no children will die’


 
Posted : 01/09/2023 9:38 am
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dan - that's odd; could be coincidence...


 
Posted : 01/09/2023 9:38 am
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The Pantheon seems to be holding up OK.


 
Posted : 01/09/2023 9:43 am
davidr reacted
 mert
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The concrete bits of my old school were collapsing in the 80's. The late 70's build brick stuff was collapsing in the late 90's. Pretty much the whole school was pulled down in the 00s and rebuilt from the ground up.

The only bit that was still functional (and took a lot of tearing down) was the original bit that was built around the turn of the last century. The original "school" opened in the 1890's IIRC. Only problems with that bit of the site were the asbestos and the heating bill...

Then i went to uni, the entire engineering and textiles block was already due for demolition (1960's build) and some of the facilities on the lower floors had their walls tied together with steel bars, and the ceilings supported with acro props/jacks. They were still all there when i graduated. And they were still there when i went to a classmates wedding in 2000.


 
Posted : 01/09/2023 9:44 am
stumpyjon reacted
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Interview on R4, seems that there was a known problem they were acting on under advice but they thought only certain types / situations presented a risk (where there was other damage, maybe water ingress AIUI)

https://schoolsweek.co.uk/raac-100-schools-at-risk-of-collapse-ordered-to-close/

Then recent info (some as late as last week) has indicated that's incorrect and so those where there was RAAC but where previously thought to be no / low risk now needs acting on.

I'm no fan of the Gov, and it's easy in hindsight to say they should have gone better safe than sorry, but I'm finding it hard to criticise too much the fact that now it's come to light they are taking steps. Leaving the kids in these classrooms and keeping fingers crossed is hardly a viable alternative. As the interviewee said, it's irrelevant of when this came to light, it has come to light and they need to act - if it had come to light in November they'd do the same and shut classrooms and send kids home while they work out what next.

Yes, argue all you like on funding vs austerity, and whether different decisions should have been made in the past but look at the facts and play the ball, not the man.

if this has to come from existing school budgets, then the staffing, teaching, or food equation is even harder.

Minister said repairs would come from central funds. Of course unless they start following rone's advice, means cuts elsewhere, so may in the end circle back to schools budgets anyway.....


 
Posted : 01/09/2023 9:46 am
 poly
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WTF is this thread about?

Any links to shed some light on what it is?

Between about 1950 and 1990 we built large building roofs using a type of concrete that is essentially like a meringue.  They material was quick and cheap to put in, but had a limited life.  We've reached the end of that life and it can fail with little or no warning bringing a concrete roof down on the occupants.  Schools were exactly the sort of buildings where this was used.  The industry and government have known about this for a good few years, and been getting increasingly anxious about it.  English schools start going back next week so the government announced that over 100 schools have dangerous roofs and probably won't open as normal.  To maximise panic they haven't named the schools (but each local authority knows which are their dodgy ones - I assume this is a sneaky move - DFE says "needs mitigation measures" not "school closed" and therefore budget and problem is shifted to the local authority!.

Major UK news story ( https://www.bbc.co.uk/news/live/uk-66461879).   Ridiculous timing.  Assume there is something being buried whilst this happens OR they've had grenfell type warnings, ignored them and then some head teachers have come back and said "eh the roof appears to be in the gymn hall".  Perhaps its a negotiating tactic with teachers union - you can have 5% and a hard hat.

Can’t afford to spend millions every day feeding and housing illegal immigrants AND repair school buildings.

We could turn them into legal migrants and employ them to help sort the problem.  Then they'd by paying taxes, responsible for housing themselves etc.  >90% of them will be allowed to stay in the end anyway.


 
Posted : 01/09/2023 9:48 am
oldnpastit and kelvin reacted
 mert
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The industry and government have known about this for a good few years

Decades, not years.


 
Posted : 01/09/2023 9:52 am
kelvin reacted
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No doubt the government will launch a scheme whereby  their friends and families can set up makeshift companies to supply emergency equipment to hold up the roofs.


 
Posted : 01/09/2023 10:03 am
footflaps, kelvin, dissonance and 1 people reacted
 csb
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'No safe spaces to learn' - back to school in Ukraine"

Oh the irony of this BBC headline today.


 
Posted : 01/09/2023 10:20 am
martinhutch and kelvin reacted
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Are these roof panels still being made and installed? If yes, is the stuff being made today any better for longevity?


 
Posted : 01/09/2023 10:23 am
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No doubt the government will launch a scheme whereby their friends and families can set up makeshift companies to supply emergency equipment to hold up the roofs.

Michelle Mone has already set up a company offering underwiring services to help push up concrete roofs.


 
Posted : 01/09/2023 10:31 am
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Mods/tech - can you please sort the problem which is preventing the Loughbirough Uni link from opening; see timba's post ^^^ which refers to my post of late yesterday.
Ta.


 
Posted : 01/09/2023 10:31 am
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If you follow the Loogabarooga link and get to their “page not found”, just click on “news and events” and search for “aerated”. It will be the first article. Spoiler - it won’t tell you much more than others you have read already.


 
Posted : 01/09/2023 10:35 am
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My daughter's secondary school has/had this problem - was highlighted by a structural engineer when she was their as being an urgent closure of the building (main teaching block). Her school had been on the waiting list for replacement of the building/s for around 10-15 yrs.

The building has now been demolished (this summer) and is being replaced, luckily for my daughter all the building work started after her GCSEs.....


 
Posted : 01/09/2023 10:39 am
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I wonder who scrapped the school building/refurbishment programme back in 2010?

https://www.theguardian.com/education/2010/jul/05/school-building-programme-budget-cuts


 
Posted : 01/09/2023 10:42 am
footflaps and kelvin reacted
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midlife - not used since mid 90's, apparently.

Bridget Phillipson, Lab shadow education secretary, has asked c150 parliamentary questions about use of and concerns about RAAC in past 2 years - according to one of her colleagues.

Where's little rish! with one of his platitudes to provide some reassurance?

I thought nick gibb was an embarassment - more than usual - on R4 this morning; evasive, repetitive and continually attempting but failing to talk over Nick Robinson and drown out his questions.
One of his pointless statements was that '...every affected school will get a case worker'.
How 'kin useless - every affected school needs immediate access to a suitably qualified and experienced surveyor. I doubt many LAs have the right skills set in house.

How robust and thorough is the current building management process in state schools?


 
Posted : 01/09/2023 10:47 am
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The timing of the announcement, and leaving local government and schools to deal with it in just a few days… well…

Std Tory approach isn't it, cause chaos and make life difficult for people then divert blame, line the pockets of supporters and themselves while the people are distracted or those who actually GAS are trying to do the right thing.


 
Posted : 01/09/2023 10:47 am
kelvin reacted
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Absolutely – and when it got used the brief was probably 25 year life for minimum upfront cost

Also not really worth celebrating Victorian construction – there’s a huge element of survivor bias this. All the rotten stuff fell down and we’re left with the good stuff.

I think in a sense between those two eras theres a shift in philosophy as well as technology  in terms of building. It's amazing how many victorian buildings have the name of the occupying company or organisation that built them carved into the fabric of the building. You even see plenty of houses with the initials of the first occupants on the lintels There was a sense at the time that you built both businesses and buildings for future generations ( ..... & Sons). But building technology of the time was also maintainable - needed to be maintained, often quite a lot, but was maintainable.

We seemed to enter an era where we begrudged maintenance - and I don't know if the idea of building technologies with finite serviceable lifespans comes from the loss of that optimism and sense of legacy that preceded it of from a simple hatred of maintenance. Maybe people felt like they'd been saddled with the duty of maintenance imposed by our optimistic forefathers A decent victorian building can last for ever, in the same way as Trigger's broom does - but it will always need fixing.

These clients want and specify low and no maintenance solutions - but they are also for most part products and materials that are unrepairable and unrefinishable. Clients seem to  place more importance on their short term convenience than  long term prospects.

'25 years' seems to be the sweet spot because everyone involved in the decision will be retired by then, in fact the senior decision makers will probably feel quite confident they'll be dead by then.

Barratt couldn't sell houses on the understanding  that they'd  need demotion in 25 years time on that basis - becuase.... '& Sons' - people see their own property as  part of their legacy. But at work and in government its an idea we've become very comfortable with.


 
Posted : 01/09/2023 11:08 am
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 mos
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I work in offsite/modular construction & the number of enquiries we've had over the last few months has been mind blowing. Just yesterday, an LA contacted us asking for 30 classrooms to be up & running in 6 weeks. Not really what we're set up for so it won't really be work that we get involved with in the short term as we're already busy with other stuff.

Some of the big players in our industry with large hire fleets will be making a tidy penny by being there to 'support' the government, a bit like Sunbelt did during Covid.

https://www.amazon.co.uk/Disaster-Capitalism-Making-Killing-Catastrophe/dp/1784781150


 
Posted : 01/09/2023 11:16 am
kelvin reacted
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I'm sure portakabin-hirers who are coincidentally Conservative Party donors will be enjoying life right now.


 
Posted : 01/09/2023 11:20 am
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Many one here will enjoy blaming the current gov for this while ignoring the facts that this is an inherited problem with many of these buildings being built under labour governments.


 
Posted : 01/09/2023 12:02 pm
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with many of these buildings being built under labour governments.

Well given the technology was in use for decades its statistically quite probable that a quantity would have been built during any goverment's term.

It's not a mistake to build with finite lifespan materials if everyone involved in the descision agrees to it. But it is a mistake not to acknowledge that the end of those lifespans are approaching and its time to do something about it. 100 schools is a lot when you wait til roofs start caving in a to address the problem - and address it by having no apparent plan - but its 0.5% of the country's 20,000 school buildings across over 150 education authorities that are at risk less than one school per district - it doesnt, in the grand scheme of things, need to be a big deal. A government of any stripe that hadn't spend the last five years slipping around its own shit might have managed to rise to the fairly modest task.  Labour built over 100 new secondary schools between 2009-2012 without there being any kind of emergency to address. Maybe if they hadn't there'd be more schools on that list today.  Johnson promised to build 'a dozen' new schools in 2019 .... and then quietly didn't build any of them.


 
Posted : 01/09/2023 12:23 pm
silvine, Ambrose, steveb and 6 people reacted
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Many one here will enjoy blaming the current gov for this while ignoring the facts that this is an inherited problem with many of these buildings being built under labour governments.

Did you miss this link above?

13 years ago:

Michael Gove today cancelled Labour's school building programme, suspending projects for 715 new schools as part of the coalition's latest tranche of spending cuts


 
Posted : 01/09/2023 12:40 pm
silvine, Ambrose, csb and 4 people reacted
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good ol' tories sticking by their "we know the cost of everything but the value of nothing" mantra to the last.


 
Posted : 01/09/2023 12:53 pm
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hey regularly tested the concrete mixes, apparently the concrete increases in strength over some year then at 20yrs

Friend of mine worked in the labs for a concrete producer. He had to go on site when deliveries were made to take samples when loads were poured from the lorry. These were stored for testing/ if there were potential claims.

The mix was made to specific standards depending on the purpose so the samples (if made correctly) will match that. However, in 99 cases out of 100, the guys on site would add water once the mix was poured to make it easier to move & smooth but weakening the mix. A bunch of navvies weren’t going to listen to a spotty lab tech so he gave up arguing & eventually left the company.


 
Posted : 01/09/2023 1:01 pm
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Anyone know the actual design life of RAAC?
Building mag say 30 years but I've also seen references to 40 and 50 years.
Assuming 40 years, every panel installed before 1980 would now be beyond it's design life.
That doesn't mean the panels will fail but what %age have been inspected with the findings documented, replacement costs calculated and follow-up inspections carried out?
Could be a busy - and lucrative - time for structural engineers and chartered (proper) surveyors.


 
Posted : 01/09/2023 3:14 pm
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The list is continuing to grow as some schools haven’t been tested yet.

Quote for renting Portacabins until next September for a small secondary with no sixth form is currently £1million. And they won’t have any heating in or teaching aids. The DfE are saying they won’t fund this either.


 
Posted : 01/09/2023 3:40 pm
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Who would have thought that long term failure to invest or maintain infrastructure would be a ticking time bomb?

The voting public don't like tax bills though so it's hardly  a supprising strategy from both Labour and the conservative parties.


 
Posted : 01/09/2023 3:46 pm
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@frankconway AIUI it’s OK as long as it’s left in the preformed concrete ‘planks’ it was made in.

When you eg. cut it to length, drill holes in it or leave it somewhere it’s persistently wet, that’s when the fun starts.

Also helps if you don’t put a massive air conditioning unit on the top of a RAAC ceiling as then you end up with an acroprop in the middle of your workspace holding the ceiling it’s sat on up.

There’s some HMG target to have all NHS RAAC replaced by 2030. Which given that we’re still using some Victorian workhouse buildings seems a tad optimistic.


 
Posted : 01/09/2023 4:11 pm
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...Once again the governments policy seems to have been ‘let’s cross our fingers, hope for the best and maybe if we’re lucky no TORY MP or party donors children will die’

Fixed that for ya.


 
Posted : 01/09/2023 4:11 pm
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frankconway
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It was a cheap 1950s/60s concrete product.

Yah, but what I mean is it wasn't always chosen just for cheapness. Or it was, but with good reasoning, a lot of stuff was designed to go up faster and be cheaper but be replaced and to be either cost-effective that way over their lifespan, or to offer other shirter tern advantages that made it worth taking the later hit, like being able to build X hospitals in Y years instead of X/2 hospitals in 2Y years. Sometimes it really does make sense to do it fast and cheap and badly, you just need to have plans in place for the aftereffects, to record it properly and plan forwards. Which really has happened in some cases, and that just highlights how wrong it's been done elsewhere.

In the case of my brother's building the architect was using it basically as a super-material to make the shapes in his head that he couldn't do with other materials. It wasn't chosen just to be cheap, they've still got some of the paperwork and it was chosen because it was cool essentially, and could deliver stuff that other bids weren't offering, with longer term problems noted and almost understood. Unfortunately while it was supposed to be extendable/rebuildable it's turned out not to be in practice. Whether through a lack of understanding of how it'd age, or overoptimism, or just a failure of design I don't know. It's just such a bad sign that it stands out from others because it actually had some forward planning and awareness- it's noteworthy because it hasn't worked out, not because it wasn't planned for.

Sort of the equivalent of hi-rises etc, for all that a lot were just built to be cheap and crap, there were always those people who really believed in the dream. Or visionary brutalist architecture vs "concrete boxes are cheap and easy". Or the way prefab buildings are seen so negatively here because of the historic use rather than the actual potential. In a bunch of these cases teh material isn't really the problem, it's the inability to plan over decades.


 
Posted : 01/09/2023 4:55 pm
 poly
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OR they’ve had grenfell type warnings, ignored them and then some head teachers have come back and said “eh the roof appears to be in the gymn hall”.

So its seems my wild speculation was about right.  Politicians unable to imagine risk until they've seen a failure for themselves!  https://www.bbc.co.uk/news/live/uk-66461879?ns_mchannel=social&ns_source=twitter&ns_campaign=bbc_live&ns_linkname=64f1ce30b994ec6acab229fc%26RAAC%20failures%20over%20the%20summer%20urged%20ministers%20to%20act%262023-09-01T11%3A50%3A58.480Z&ns_fee=0&pinned_post_locator=urn:asset:1d42c11b-d214-4717-bb59-9a832b3a3364&pinned_post_asset_id=64f1ce30b994ec6acab229fc&pinned_post_type=share


 
Posted : 01/09/2023 5:01 pm
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@ratherbeintobago - thanks for that.
My undestanding is that RAAC is both permeable and porous so it's weather/moisture resistance is dependant on it's coating and that surface treatment remaining intact.
@northwind - point taken; what's been lacking, IMO, has been and still is a robust inspection/maintenance regime and a fully costed replacement programme.

As an aside, my grandson starts school next week - in a solid, victorian building.


 
Posted : 01/09/2023 5:35 pm
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Dodgy reinforced concrete from the 1960's and 1970's? Pfffft.

Wait until you see how the PFI 'they only need to last 25 years of contract' schools and hospitals look when they are 26 or more years in and being sold back to the taxpayer to pick up any liabilities....


 
Posted : 01/09/2023 5:45 pm
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Hasn’t that already happened with some school walls that fell down? ISTR that was in Scotland.


 
Posted : 01/09/2023 6:33 pm
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Yes it has - and I've been involved in some work around outdoor areas that flood and similar. There's another scandal coming - not least because as the building near the end of thier design life they are too be handed back or sold(!) to the council's that have leased them for 25 years.

Most days I cycle past the multi millionaire house who owns a few of the PFI schools in Scotland, he often waves from his Bentayga or DB12...


 
Posted : 01/09/2023 6:53 pm
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@frankconway Bearing in mind I am a clinician rather than anything else, the estates guys in the meetings were pretty clear that RAAC planks that hadn't been cut to length or drilled were probably fine, which would fit with what you said about the coating being intact. The issue is that a lot of it isn't, often because it's got e.g. suspended ceiling bolts drilled into it.


 
Posted : 01/09/2023 6:59 pm
 Spin
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Anyone got any insight into what kids playing football against RAAC panels does to them? Asking for a friend...


 
Posted : 01/09/2023 7:33 pm
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In a previous life I worked for one of Europe's largest suppliers of building materials, including RAAC blocks.

https://tarmac.com/products/blocks/durox-supabloc/

And

https://www.xella.co.uk/en_GB/Ytong-modular-panel-system

As you can see by the 2nd link, these aren't just block, they're entire buildings.

But, one issue that was always mentioned in regard to the UK was the crap material handling on site - which is why concrete prefab houses had such a bad press.  Basically they got damaged onsite and/or during construction - less automation and rare for cranes to be used compared to the rest of Europe.  I wonder if it's the same with these 'roofs', plus poor maintenance schedules (for the last 13 years especially)?


 
Posted : 01/09/2023 7:37 pm
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Interesting that there were failures of RAAC back as far as the 1980s where units made in the 1960s had failed......

Standing Comittee on Structural Safety report here:


 
Posted : 01/09/2023 9:19 pm
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wonder if this would have been an issue if it was mandatory for all mps to send their children to state schools ?


 
Posted : 03/09/2023 4:36 pm
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Went for a ride yesterday with a civil engineer friend who's been involved in surveying this for years.

His opinion was that it's that ever-present issue in our infrastructure that the design lives have been exceeded massively and people only pay attention when it fails. Many of these buildings were built in the 1970/1980's with a contracted 20-30 year design life, and when that came up there wasn't the money to replace it so it was concessed for decade(s) until a number of recent failures. Not an issue with the material or the original designers really, it's been pushed way past its life. At the time it was cheap, easy to work with, and lightweight. The latter is apparently an issue in replacement work as most modern solutions are heavier and require replacement of foundations etc to support.

So yeah, despite Jeremy Hunt's claims to throw money at the problem now, it's purely a reactionary measure for an issue that's been known about for years.


 
Posted : 03/09/2023 4:44 pm
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Is it clear that the funding for repair/replacement is 'net new money' or a full/partial reallocation from existing funding commitments?
I suspect the latter, unfortunately.


 
Posted : 03/09/2023 5:59 pm
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Yes, argue all you like on funding vs austerity, and whether different decisions should have been made in the past but look at the facts and play the ball, not the man.

It's the same bloody men that cut funding and gave us austerity! Nothing's changed or been fixed.


 
Posted : 03/09/2023 6:18 pm
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I agree, now more facts have come to light. My point then, based on the R4 Interview, was that they 'thought' undamaged RAAC panels were OK and then 'found out over the summer' that wasn't the case and so had taken action. On that basis the right thing to do.

Now appears that they knew there was a problem already, and had been ignoring. The ballgame changed with that.

https://www.theguardian.com/commentisfree/2023/sep/02/observer-view-on-school-closures-warnings-over-concrete-years-ago

On the plus side, Mike Graham's got an allotment full of replacement.

https://metro.co.uk/2021/10/26/presenter-stops-insulate-britain-interview-after-claiming-you-can-grow-concrete-15488485/


 
Posted : 03/09/2023 6:25 pm
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so it seems "spend whatever it takes" means what ever you have left in your budget :/


 
Posted : 03/09/2023 9:05 pm
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