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This summer's project is to get the garage floor into a reasonable state. It was built in the late 1960s and whilst basically sound it's messy - top surface a bit broken up, not level, marginally lower than the entrance so gets wet in heavy rain.
I'm thinking of using this to level it and raise it by about 5mm.
What should I do at the entrance? There's an existing rubber threshold strip like this - should I just let the compound run up to that, replace it with something else or a wooden edge strip?
Are you planning to then cover it with something else? Self leveling compound is not designed to be a finished surface. That might dictate what you use as a threshold. If you just want to level it without an additional floor covering then I'd look at a bonded screed
The self leveller will crack at a rubber threshold strip, I’d put something else in if possible.
Also consider putting in threshold drains if you have somewhere for it to drain to
https://www.toolstation.com/drain-channel-grating/p95866
@nicjjb, I wasn't planning on doing so, will look at bonded screed. What threshold would I need for that?
@colp, I've got threshold drains, water ingress is only really a problem in heavy rain when they're overwhelmed.
Have seen some self levellers that claim to be suitable as a wear surface. Eg https://www.wickes.co.uk/Setcrete-High-Performance-Floor-Levelling-Compound---20kg/p/154134
Thanks Goldfish24, good that Wickes deliver too!
Ahhh - doing the same.
My garage is outside (detached) sits on an old concrete slab that has subsided a bit. Water seems to absorb into it when it drains despite it being buily up about a foot above ground level. There are a few cracks and its in poor condition.
Would this stuff work in that situation or do i need something more like a genuine concrete / cement mix?
Garage now done, with wood strips at the threshold that butt up against the closed door. Remarkably easy to do (compared with emptying the garage). I did it in two halves with another wood divider down the middle. I was 2 bags short for the first half, so have a bit of an uneven pour as I had to wait until Wickes opened the following day. Lesson learned, I over ordered, paid for delivery and then returned the unused bags for a refund. I also did the first half with a mixing paddle in my mains drill. For the second half I bought a cheap Screwfix paddle mixer - so much easier. I'll try and sell it on or donate to the local tool charity.
Overall, I'm really happy, the surface looks great - thanks @goldfish24 for the Setcrete recommendation
Thanks for reporting back! I hope it works well in the long run.
I’ve just been doing my new workshop/studio attached to my garage with the Mapei self-levelling compound - it is 2m wide x 6 metres. According to Mapei, I should have only needed 2 bags for 3mm average thickness - but I found that pretty optimistic and fortunately I went for 3 and even then it wasn’t that deep in places. Although I’ve using some foam rubber flooring, the finished surface is pretty solid and firm wearing. I too used a mixer on a power drill and if doing a lot using a drill with a low speed setting or borrowing/hiring a mixer would be a better idea.
I used 8+9 bags for a double garage, the surface was quite pitted (pebbles worked free from 1960s concrete) so I guess the depth was 5-10 mms depending on the pitting.