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I've read so much gumpf online about what to do behind the stove - the only thing that seems tried and tested with pretty much zero chance of cracking is to use a lime render and a lime based top coat and to smooth it out.. or risk something like vitcas heat resistant plaster which is apparently an arse to work with and expensive... and not guaranteed!
I need to cover the area in the picture and about 30cm out sideways (you'll see a pen line) of plasterboard that still needs to come off.
Any plasterers got any lime mix ratio advice? Not sure I'll do it myself as I dont think I've got a neat enough hand but I might give it a shot as I could always knock it back off.
You will also need something for the lime to key into, eg alikline resistant mesh. lime putty : sharp sand 1:3 ratio. Don't add water.
Not a plaster, just did a like course and did some lime work on my house.
P.s paddle mixer. Lime mortar is a bigham fluid so it has a shear threshold before which it exhibits solid body rotation if you try and just stir it. The paddle mixer increases the shear and mixes the sand in well and allows you to see the true viscosity of it. Failing to see this is what causes people to add water
Actually are you thinking more dry lime? NCL 3 or 5 and not lime putty mix? Hydraulic lime?
This is what I've read online:
5:1:1 mix would work, sand:cement:lime for the render and finish coat with silver sand and lime putty 1 sand : 1.5 lime putty.
So I guess its not a "traditional" lime mix as they are suggesting using concrete in the render and I'm guessing the lime addition is just to make it slightly more flexible?
Speak to the guys at Natural Building Technologies - they will have a Buamit product I suspect, and if not will point you at someone who does. They will have a technical plaster person, who at worse will call Germany and check for you.
https://www.natural-building.co.uk/product-type/render-plaster/
Thanks mate!
ah they dont offer advice unless i use their woodfibre system! doh
That's a change since I was there....
OK, try Ty-Mawr then www.lime.org.uk