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Fixing indian stone slabs to thermalite block?
What is the best way to fix indian stone slabs to a thermalite block wall, wall is under 1m high
If it's with adhesive then what is the best sealant to seal the block and what is the best flexible adhesive?
4 Answers from MyBuilder Bricklayers
Best Answer
Is this an internal or external wall?
If it’s internal you could use plasterboard adhesive.
Answered 22nd Jul 2019
You can stick the sandstone to blockwork using o.p.c and a p.v.a additive or with a strong outdoor tile adhesive, no need to seal blockwork.
Answered 22nd Jul 2019
No sealant needed
Just loads of exterior tile adhesive as they come different thickness ‘s
and make sure the slabs are thoroughly soaked because this product is prone to “popping”
Answered 23rd Jul 2019
If outside , I would tight coat the thermalite with a 6;1;1 washed sand cement lime scratched render ,then sbr adhesive in a ratio of 20% to 80 % water painted on surface. Leave to dry
Recoated as work proceeds , and use a recommended exterior tile adhesive,grout .Then seal with a grangers waterproof sealant.consult a tile supplier for advise on tile adhesive and grout.
Answered 26th Jul 2019
