M
Mike
grout is not waterproof. if the floor is going to get wet, i.e a wet room then you should tank the wet area before tiling
View all of the UK tiling forum threads, questions and discussions here.
Just to throw something into the mix, quite a few rubber crumb (liquid and powder 2 part) manufacturers state that their products can go straight to green chipboard providing there's no deflection. Done quite a bit of site work where was 2PF was specced straight onto chipboard and there's never been a single failure with any of the floors. Personally I'd overboard it on a private job though.
Called BAL Technical. To summarise what they said...
- Don't prime surface (just ensure there is no wax coating by sanding down)
- Adhesive: Single Part Fastfelx
- Grout: Wide Joint + GT1. additive.
Also said that on such a small floor the movement or deflection should be at a bare minimum.
So, there you have. Thanks again for all your advice!
the advice given on this site is sound. bal have products that go against British standards, learned and practised by many tilers on here. They have a product that they claim can go straight onto tongue and groove boards, but i dont think that you would get many tilers on here that would do/trust it tho. so it is entirely up to you. The advice from the pros is to overboard. take it or leave it.
if there is no room for over boarding then imo would be a good idea to get something in writing from bal, stating the installation method required to meet there 25 year guarantee. thus covering your back if anything did go wrong in future. be aware, what ever they say do, as they are very good at testing if correct procedures have been followed voiding the guarantee.