Tiling on thermolite blocks

[James Langdon]

Was planning to batten and use backer boards on a new thermolite block wall for a shower. Buthaven't left myself enough room to fit the tray and door and so want to know if I can tile direct onto the blocks, which are level, or screw ply or equivalent direct to the wall and tile on that. I understand backer boards require a timber / steel frame. What is the best way to prepare / seal / waterproof the blocks if I tile direct? I'm only talking about an area of 1.6sq m and so don't want to buy a shed load of gear for that small area so any recommendations for small quantity products? Cheers!

[robbbin]

Weber have addy for straight on blockwork very good stuff its flexi as well, no need to prime blocks either

[grumpygrouter]

I don't think thermalite blocks are the best things to screw into anyway as they can have a tendancy to crumble if the correct plugs are not used.

[FreeD]

Use these into concrete block

Multi-Monti T-Star Countersunk 6 x 50m Pack of 50 - Screwfix.com, Where the Trade Buys

no need for plugs

[grumpygrouter]

I suspect that they are not suitable for Thermalite FreeD.

Check this out Fixings - Thermal Block Fixings - Plasplugs

[whitebeam]

Would'nt put tiles onto thermolite, you can get to much movement which increases the chance of cracking

[doug boardley]

why not dot and dab 12mm plasterboard onto blockwork?

[Dave]

why not dot and dab 12mm plasterboard onto blockwork?

Just as i thought........a lot quicker and better than battens.....

[cornish_crofter]

You can also get a product called Dry Fix. It's made by the same company that make Pink Grip. I've not used it myself but you're supposed to plaster the plasterboard in an hour.

Pinkgrip Dry Fix Drywall Adhesive 750ml x 12 + Free Applicator Gun

If you go for this you may only lose around 1/2".

Alternitively there are 'nails' for thermalite block.

Thor Helical - Thor Helical Nails

[James Langdon]

Some great advice - thinking I'll go for the dot and dab plasterboard option (possibly using the alternative fixing method) on the blocks plus plasterboard on the other two studded walls and then tank the lot. Sound good?

[doug boardley]

sounds good to me james