Insulated tile backer boards and thermalite wall

[tommyleestaples]

Hi all,

 

I had an extension done and one of the walls in the en-suite is thermalite which is nice and level. I need to board this wall out with insulated tile backer boards. 

 

I was planning to prime the thermalite wall with SBR

Then apply a rapid set flexible cement based tile adhesive to the tile backer board with a 1/4 inch trowel and then fit the board to the wall. Once the tile adhesive has dried I was going to mechanically fix the board as well. 

 

Does this sound correct?

[nod]

You can bed the tile board on But must mechanically fix once set 

BG do a knock in for this purpose 

[tommyleestaples]

Sorry what do you mean BG do a knock in for this purpose?

[nod]

British Gypsum 

[tommyleestaples]

Thanks will take a look. Just noticed Jackoboard do these fixings, I wonder how they would be with thermalite blocks

 

 

[JohnMo]

Use fixing like these in thermolite blocks

 

https://www.screwfix.com/p/dewalt-anchors-nylon-60mm-50-pack/454HT?gclsrc=aw.ds&gad_source=1&gad_campaignid=901249366&gbraid=0AAAAAD8IdPyrPaWtYCDl-12B6WyYxf6-9&gclid=CjwKCAjw9anCBhAWEiwAqBJ-cxkXAFu8EM2b6-pp6eH2onsHE_OPHgKWRQ9vbSiWb-nbnB_0IGEZchoCitcQAvD_BwE&gclsrc=aw.ds

[Spinny]

Can these boards be used outside ?

 

I have mentioned elsewhere I need to put 25mm XPS insulation against the outside blockwork under my bifolds to about 500-600mm underground to compensate for a problem with the internal upstand insulation. 

I noticed Fastwarm do a 30mm XPS sheet https://www.fastwarm.com/fastwarm-30mm-xps-insulation-boards-11115-p.asp

 

But when I spoke to them about it they suggested using tile backer board...

https://www.fastwarm.com/fastwarm-30mm-tile-backer-insulation-board-11095-p.asp