Ply or not?

[GazLC81]

Ok I have read a few other post relating to this now.

I have got 6mm backer board from topps. It's going on to floor boards which are down well and in good condition.

I am using a single part flex adhesive and flexible grout.

Will this be ok? I need to make sure the job is right. I took the advice of the guy in Topps but that doesn't mean he is right.

Do I just put the boards down like ply? Screw at 250mm centres? Then Bal Bond?

Cheers
Gaz

 

[DHTiling]

Well gaz...i put the thickness question 6mm or 12mm to gaz@topps and he said that bal adhesives dont guarantee there products on floors if you use 6mm backerboards....but saying that ..they say that about a lot of products.....should be ok if screwed down aswell every 200mm.... aswell as poly adhesive bed.... no need to prime backer boards...............dave..

 

[GazLC81]

Well gaz...i put the thickness question 6mm or 12mm to gaz@topps and he said that bal adhesives dont guarantee there products on floors if you use 6mm backerboards....but saying that ..they say that about a lot of products.....should be ok if screwed down aswell every 200mm.... aswell as poly adhesive bed.... no need to prime backer boards...............dave..

What do you mean poly adhesive bed Dave?

 

[DHTiling]

flexible adhesive...doh........lol.........dave....

 

[GazTech]

powder/parrott mix

 

[GazLC81]

flexible adhesive...doh........lol.........dave....

So I need to put down a flexible adhesive and then put the board on that and then tile on top?

Gaz

 

[DHTiling]

flexible adhesive---backerboard--screw it down---then tile......dave..

 

[Varley]

The lads in my Topps store also said that 6mm backerboard is now to be used on floors and they don't stock the 12mm anymore, can you confirm this Gaz@Topps?

 

[Fekin]

Do you bother to countersink all the screws dave ?

 

[grumpygrouter]

Do you bother to countersink all the screws dave ?

You talking about ply or backerboard? With ply the drill/driver will act as a self countersink so you can screw down flush. Backerboard - can't help as I have never used it yet.

Grumpy
----
Oh, also with ply, it is a good idea to pilot drill wider than the shank of the screw. If you just drive screws straight through ply it can have a trendancy to lift the ply slighty so you get voids underneath. If you pilot drill, the head of the screw clamps the ply down tight to the boards underneath.

Grumpy