Tiling over a tongue and groove wooden floor boards laid on concrete

[figgy2000]

Hi,

This is my first post so Hi to everybody!
My question being I want to tile using Travertine tiles on to 20mm thick tongue and groove floorboards which are glued using a bitumen type substance and also nailed at intervals directly into a concrete floor - do I need to use a tile backer board 6mm or 12mm or can I lay the tiles directly onto the tongue and groove using a suitable flexible adhesive??
I can feel no deflection/movement whislt walking on the floor as I can when walking on a wooden floor fixed to floor joists it feels extremely solid

Thanks

 

[DHTiling]

Hi and welcome...

That is a new scenario on me.... doesn't sound good with it being nailed... have the boards been laid for decorative reasons.. ?

I would be tempted to remove and go back to a solid substrate but would be good to know the reason for that timber/bitumen being laid.

 

[The Legend; Phil Hobson RIP]

Hi figgy and welcome, that is a new one on me. I would be tempted to get back to solid concrete and use backer board and/or slc just my take on it.

 

[Andy Allen]

i would take the floor boards up remove the bitumen and tile direct to the concrete floor..

 

[The Legend; Phil Hobson RIP]

Snap Dave Snap Andy

 

[Stewart]

I've seen decorative floorboards fixed to concrete with bitumen before, but never nailed too. We removed the boards as the bitumen was only laid in strips every 600mm. We replaced with Marmox then tiled.




Created on iPhone.....

 

[hillhead]

If it's so solid maybe ditra placed over it then tiled might work too.
Hard to know without seeing it though.

 

[figgy2000]

Thanks guys for the replies,
The entire bungalow flooring is the same its all tongue and groove fixed with bitumen & nailed using hand cut nails (according to the builder I had it was common practice in the 1930's)

 

[Ajax123]

Ive seen bitumen used to stick bords as well but not nails. Perhaps it was nailed to try and stop it curling cos the concrete was wet. The nails will probably prove tough to get out as they will haverusted into the concrete. I agree though that hey should be removed and tiles directly to concrete

 

[Topshop]

Yes, the wood boards are going to be effected by moisture from the air and the concrete and will expand, contract, and curl - not a good idea for a surface with tile adhered to it.

 

[nybor62]

not much else to had remove imo

 

[Staines]

Can I ask whether you removed the bitumen strips before laying the marmot. I am about to be faced with the same challenge and wanted to know how you got on. I am about to lay marmot onto a floor which had parquet flooring. There is currently remains of bitumen. What adhesive did you use? Did you also screw the marmot?