question about mesh v's ditra - Tile Advice

[hmtiling]

Osb is sterling board

 

[Rina Rowe]

Thanks everyone. The builder has bought in a tiler. So just to clarify if I manage to get him to use ditra mat it shouldnt go on top of OSB. (It has been nailed down.)

 

[J Sid]

OSB will be ok but not the best choice.
Ditra should be fixed with Ardex AF200 then tiled.

 

[J Sid]

OSB will be ok but not the best choice. It must be screwed down NOT nailed
Ditra should be fixed with Ardex AF200 then tiled.

 

[Flintstone]

not sure about nailed down.
Any photos of the job, we all love a picture on here

 

[Rina Rowe]

Our spec specified 'Hard board floor to be fitted above floor boards', entire floor to be covered with ditra mat before tiling.' Is hard board so different to OSB? I am not sure what grade OSB is. Im going to ask the builder. Photo on the way!

 

[On one]

Did a architect specify Hardboard?

 

[Rina Rowe]

Photo of mesh on osb

 

[Rina Rowe]

Yes architect specified hard board

 

[Flintstone]

Is that tile stuck down ?
I wonder if hard board is a generic term for over boarding

 

[Blunt Tool]

View attachment 90461 Photo of mesh on osb

That picture bottom right, that does not look like wooden floorboards more like chipboard?

 

[Rina Rowe]

YES they have already stuck down about 10 tiles. OSB is 18mm thick. B & Q website write about it stating.....
OSB is a versatile and durable building board. It’s construction is similar to that of Plywood, with opposing-orientation of wood fibres that creates rigidity and strength. OSB has superb load-bearing properties, excellent cross dimensional stability and an attractive wood patterned finish.

• Suitable for wall sheathing, flooring, roofing, general construction and rennovation work, formwork and long term site hoardings.
• Load bearing/structural board for use in humid conditions.

 

[Flintstone]

Can you put some more photos up, the reason I ask is, if doesn't look like floor boards, and there's no adhesive showing under that tile.

 

[Blunt Tool]

YES they have already stuck down about 10 tiles. OSB is 18mm thick. B & Q website write about it stating.....
OSB is a versatile and durable building board. It’s construction is similar to that of Plywood, with opposing-orientation of wood fibres that creates rigidity and strength. OSB has superb load-bearing properties, excellent cross dimensional stability and an attractive wood patterned finish.

• Suitable for wall sheathing, flooring, roofing, general construction and rennovation work, formwork and long term site hoardings.
• Load bearing/structural board for use in humid conditions.

Please don't start trying to justify builders work, we are trying to help so that it doesn't look nice for a few month then all cracked and lifted after. The more information and photos you can give us the more we can help

 

[Rina Rowe]

Sorry I am definitely not trying to justify the builders work. I am just quoting from b and q website to provide more details on osb. Thanks so much for trying to help!
I don't have more photos tonight, can get more tomorrow. There is grey flexible adhesive under that tile, builder says he is using extra adhesive because of mesh. Thanks so much for all the comments and help so far!