sticking plywood to screed

[jonnyc]

anyone recommend best produst to fix 18 mm plywood on to screed.
Would rather stick than scew and plug or fix with tube grip fill or similar.
i have heard that there is a flexible adhesive that be used with notch trowel to get good coverage.
Have found laybond L 19 which doeas job exactly right but cant get any today.they only have stock in bath
we are near guildford/petersfield in surrey.

thanks

 

[Dave Ramsden]

if the floors to be tiled I wouldnt reccomend anything but screwing every 4 inch square...

 

[mikethetile]

how long has the screed been down

 

[jonnyc]

the plywood will have ditra mat on top.
only reaso using ply is because the other half of floor will be plyed before ditra so making sure we straddle two different substrates with ply before ditra and tiling.

 

[jonnyc]

screed been down for years.
heres no problems anywhere except that i need to find a flexible adhesive to stick ply to screed like laybond L19 which i cannot get hold of at short notice.

 

[Perry]

rapid spf dont screw and plug it ete

 

[White Room]

Why don't you use a control joint between the two surfaces

 

[Aston]

i am really not a fan of 'sticking' ply onto screeds
wood is meant for wood imo, screwed ! but thats just me ...

 

[White Room]

Same as

 

[hillhead]

with ply screw for sure.A lot of the chinese ply is NOT suitable for tiling ! so better safe than sorry.

 

[Peter]

Is it a case of plugging and screwing or is there any other type of screw that can be used?

 

[jay]

why not use hardiboard cement sheet:20:

 

[Perry]

i am not a fan of tiling onto wood but a lot of floors are made of wood but you are better putting adhesive both sides than one side and if the ply is not being suitable for tiling as its Chinese buy something else but better still use backerboard and I have done it many times when I have had to in high traffic areas never had a problem to date ete

 

[jonnyc]

I offered the backer baord option but plywood and ditra was preferred by client.
Anyway thanks but we have found some adhesive locally now

 

[Perry]

I offered the backer baord option but plywood and ditra was preferred by client.
Anyway thanks but we have found some adhesive locally now

what adhesive did you use and what was the ditra for was it a large floor ?