6mm Marmox on Floor in Prep for UFH

[siremastimus]

Hi, have remove my floorboards and replaced with 18mm WBP ply and now need to lay down some 6mm marmox boards in preperation for under floor heating in bathroom. The general opinion seems to be to screw to ply wood using marmox washers and also lay on a bed of adhesive. Silly question but should I lay the marmox down with the adhesive and then once dry, screw down or screw down before adhesive has set? Thanks

 

[Ian]

Screw down while the adhesive is still wet.


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[siremastimus]

Thanks will do, one more thing should I prime the ply with SBR before laying marmox - have some left over from walls so was thinking 3:1 ratio and brush on?

 

[White Room]

If it's new ply check what the manufacterer recommends with there adhesive..