Preparation Tanked plywood and need to Marmox - Tile Advice

[thomasjbyrne]

Please help - I put down plywood and tanked it with a Mapi tanking kit, I painted the liquid all over the floor. We then decided we'd put down a heat mat so we need to put down Marmox insulation tiles. I have the insulation all cut out and have started to screw it down - the screws (with large 36mm washers) are all spaced 30cm apart, so 12 mixing screws per mat. BUT when I now walk on the insulation mat it makes a noise between the Mepi layer and the mat. I'm worries when we tile on the insulating maps (with leveling compound on the mats) that the noise will remain. Will the weight of the adhesive and tiles compress the mats and the plywood to stop the movement noise?
Thanks for the help!!

 

[Andy Allen]

Stick the marmox down with tile adhesive,
As well as the screws with washers.....