Hi all, I am amidst a DIY bathroom renovation and have just laid down my DCM pro mat and cable (4.5 sqm). However this morning i noticed that the matting has not stuck down as well as i expected in a few places along the perimeter of the room. I can lift the matting edges quite easily in a few places. I think it has stuck well over the majority of the floor but im now extremely nervous having seen this. Im starting to think that maybe my choice of insulation board was a mistake. I used the following: https://www.amazon.co.uk/gp/product/B00P2K9V2G/ref=oh_aui_detailpage_o07_s00?ie=UTF8&psc=1 The boards are not smooth and have a coarse grid like mesh. I think the DCM matting isnt making full contact with the boards hence the lack of adhesion. I totally overlooked this scenario. The boards were cleaned and primed before installation of the matting so dust free. Not sure how to proceed now.