S
Stooboy
Hi Folks
After a bit of advice please. I am DIY installing elec UFH and tiles into my kitchen before the new kitchen is fitted. The floor is a concrete slab which I surfaced with a layer of flexible self levelling compound. Then laid 6mm polystyrene insulation boards onto which I laid the UFH mat and then another layer of the compound over the top. All went very well and I was pleased. Came down the next morning and 3 small areas had raised a fair bit forming a hump with a void underneath. The screed is so flexible that there were no cracks. 95% of the floor was nice and flat still. Now then, I now know that I stupidly stuck the 6mm boards down with spray glue (aerosol) thinking they just needed to stay in place during installation. I very carefully cut round the areas of matting where the lot had lifted, pulled it up and put adhesive under the affected boards and stuck back down flat, and re-covered with the compound. So the finished product is now flat and level. My fear is if I tile it and fit the kitchen, when the UFH gets turned on come the Autumn will the tiles lift and crack because the insulation boards are not stuck down? Or will the tiles hold it all in place? Tiles are 600x400. Am I worrying about nothing or am I right to worry and rip the lot out and start again?
Thanks in advance for and advice.
After a bit of advice please. I am DIY installing elec UFH and tiles into my kitchen before the new kitchen is fitted. The floor is a concrete slab which I surfaced with a layer of flexible self levelling compound. Then laid 6mm polystyrene insulation boards onto which I laid the UFH mat and then another layer of the compound over the top. All went very well and I was pleased. Came down the next morning and 3 small areas had raised a fair bit forming a hump with a void underneath. The screed is so flexible that there were no cracks. 95% of the floor was nice and flat still. Now then, I now know that I stupidly stuck the 6mm boards down with spray glue (aerosol) thinking they just needed to stay in place during installation. I very carefully cut round the areas of matting where the lot had lifted, pulled it up and put adhesive under the affected boards and stuck back down flat, and re-covered with the compound. So the finished product is now flat and level. My fear is if I tile it and fit the kitchen, when the UFH gets turned on come the Autumn will the tiles lift and crack because the insulation boards are not stuck down? Or will the tiles hold it all in place? Tiles are 600x400. Am I worrying about nothing or am I right to worry and rip the lot out and start again?
Thanks in advance for and advice.