DIY Doctor UK DIY Forums

Hi,
Is this right, having extension built, with planning permission & under building regs. I have asked builder but says it's ok. Earth, then some rubble, 100mm approx concrete on top of that, 100mm Celetex, plastic membrain sheet over that then 20mm chipboard flooring to finish.
Should the membrain be under the concrete ?

Thanks

Hi
I suggest you contact the building inspector,He had to inspect the floor before the concrete slab was laid,

Today’s flooring market is seeing an ever-increasing variety of options. Woods such as bamboo and cork are taking their place alongside more traditional materials, and tile is making a big comeback. Concrete is a viable alternative to traditional flooring materials that you may not have considered. Regarding to your situation, you should ask the expert because it is somehow complicated.