There will be a damp proof membrane under the insulation and possibly a second membrane on top depending on the type of screed.
How to lay a concrete floor with insulation.
If you live in a cold climate then you re no stranger to cold concrete floors in the winter.
You may need to grind down significantly high spots to ensure an even surface.
Before you lay your concrete floor you ll need to take a few things into consideration the first of which will be your building regulations.
Also check the floor for smoothness and level.
1 to prepare for insulating the floor first evaluate the condition of the concrete.
How to lay insulation under a concrete floor slab and advice on target u values damp proof membranes and underfloor insulation boards.
We recommend to use a carpet underlay prior to a carpet being installed.
How to lay concrete with insulation.
Glue the sleepers down with foam board adhesive and use masonry nails to attach them to the concrete below the insulation.
If your concrete floor needs to be reinforced in areas which are likely to be heavily loaded such as garages then a metal mesh standing on plastic feet will be put down before the concrete is poured.
When ceiling height is an issue.
Install your finished flooring of choice on top.
Finally install a sub floor of 3 4 or 5 8 inch exterior grade plywood or osb panels nailing them to the sleepers.
Get an understanding about the importance and what is involved in insulating a floor slab.
Wood laminate flooring can be installed directly on top of floorfoam.
Insulating a floor slab how to lay insulation under a concrete floor slab.
In this scenario a rigid foam insulation is usual and as you d want the same u value in the roof we need the same thickness of insulation 180mm.
Installing insulation prior to the pouring of a concrete slab floor improves the energy efficiency of the floor and makes it more comfortable.
Once your concrete floor has been covered with floorfoam next you can install your desired flooring.
Typically 75 100mm of rigid.
Laying a concrete floor is a very labour intensive task and cannot be performed alone so ensure you have a few hands to help you before you begin.
If you re planning on finishing a basement or portion of your home that has a concrete floor then it may be a good idea to insulate it before installing basement flooring.
If you know you have issues with moisture tend to those problems before installing the insulation.
If a vinyl or lino is being used we would advise the use of a plywood over the top of the floorfoam.