Achieving a u value of 0 25 would be a good target.
Floating floor over rigid insulation.
In this method individual planks or in some cases tiles interlock edge to edge to.
Stylite have created the eps range of insulation boards specifically for floor insulation and can be used with any floor substrate in a wide range of applications from domestic to industrial flooring.
Glue down click lock or loose lay.
That would need 90mm of rigid foam or 150mm mineral wool.
Stylite eps floor insulation boards.
You may want to look into a 1 2 rubber material instead.
Stylite eps floor insulation is available in a range of different thicknesses and sizes.
This system is usually installed over sound proofing material.
Floating floors have become increasingly popular for many types of floor coverings.
Starting from the bottom the floating floor insulation is laid over the concrete slab and screed and damp proof membrane if necessary.
The flooring is separated from the insulation board with usually polythene and covered with the floor finish such as carpet or laminate floor for example.
Or as demonstrated here you can cover the slab with rigid foam insulation add two layers of plywood and then add the finish flooring.
However if you are installing vinyl flooring over a concrete sub floor you will need a very thin vapor barrior such as visqueen vapor barrier underlayment to protect your flooring from.
Rockwool offers stone wool insulation products to meet and exceed thermal regulations in floor constructions as well as solutions for separating floors to prevent heat transfer between the upper and lower floors.
A semi rigid material is generally best as it can be cut very slightly oversized and squeezed in between the floor joists thereby ensuring no draught causing gaps.
Interior wood framed floor insulation.
You can attach wood sleepers to the floor fill the gaps with rigid foam insulation and then apply your finish flooring.
You just need to make sure your foam insulation doesn t get crushed with all the weight on top of it.
But a floating sub floor can be used by using two layers of 3 8 or 1 2 cdx 1 screwed to each other.
There are two ways to handle insulating concrete floors.