Floor Insulation
High-strength XPS under the screed — floors that stay warm underfoot and carry every load above them.
One System, Built to Work Together.
Floor insulation lives under screeds and finishes, permanently compressed by everything above. It demands boards with real compressive strength that never lose thickness — exactly where XPS excels.
Insutech XPS boards lay flat and tight over slabs, take the screed directly, and isolate the floor from cold ground for the life of the building.
- Ground-bearing floor slabs
- Heated screeds and underfloor heating
- Cold stores and chilled areas
- Terraces above unheated spaces
- Warehouses and industrial floors
Layer by Layer.
- 01
Structural Slab
The concrete slab, cured and level, ready for the build-up.
- 02
Damp-Proof Membrane
A membrane separates ground moisture from the floor build-up.
- 03
XPS Insulation Boards
High-compressive-strength boards laid tight with staggered joints.
- 04
Screed
A floating or heated screed spreads loads over the insulation.
- 05
Floor Finish
Tiles, timber or coatings complete the warm floor.
01Takes the Load
XPS compressive strength carries screeds, traffic and racking without creep.
02Warm Underfoot
Ground chill stops at the insulation line, not at your feet.
03Unbothered by Moisture
Closed-cell XPS keeps its performance even against damp slabs.
04Made for Heated Screeds
Underfloor heating drives its warmth up into the room, not down into the ground.
Common questions about this system.
Where is the Floor Insulation system used?
It is typically used for ground-bearing floor slabs, heated screeds and underfloor heating, cold stores and chilled areas, terraces above unheated spaces and warehouses and industrial floors.
Which Insutech products are used for floor insulation?
The recommended system is built with Insu Foam, Iso Foam, Blue Foam and EPS 30kg/m³ — full details for each are on the recommended products cards on this page.
How is the system installed?
The system is installed in 5 stages: structural Slab, damp-Proof Membrane, XPS Insulation Boards, screed and floor Finish. The system build-up section on this page illustrates the full sequence.
What are the main advantages of the floor insulation system?
The key advantages are takes the Load, warm Underfoot and unbothered by Moisture — each is explained in the Key Benefits section on this page.