Insulation Under Slab On Ground

Horizontal insulation placed less than 12 inches below the ground surface or that portion of horizontal insulation extending outward more than 24 inches from the foundation edge should be protected against damage by use of a concrete slab or asphalt paving on the ground surface directly above the insulation or by cementitious board plywood.

Insulation under slab on ground.

In climate zones 4 and higher it s also a good idea to install some horizontal insulation under a slab on grade. Our businesses in australia. The answer is simply that the thermal performance achieved is essentially the same as only adding insulation under the floor slab for the first 1 2 m from the. Depending on the use of the building the slab can then be finished ready for use or receive a screed suitable for a floor finish.

Slabmate is the new under slab insulation solution for slab on ground construction slabmate has been designed to create a thermal barrier adding to the total insulation of the project. Additional insulation is applied along the edges of the slab because that is a primary surface for heat loss. Conversely removing this floor insulation from a 7 5 star home will increase total annual energy consumption in active heating and cooling by between maybe 9 and 26. Kooltherm k3 floorboard is a super high performance fibre free rigid thermoset closed cell phenolic insulation for solid concrete ground based floors.

Continuous insulation is defined in 90 1 as insulation that is continuous across all structural members without thermal bridges other than fasteners and service openings. It is installed on the interior exterior or is integral to any opaque surface of the building envelope. As such accurate models continuous r2 0 under slab insulation as improving the home s star rating by a substantial 0 3 and 0 8 stars. If you want to save money you can install a 4 ft wide band of horizontal r 10 or higher insulation at the perimeter of the slab in a picture frame configuration.

If the insulation is going below the slab the damp proof membrane dpm is laid next followed by the insulation a polythene separating layer and the concrete slab. Environmentally friendly slabmate is made here in australia for both commercial and residential projects slabmate is lightweight safe and easy to install and will maintain its r value for the life the building. For under slab applications the rigid foam insulation typically should be installed over a gravel base with a poly vapor diffusion retarder between the gravel and insulation.