Insulation Under Concrete Slab On Ground

Slabs that include embedded hydronic tubing for radiant heat always need a continuous layer of horizontal insulation under the entire slab.

Insulation under concrete slab on ground.

If your slab is heated it s a good idea to increase the r value of the vertical and the horizontal insulation to at least r 20. A careful evaluation of these materials performance attributes against the project s needs can dramatically shrink labor and material costs. Under slab 5 more ways to filter. 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.

Kooltherm k3 floorboard is a super high performance fibre free rigid thermoset closed cell phenolic insulation for solid concrete ground based floors. 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. Our businesses in australia. Unitherm is made from unipoly a light weight moulded polystyrene material with exceptional thermal insulation properties.

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. 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. Get free shipping on qualified under slab foam board insulation or buy online pick up in store today in the building materials department. Eps 3 xps 2 faced or unfaced.

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. Suitable product for concrete slab on ground floor. Adding insulation under the concrete floor requires the same skill set and equipment as forming and pouring the concrete slab. Additional insulation is applied along the edges of the slab because that is a primary surface for heat loss.

Faced 2 unfaced 3 insulation features. Step 1 excavate the area under the slab to 12 inches below the planned level of the top of the slab. Cement 3 concrete 4 existing drywall 2 plywood 5 wood 3 sheathing type.