Insulation Under Concrete Slab Roof

Rigid insulation concrete products like foam sheeting are easily broken and must be used with an extra vapor barrier plus standard foam or polystyrene concrete insulation does not stop radiant heat loss or gain.

Insulation under concrete slab roof.

Perimeter slab insulation heat loss through an insulated slab windows 33 roof ceiling 8 slab 15 6 doors 5 walls 39 insulation and fenestration criteria table 402 1 1 insulation and fenestration requirements by componenta climate zone fenestration u factorb skylightb u factor glazed fenestrationb e shgc ceiling r value wood frame wall r value. Cement 3 concrete 4 existing drywall 2 plywood 5 wood 3 sheathing type. Under slab 5 more ways to filter. Continuous insulation is applied directly to the slab exterior extending downward from the top of the slab for the distance specified.

In climates zones 4 and 5 and 4 ft. Eps insulation blocks can be custom cut into a variety of shapes and sizes to meet wide ranging job specifications. Historically used as a stable roof insulation eps has gained wide acceptance in wall below grade and under slab applications due to its low moisture absorption strength and stable long term thermal performance. Step 1 excavate the area under the slab to 12 inches below the planned level of the top of the slab.

Get free shipping on qualified under slab foam board insulation or buy online pick up in store today in the building materials department. Continuous insulation extends downward from the top of the slab and along the entire perimeter and completely covers the entire area under the slab. Lack of foundation insulation on below grade and under slab projects can account for up to 25 of a structure s total heat loss. Insulation located below grade shall be extended the distance provided in table n1102 1 1 namely 2 ft.

Ecofoil under slab insulation is superior to traditional outdated forms of concrete floor insulation such as polystyrene or foam sheets. Adding insulation under the concrete floor requires the same skill set and equipment as forming and pouring the concrete slab. This compliance option is explained this way. Eps 3 xps 2 faced or unfaced.

Perimeter slab insulation should cover as much of the exposed concrete as allowed by code. In climate zones 6 7 and 8 by any combination of vertical insulation insulation extending under the slab or insulation extending out from the building.