Insulating Concrete Walls Below Grade

Any of the following insulation materials are acceptable for this purpose.

Insulating concrete walls below grade.

The best way to insulate the interior side of a basement wall is with foam insulation that is adhered to or sprayed directly on the concrete. Closed cell spray polyurethane foam or either xps eps or polyisocyanurate rigid foam. Wet insulation is ineffective insulation rigid foams that retain high volumes of moisture lose about half of their insulating r value. However for masonry block walls and below grade insulated concrete forms the surfaces must first be prepared.

Basements however have specific features that must be kept in mind when it comes to insulating the foundation from the inside starting with the fact that a variable portion of the walls is below ground. Preparing masonry block walls for exterior damp proof coating. The variety of concrete masonry wall constructions provides for a number of insulating strategies including. Rigid foam can be adhered to a poured.

A properly insulated basement provides comfort and is a good way to save on your energy bill. For poured concrete walls a damp proof coating can be applied directly to the surface. Interior insulation insulated cavities insulation inserts foamed in place insulation granular fills in block core spaces and exterior insulation systems. If the foundation is on frost susceptible soils install a layer of impermeable insulation horizontally in the soil at a slope ratio of 1 5 for at least 1 m 3 ft.

Insulation on the exterior of below grade portions of the wall is. Both above and below grade icf walls are durable sound reducing energy efficient and disaster resistant. Installing rigid foam insulation below grade on building foundations the insulation whether eps or xps is installed over the damp waterproofing after that layer has adequately cured. Crews can use mechanical fasteners or polystyrene compatible adhesive to attach the insulation.

Insulation is applied to houses with slab on grade foundations exactly as you would insulate the outside of a full basement see section 6 1 insulating the basement from the outside. However because of soil conditions below grade walls require added waterproofing steps unlike above grade walls. Basement walls made out of concrete stone concrete bloc and other masonry foundation materials have very minimal insulating properties and cause approximately 20 of heat loss in a home.