Spray Foam Insulation In Existing Walls Cost
Camila Farah
The average cost of applying spray foam insulation is 1 879 with most homeowners reporting costs between 1 024 and 2 948.
Like any project or insulation type the specific cost of spray insulation varies greatly according to the size of your home or room. A board foot is one square foot that is one inch thick or one square foot that s covered by one inch of spray foam insulation. An installation of spray foam insulation costs between 1 36 to 2 63 for every square foot depending on whether it s closed or open cell. Cost to install spray foam insulation.
Open cell spray foam costs roughly 0 80 per board foot to insulate a 2 4 wall. Spray foam insulation costs range from 1 00 to 6 00 per square foot depending which part of the house you will insulate. Expanding foam insulation costs from about 0 50 to 2 50 per square foot. For instance if your home is 2 200 square foot home you will incur a cost of 1 254 if you install open cell foam insulation of the minimum 1 5 inch thickness.
For example if you are doing renovations in your first floor and will insulate the exterior walls of approximately 600 square feet. This means that some material must be wasted which will effect the final cost. The walls are overfilled with foam and then shaved flush during installation to maximize thermal resistance. Closed cell spray foam.
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Spray foam insulation costs 1 36 to 2 63 per square foot to install and blown in fiberglass insulation costs 0 40 per square foot to install. The cost of doing all four of the exterior walls could range anywhere from 4 000 to 8 000 depending on a variety of factors. The size of the treated area to be injected with foam insulation is the largest contributing factor to the cost of the project. Spray foam insulation is substantially more energy efficient and does not lose r value for its 80 years of life.
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