Spray Foam Insulation Retrofit Attic

With a move towards passive homes non vented attics are becoming the obvious choice for enhanced energy efficiency.

Spray foam insulation retrofit attic.

A lot of builders and homeowners are going with spray foam insulation because of the airtightness benefits but then the questioner mentioned that the spray foam contractor had intentionally left big holes to the outside by not sealing the gable vents. Unvented attics sometimes called sealed enclosed or encapsulated attics feature insulation on the underside of the roof decking rather than on the attic floor. The unvented attic space is considered the most effective and up to date building practice particularly by the spray foam industry. Give us a call today at 763 241 2092 to schedule a retrofit insulation estimate.

Vented attic and non vented attic. Foam lok retrofit foam insulation adds tremendous r value to exterior walls achieving up to r 13 in 2 x 4 walls and up to r 21 in 2 6 walls. A while back i wrote about the incompatibility of putting an atmospheric combustion furnace in a sealed attic. Additionally foam lok retrofit foam insulation reduces energy use in buildings beyond its stated r value because foam lok retrofit foam.

Spray polyurethane foam insulation is commonly used in one of two ways to insulate your attic space. In a non vented attic insulation is applied directly to the underside of the roof sheathing to insulate the entire attic from seasonal heat and or cold. Most often the attic is sealed by installing spray foam insulation at the roofline thus bringing the attic inside the building enclosure and turning it into conditioned space directly or indirectly. The good news is that some installers understand this problem and seek to address.

Spray foam is installed between the roof rafters along the soffit areas and directly to all exterior surfaces such as gable walls dormers etc to produce an air tight building envelope. Moreover if you choose spray foam the material expands into the hard to get areas and fills in any holes and openings that cause drafts and water seepages. Nothing unusual about that.