Spray Foam Insulation Retrofit Attic

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.

Spray foam insulation retrofit 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. Spray polyurethane foam insulation is commonly used in one of two ways to insulate your attic space. Additionally foam lok retrofit foam insulation reduces energy use in buildings beyond its stated r value because foam lok retrofit foam. Vented attic and non vented attic.

The unvented attic space is considered the most effective and up to date building practice particularly by the spray foam industry. The good news is that some installers understand this problem and seek to address. Earlier this year i got a question about a home that had spray foam insulation in the attic. A while back i wrote about the incompatibility of putting an atmospheric combustion furnace in a sealed attic.

Retrofit foam is identical to our open cell spray foam except that the expansion reaction is slowed down. 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. With a move towards passive homes non vented attics are becoming the obvious choice for enhanced energy efficiency. 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.

When injected into a wall cavity retrofit foam falls in its liquid form to the bottom of the cavity before it starts its expansion whereas traditional spray foam insulation expands and cures immediately. 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. Unvented attics sometimes called sealed enclosed or encapsulated attics feature insulation on the underside of the roof decking rather than on the attic floor.