Exposed Spray Foam Insulation In Attic

Unvented attics sometimes called sealed enclosed or encapsulated attics feature insulation on the underside of the roof decking rather than on the attic floor.

Exposed spray foam insulation in attic.

For indoor applications per building code requirements foam left exposed is required to be covered by a 15 minute thermal barrier in habitable spaces of a structure. Affix rigid foam insulation to the attic side of the hatch or door. If you ve got spray foam insulation in an attic for example it s probably already separated from the living space by a thermal barrier. The unvented attic space is considered the most effective and up to date building practice particularly by the spray foam industry.

Instead it is. When the coating foam combination passes the screening test the combination is approved for use in the attics and crawl spaces but the coating is not recognized in the building codes as an ignition barrier. The most common blown in material used but it can rot and grow moldy if exposed to moisture. This alternative to traditional building insulation fiberglass can be applied into wall cavities holes concrete slabs and even onto roof tiles and.

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. In some cases explanation. Nothing unusual about that. And has a higher r value per inch.

In a traditional vented attic insulation is used on the attic floor to insulate the ceiling from the seasonal heat and or cold. Spray foam attic insulation is used primarily to act as a barrier to limit air movement and. Many spray foam manufacturers test their spray foam systems with an intumescent coating in place of the ignition barrier. But the spray foam is still exposed to the attic and needs an ignition barrier.

Most ceilings are made of 1 2 drywall. Spray foam insulation in the attic floor vented attic spaces the method of use for spray foam in the attic is often dictated by the building science and design principles your architect and or builder subscribes to. If you d like to start saving money and time today buy foam it green spray foam insulation now or call us at 800 516 0949. Spray foam kits are quicker and easier to use plus you get a seamless air barrier and high r value in just 1 inch.

For unoccupied space or that of which is being used for equipment servicing the above does not apply. Earlier this year i got a question about a home that had spray foam insulation in the attic. Add weatherstripping around the perimeter and a sweep to the door of a walk up attic. For attics and crawl spaces being used for storage the above applies.