Spray Foam Unvented Attic

Spray foam insulation in an unvented attic assembly has been one of the most researched and widely implemented innovations of recent years.

Spray foam unvented attic. This allows you to install your bulkheads above the ceiling plane without the need for spray foam insulation. Common problems found with traditional insulation in an unvented attic assembly can be mitigated with spray foam insulation like icynene. The roof deck in an unvented attic must be exceptionally airtight. We mean that literally by the way.

When you insulate the top of your attic with spray foam you re bringing your attic into your home s envelope as a result you can reduce the temperature in your attic by a lot anywhere from 120 degrees to around 95 during peak summer. Unvented roof assemblies should be insulated either with air impermeable insulation rigid foam or spray polyurethane foam or with a combination of foam and air permeable insulation. Code requirements vary across the country. An alternate to spray foam insulation in an unvented attic is plenum trusses which allow you create a reverse bulkhead above the ceiling plane that is insulated.

Over time feedback from builders and building owners has been and continues to be overwhelmingly positive especially in the areas of moisture performance energy efficiency and building durability. The irc has permitted unvented conditioned attics since 2006 with certain requirements. How to insulate my attic and preparing for winter. Keep bulk moisture out closed cell spray foam is a.

If you don t want to use sips or nailbase read this article tolearn the four basic approaches to insulating unvented roof assemblies. The unvented attic space is considered the most effective and up to date building practice particularly by the spray foam industry. The trusses do cost more but this added expense can be mitigated by a. Most unvented attics incorporate spray polyurethane foam spf on the underside of the roof deck and attic walls.

Spray foam in unvented attics intended for regular use helps. Spray foam in unvented attics allows homeowners to convert the area into a liveable space. Unvented attics sometimes called sealed enclosed or encapsulated attics feature insulation on the underside of the roof decking rather than on the attic floor. Attics with spray foam insulation are so cool.