Building Science Corporation Attic Air Sealing

Guide to attic air sealing.

Building science corporation attic air sealing.

Here the architect and builder discuss the ventilation strategy while they still have access to the space. Install an air barrier at the vertical edges of the insulation at the attic eaves in all climate zones using a wind baffle that extends to the full height of the insulation in every rafter bay or a tabbed baffle in each bay with a soffit vent. There s a lot more to it than just the amount of air flowing into and out of a room. Sealed attic construction by excluding vents to the exterior can be a good way to exclude moisture laden outside air from attics and may offer a more easily constructed alternative for air leakage control at the top of residential buildings.

The only place air should be able to leave the supply duct system and the furnace or air handling unit is at the supply registers. Upcoming events renovation and rehabilitation. Building science corporation may 22 2009 ductwork furnaces and air handlers should be sealed against air leakage. For non dated media such as websites the date listed is the date accessed.

Building science cold climate attic air sealing. Noel hardin the zip system sheathing on the attic floor creates a tight air seal. Where walls of varying heights meet install blocking if needed in any wall cavities that are open to an unconditioned attic or other unconditioned space. Use rigid blocking material such as lumber plywood osb or rigid foam caulked or sealed at edges.

The attic air sealing details section provides a scope of work and specification for the air sealing of many points of air leakage in common attic spaces. The guide to attic air sealing provides information and specifications to the following groups. The baffle will also prevent wind from washing through the insulation in adjacent bays. A building science consulting and full service architecture firm specializing in building technology for all types of buildings including commercial institutional and residential.

Building science corporation may 15 2014 typical penetrations through the primary components of the air barrier system include plumbing pipes and vents electrical wires and conduits electrical fixtures other mechanical services and in some cases structural members. Noel hardin the stick framed attic volume is reserved for blown cellulose insulation with no storage or equipment. Air sealing is a different story though.