Foam Attic Air Vents For Eves

Intake air is critical to maintaining a proper flow of air throughout the attic space.

Foam attic air vents for eves.

Rafter vent 10 pack xudv2248 the home depot. They can quickly remove a larger volume of hot and or humid air from your attic compared to static ventilation which helps save money on your heating and cooling costs. It can be cut to fit most joist spaces and is an affordable way to meet energy code requirements durovent 22 in. Eaves are the undersides of your roof that extend beyond the walls of a building an area commonly directly over decorative plants and vegetation.

The rigid foam is cut to be 2 inches wider than the space between rafters then 1 inch of foam is scored and folded over on either side of the foam creating standoffs that hold the foam away from the roof sheathing providing a space for air to flow. When set into place and sealed with spray foam the vent baffles are insulated and air sealed. Then cover the foam with drywall as required for fire safety. Air enters low and then escapes out of the attic higher up near the peak of the roof usually via a ridge vent an attic fan which we do not recommend static roof vents or a high mounted gable vent fan.

Foam blocks airflow needs no vapor barrier and has a higher r value per inch than loose fill or batts so you ll get more protection with less depth. The standard intake vent for attics is a soffit vent also sometimes referred to as an eave vent and it allows for air to enter the attic down low near the eaves. Spray polyurethane foam will provide thermal insulation that will minimize air infiltration which can help to save on heating and cooling costs within the indoor environment. For decades the typical solution to this problem was to install ventilation baffles near the eaves connecting the air space above the soffit vents with the attic and then to install as much fluffy insulation usually fiberglass or cellulose as there was room for between the top plate of the exterior wall and the ventilation baffle.

Insulation is used in an attic for cross ventilation to minimize potential for moisture accumulation and condensation to help energy savings and moisture control. They are typically easier to install and won t detract from the appearance of your roof. Attic ceiling to stop airborne moisture from reaching a cold surface and condensing inside the building envelope in this design insulation effectively separates the interior and exterior spaces while slowing down moisture flow so the dewpoint is not achieved within. That s why our fire resistant eave vents are especially recommended and in many cases required by california builder code in chapter 7a for the wildland urban interface.

The egv6 power gable mount vent can move air at a rate of up to 1600 cu. Unvented attic assemblies unvented attics rely on an air impermeable insulation installed to the roof deck s underside i e.