Installing Attic Insulation Vents

Covering up the soffit vents with loose fill or batts which can happen if you stuff insulation along the eaves is a huge no no.

Installing attic insulation vents.

Installation of this type of attic ventilation involves leaving a gap in the sheathing along the ridge and covering it with a perforated vent. If the attic is insulated with fiberglass batts just pull back any that are blocking the flow of air. Generally speaking you need a ratio of 1 300 where for every 300 square feet of ceiling space you need 1 square foot of attic ventilation. The soffit vents are now installed but you still need to make sure there s no insulation blocking the new vents.

The lack of adequate ventilation in insulated attics is a common defect. Complete coverage of the attic floor along with sealing air leaks will ensure you get the best performance from your insulation. Mark the roof venting locations from the attic where you can see the rafters and avoid placing roofing vents over them. Static vents often protrude from roofline thanks to.

Sometimes called rafter vents baffles provide ventilation and keep the insulation from blocking airflow through your attic. Photos 1 6 show how it s done. For the same reason insulation shouldn t touch the roof s underside. Installing rafter vents between the rafters along the soffit on the back of the house allows for air movement.

That said air resistance and interference such as vent grates reduces the area of true ventilation. Rafter vents ensure the soffit vents are clear and there is a channel for outside air to move into the attic at the soffits and out through the gable or ridge vent. This guide covers the installation of this valuable home improvement. Check for a moisture barrier under the insulation.

If there s blown in insulation like ours rake back the fluffy stuff with a 3 or 4 ft long 1 x 6 or use a garden rake or hoe. In order to prevent insulation from clogging each soffit vent you must also install. But before you cut any holes plan the locations of the attic vents. In other words the entire vent opening doesn t count as vented space.

Putting baffles in your attic is a crucial step in installing attic insulation. To completely cover your attic floor with insulation out to the eaves you need to install rafter vents also called insulation baffles. It is a fairly easy process that will make a world of difference in assisting your insulation and keeping your home protected from rot.