How To Make Attic Ventilation Baffles

Baffles establish a channel for air to circulate between the insulation and the roof sheathing.

How to make attic ventilation baffles.

Fit each one snuggly in the bay with the bottom starting where the ceiling joist meets the roof rafter. Measure the distance between your rafters and purchase enough rafter vent baffles to install one over each. How to install attic rafter vent baffles step 1. Staple the edges into place with the staple gun making sure they are lined up correctly and securely.

You will need a baffle for each space between the rafters. Set the baffles and a loaded staple gun inside the attic opening and boost yourself into the attic. Put the straight est edge of the block at the baffle fold. Rafter baffles should be installed before dry wall or insulation.

In a traditional cape cod house with 4 foot kneewalls there are two ways to install ventilation baffles. Attach a headlamp to your hard hat to free up your hands as you work. Affix the insulation block to the baffle scissors and double sided carpet tape. When set into place and sealed with spray foam the vent baffles are insulated and air sealed.

The preferred way is for the baffles to begin above the ventilated soffit and extend all the way to the small attic above the second floor ceiling. Put on your safety gear. Firmly pass the scissors handle across the tape. The deeper the insulation the longer the baffles have to be.

Locate the soffit vents in the eaves of your home. As with attic floor insulation moisture and heat removal are the reasons for creating proper air. 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. Be careful of any roofing nails that may be sticking out of the rafters or bay.