How To Make Attic Ventilation Baffles

Rafter baffles are sheets of plastic foam or cardboard that fit between the rafters in your attic to prevent moisture accumulation and add insulation to your home. It may be easiest to locate and mark them from below. You will need a baffle for each space between the rafters.

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Firmly pass the scissors handle across the tape.

How to make attic ventilation baffles.

Be careful of any roofing nails that may be sticking out of the rafters or bay. Staple the edges into place with the staple gun making sure they are lined up correctly and securely. Put on your safety gear. Put the straight est edge of the block at the baffle fold.

Measure the distance between your rafters and purchase enough rafter vent baffles to install one over each. Affix the insulation block to the baffle scissors and double sided carpet tape. How to install attic rafter vent baffles step 1. Attach a headlamp to your hard hat to free up your hands as you work.

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. Rafter baffles should be installed before dry wall or insulation. Baffles establish a channel for air to circulate between the insulation and the roof sheathing. Fit each one snuggly in the bay with the bottom starting where the ceiling joist meets the roof rafter.

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. The deeper the insulation the longer the baffles have to be. When set into place and sealed with spray foam the vent baffles are insulated and air sealed. As with attic floor insulation moisture and heat removal are the reasons for creating proper air.

In a traditional cape cod house with 4 foot kneewalls there are two ways to install ventilation baffles. Locate the soffit vents in the eaves of your home. Set the baffles and a loaded staple gun inside the attic opening and boost yourself into the attic. 1 2 inch foil faced rigid foam insulation.

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