Attic Baffle To Cover Soffits Too

If your attic is well insulated the insulation might be plugging the spaces between rafters just above exterior walls.

Attic baffle to cover soffits too.

That means air can t flow from the soffit vents to the roof vents. Run baffles the entire length of the rafter bay from the soffit vent to the ridge vent then add batting insulation over the baffles. In this post we cover the intake ventilation. Attic length x attic width 150 total vent space or net free area nfa my attic has an area of 1 288 square feet so my nfa is 8 5 square feet.

The molded polystyrene baffles available at home centers and lumberyards for about 1 each form channels that hold insulation at bay and direct incoming air upward. If this does happen the soffit vents will not function as best as they should and therefore supporting the formation of mold or fungi rather than preventing it. That is split into 4 25 square feet or 618 square inches for both intake and exhaust. Rafter vents or insulation baffles install in any rafter space to create narrow gaps that direct fresh air from the soffit vents to the peak of the roof.

Baffles are available at home centers. Finally to ensure that the airway to the vent remains open staple a ventilation baffle to the plywood sheathing in each rafter bay. Can you have too much ventilation in your attic. The solution is to add baffles which allow air to flow past the insulation photo 9.

The attic roof vent baffles baffles hold the insulation away from the roof deck to permit air to enter the attic or under roof space.