Roof Sheathing Baffles

The dual function design creates ventilation channels under the roof sheathing for healthy air circulation while integral baffles prevent wind washing.

Roof sheathing baffles.

Site built baffles have several possible advantages over manufactured baffles. In order to make this kind of roof assembly work insulation baffles or insulation chutes are necessary especially if the attic is going to have any kind of significant amount of insulation in particular blown in insulation that could potentially move around and block off the soffit ventilation from the attic thereby short circuiting air flow from the soffits through the roof s ridge vent. Brentwood s accuvent baffles for roof ventilation are designed to save energy for cleaner greener living spaces. It is a simple yet functional design with the added bonus of keeping unwanted pests from entering your home.

When the wind is blowing these ventilation channels allow air to move from the soffit vents to the ridge vents. 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. As with attic floor insulation moisture and heat removal are the reasons for creating proper air. They can create deeper ventilation channels for example and can be sturdier.

Baffles establish a channel for air to circulate between the insulation and the roof sheathing. When set into place and sealed with spray foam the vent baffles are insulated and air sealed. So why install a baffle.