Allow Air To Flow Into Attic

Unvented attic assemblies unvented attics rely on an air impermeable insulation installed to the roof deck s underside i e.

Allow air to flow into attic.

In addition insulation baffles must be installed at the point where the attic floor meets the roofline to prevent the attic insulation from migrating into the cavities and restricting the airflow from the soffit vents. If your attic is well insulated the insulation might be plugging the spaces between rafters just above exterior walls. The narrow soffit slits allow air to flow freely into your attic. Baffles or rafter vents are a styrofoam chute designed to allow air flow into an attic space when the airflow at the soffits have been obstructed.

The airflow pushes the hot air out which is exactly what you need to keep your attic cool during the summer. Taking advantage of this natural process referred to as passive ventilation is the most common way to vent an attic. That means air can t flow from the soffit vents to the roof vents. The solution is to add baffles which allow air to flow past the insulation photo 9.

Proper insulation and air sealing also keeps attics cold in winter by blocking the entry of heat and moist air from below. These are exhaust vents that are installed on the ridge of your roof i e. They are a proven and cost effective solution for improving air intake in many homes. Hot air exhaust vents located at the peak of the roof allow hot air to escape.

Attic ceiling to stop airborne moisture from reaching a cold surface and condensing inside the building envelope in this design insulation effectively separates the interior and exterior spaces while slowing down moisture flow so the dewpoint is not achieved within. If the soffit of your home isn t perforated to allow air movement either replace it with perforated soffit or install round air vents under the eaves to allow air flow. Baffles or rafter vents are an ideal choice for improving intake venting. The soffit vents allow convective air movement from the soffits of the residence to the ridge vent.

Make sure there is air flow from the eaves. This is normally the point where air enters your attic. Baffles are available at home centers.