How To Vent Low Slope Attic Without Soffits

Venting solutions for roofs with no overhang or soffit.

How to vent low slope attic without soffits.

If i had an older home without soffits i would strongly consider just completely air sealing the attic and adding foam insulation totally removing the need for ventilation. Draw it on the roof deck. I need additional exhaust ventilation in my roof with the planned installation of a whole house fan in the attic of my home located in sf bay area. Install special roof intake venting products that work at the lower edge of the roof decking underneath the first course of shingles.

Read this article to learn why. Drip edge vents hang out several inches past the edges of the roof allowing you to trim 1 inch from the top of the fascia to allow air into the attic. It involves making sure that the insulation is good enough that cenvection currents within that material are effectivly eliminated and applying a vapour barrier with good integrity to the inside of the living space as a general rule. Another plastic venting product fits under.

One great alternative to a soffit ventilation system is to install an intake vent right at the lower edge of the roof. You mention exhaust vents shouldn t exceed intake vents in the roof for proper circulation. The venting drip edge seems to be the easiest and most common way to go. With old homes it can be very difficult to properly ventilate the attic for a variety of reasons.

However with only two 1 ft x 2 ft gable roof vents i ll need an additional 7 sq ft of exhaust vents. The other strategy is cellulose insulation which is dense blocks airflow and contains salts that inhibit mold growth. A ridge vent without a soffit vent just doesn t work. And compact roof assemblies are clearly the only acceptable base for low slope roof assemblies.

Smart vent a special roof eaves vent product that provides a 3 4 opening about 6 above the top of the roof drip edge. There are methods for doing rof cavity insulation with no ventilation. But if you don t have eaves or if you have shallow soffits like me ventilation can be a challenge. Intake vents located at the lowest part of the roof under the eaves allow cool air to enter the attic.

Check with the manufacturer of the roof vent to see if there is a need for more than one vent. Remove the shingles in the area where the vent is to be installed. In my opinion many of the innovative.