How To Vent Low Slope Attic Without Soffits

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.

How to vent low slope attic without soffits.

Remove the shingles in the area where the vent is to be installed. The venting drip edge seems to be the easiest and most common way to go. 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. Venting solutions for roofs with no overhang or soffit.

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. Check with the manufacturer of the roof vent to see if there is a need for more than one vent. A ridge vent without a soffit vent just doesn t work. Determine the shape of the hole needed for the vent.

But if you don t have eaves or if you have shallow soffits like me ventilation can be a challenge. Read this article to learn why. In my opinion many of the innovative. There are methods for doing rof cavity insulation with no ventilation.

Draw it on the roof deck. 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. You mention exhaust vents shouldn t exceed intake vents in the roof for proper circulation. Another plastic venting product fits under.

However with only two 1 ft x 2 ft gable roof vents i ll need an additional 7 sq ft of exhaust vents. One great alternative to a soffit ventilation system is to install an intake vent right at the lower edge of the roof. Intake vents located at the lowest part of the roof under the eaves allow cool air to enter the attic. The other strategy is cellulose insulation which is dense blocks airflow and contains salts that inhibit mold growth.

Install special roof intake venting products that work at the lower edge of the roof decking underneath the first course of shingles. Smart vent a special roof eaves vent product that provides a 3 4 opening about 6 above the top of the roof drip edge. And compact roof assemblies are clearly the only acceptable base for low slope roof assemblies.