Under Shingle Roof Vents

This is a very complicated assembly which should be attempted only by seasoned builders.

Under shingle roof vents.

A lot of work and best if combined with a new roof. Roofing shingles and materials plus factory certified roofers including ratings from real homeowners from north america s largest roofing manufacturer. Smartvent can be installed under virtually any shingle course when proper installation techniques are used. Soffit vents are recognizable for the narrow slits that provide open space into which air can flow.

There are a number of different types and styles of soffit vents. The ridge of the roof is prepared similarly for both types of ridge vent. My roof has had 12 soffits so not as challenged as yours but i added 4 to my siding for exterior foam insulation and didn t want to reduce my soffit size so i extended most of my rafters to get back to 12 and 18 on my dust pan in back. Here is how you do it.

An aluminum ridge vent has a mushroom shaped profile combined with a wide flange on both sides that sits on top of the roof shingles. They let moisture and hot air exit the attic but they aren t nearly as effective as other types of roof vents and homes generally need to have several of these units for the best results. There is no maximum slope installation. Soffit vents are commonly made of aluminum or vinyl and are installed into your soffit the surface under the eave of the roof.

Back to shingle vents in a minute. Smartvent is nail gunnable. Place the flashing or boot onto the plumbing vent so the base is resting on shingles. Imo low shingle vents or edge vents will be vulnerable to ice dams which as you probably know can show up even with the best roof insulating installs.

Use of ridge or off ridge exhaust vents is required. This aluminum cap is the finished product and does not require additional asphalt shingle ridge caps. It s a roof top installed shingle over intake vent that can be used to supplement existing soffit or undereave vents. Residential and commercial roofing shingles slate roof ventilation roof underlayments asphaltic and tpo roof membranes.

An array of vertical 2 4 spacers creates vent channels over the foam and under the new plywood sheathing a second roof deck to which the new roofing will be nailed. Install shingles as normal up to the base of the plumbing vent. It allows air to flow freely through the 1 roof decking slit providing more than adequate soffit ventilation to maximize ridge vent effectiveness. Unlike box vents which are square off ridge vents are usually much longer and thinner.

Momentarily lift the boot and apply sealant to hold the flashing in place. Smartvent should be installed on shingled roofs with a minimum 4 12 pitch. Installing a roof plumbing vent is typically an easier task than flashing a chimney. Along the soffit edge of the roof or the facing edge of dormer rakes and goes virtually unnoticed.

Insulating over the roof. Perhaps the most expensive solution is shown here.