Under Shingle Roof Vents

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.

Under shingle roof vents. This is a very complicated assembly which should be attempted only by seasoned builders. Unlike box vents which are square off ridge vents are usually much longer and thinner. Use of ridge or off ridge exhaust vents is required. 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.

Roofing shingles and materials plus factory certified roofers including ratings from real homeowners from north america s largest roofing manufacturer. There is no maximum slope installation. Smartvent is a tapered under shingle plastic product designed for installation. These vents are static vents that are placed over holes in the roof close to the roof ridge.

A lot of work and best if combined with a new roof. Install shingles as normal up to the base of the plumbing vent. Back to shingle vents in a minute. Perhaps the most expensive solution is shown here.

Installing a roof plumbing vent is typically an easier task than flashing a chimney. 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. Residential and commercial roofing shingles slate roof ventilation roof underlayments asphaltic and tpo roof membranes. There are a number of different types and styles of soffit vents.

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. 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. Smartvent is nail gunnable. Place the flashing or boot onto the plumbing vent so the base is resting on shingles.

Insulating over the roof. Certainteed ridge vent combined with sufficient intake vents such as certainteed intake vent are the most efficient and effective systems you can install. Soffit vents are recognizable for the narrow slits that provide open space into which air can flow. This aluminum cap is the finished product and does not require additional asphalt shingle ridge caps.

Smartvent can be installed under virtually any shingle course when proper installation techniques are used. It allows air to flow freely through the 1 roof decking slit providing more than adequate soffit ventilation to maximize ridge vent effectiveness. Smartvent should be installed on shingled roofs with a minimum 4 12 pitch. Along the soffit edge of the roof or the facing edge of dormer rakes and goes virtually unnoticed.

It s a roof top installed shingle over intake vent that can be used to supplement existing soffit or undereave vents. Momentarily lift the boot and apply sealant to hold the flashing in place.