Under Shingle Roof Vents

Unlike box vents which are square off ridge vents are usually much longer and thinner.

Under shingle roof vents.

A lot of work and best if combined with a new roof. It allows air to flow freely through the 1 roof decking slit providing more than adequate soffit ventilation to maximize ridge vent effectiveness. Here is how you do it. Installing a roof plumbing vent is typically an easier task than flashing a chimney.

Smartvent should be installed on shingled roofs with a minimum 4 12 pitch. Smartvent can be installed under virtually any shingle course when proper installation techniques are used. Roofing shingles and materials plus factory certified roofers including ratings from real homeowners from north america s largest roofing manufacturer. Smartvent is nail gunnable.

To install the vent the roofer slips the flange the metal lip of the vent under shingles at the upper part of the hole and rests the flange on top of the shingles at the down slope part of the hole. Place the flashing or boot onto the plumbing vent so the base is resting on shingles. 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. This is a very complicated assembly which should be attempted only by seasoned builders.

Certainteed ridge vent combined with sufficient intake vents such as certainteed intake vent are the most efficient and effective systems you can install. Residential and commercial roofing shingles slate roof ventilation roof underlayments asphaltic and tpo roof membranes. 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. Install shingles as normal up to the base of the plumbing vent.

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. 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. Insulating over the roof. These vents are static vents that are placed over holes in the roof close to the roof ridge. 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.

Momentarily lift the boot and apply sealant to hold the flashing in place. Smartvent is a tapered under shingle plastic product designed for installation. Back to shingle vents in a minute. Along the soffit edge of the roof or the facing edge of dormer rakes and goes virtually unnoticed.