When your attic is filled with spray foam insulation to create a hot roof your attic s temperature rises because the thermal envelope is shifted to the underside of your roof because ventilation is not present.
Raised roof shingles for ventilation.
Asphalt shingles require special attention when installed on unvented roof assemblies in hot humid mixed humid and marine climates due to inward vapor drive.
To keep moisture out of the roof assembly a roofing underlayment with 1 perm or less class ii vapor retarder must be installed under the shingles.
To achieve full ventilation of the attic there must be an air inlet at the base of the roof through perforations in the eaves soffit.
Certainteed intake vent provides continuous intake airflow at the roof s edge and provides proper intake ventilation for homes with little or no overhang.
If it s a shingle over roof vent ridge cap shingles will be applied over the vent and secured with two inch nails.
Warranties on hot roofs.
The importance of proper attic ventilation while shingles are the most highly visible part of your roof ventilation is a critical component to your roofing system.
See the benefits of attic ventilation a new roof is more than just shingles.
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.
It s a roof top installed shingle over intake vent that can be used to supplement existing soffit or undereave vents.
A properly installed roofing system also depends on attic ventilation.
It comes on an easy to install flexible mesh roll and is hand nailable with no complicated fitting wrapping nail gun adapters connectors or end plugs needed.
A shingle over vent is installed over the ridge of a roof and is covered over by asphalt shingle caps that match the surrounding roof shingles.
When installed as part of a properly balanced when installed as part of a properly balanced attic ventilation system gaf cobra exhaust vent is a shingle over exhaust vent installed at the roof ridge that helps exhaust excess heat and moisture from your attic.
A self contained 4 foot sectional shingle over ridge vent designed for ventilation.
Ventilation which balances air intake and exhaust in your attic is what allows your home to breathe.
Features both an external and an internal sinewave shaped baffle designed to help guard against wind driven rain and slow infiltration.
Each section also contains integrated end plugs located every foot to reduce scrap when splicing.
Industry studies show that shingle temperature is only raised by a few degrees with a hot roof.
