certainly, cut them 12" wide
A shingled roof requires ventilation. That can be done several ways. Gable vents, turbine vents, air hawks or ridge vent. It is also important that your soffits are vented to get proper airflow.
15 lb felt, 1 1/2'' plastic caps , 20" valley metal, 1 1/4" nails, Ridge vent, 2 1/2" ridge nails, feild shingles, 3 tab shingles (for starters and ridge), air hawks & white drip edge.
To seal the ridge from weather. If a ridge vent is used it is just that, a vent for the roof.
To fix a leaking ridge roof vent, first ensure safety by using a sturdy ladder to access the roof. Inspect the vent for damaged flashing or seals, and replace or repair them as needed. Additionally, check for any cracked or missing shingles around the vent area and replace them to prevent further leaks. Finally, apply roofing sealant around the edges of the vent to create a watertight seal.
When talking about the area of a roof, remember that it is not the same as the square footage of the structure. For example a 20 x 30' building with a 12" overhang and a 4/12 pitch will have 736 sq ft of roof vs only 600 sq ft of slab. One square of shingles covers 100 square feet. 15 year shingles come 3 bundles to a square. 25 year come 4 bundles to a square. The ridge vent will vary with each job. They are 4' each.
To ensure proper ventilation in your attic by installing a ridge vent, you need to first measure the length of your roof ridge and then choose a ridge vent that matches that length. Next, you will need to cut a slot along the peak of your roof to install the ridge vent. This will allow hot air to escape from the attic, while cooler air is drawn in through the soffit vents. Proper installation is key to ensuring effective ventilation in your attic.
Rake overhangs are not as critical to vent as are the rafter spaces above the living areas, but for the sake of appearance, the entire ridge is usually covered with venting.
ridge vent and powered
For installing shingles over a ridge vent, it's recommended to use 1 1/4-inch to 1 3/4-inch roofing nails. The nails should be long enough to securely penetrate both the shingle and the underlying roof deck, ensuring a tight seal. It's important to use galvanized or stainless steel nails to prevent rust and ensure durability. Always follow the manufacturer’s recommendations for the best results.
WHICH VENT If you're talking plumbing roof vents or soffit or ridge attic air vents; absolutely not!! I can't thing of a single vent that would be opened and closed at will.
Yes, you can install a ridge vent when re-roofing, even if you have large gable vents and no soffit vents. However, for optimal performance, it's recommended to have balanced ventilation, which means pairing the ridge vent with soffit vents. This setup helps create a continuous airflow, allowing hot air to escape efficiently from the attic. If you choose to install the ridge vent alone, ensure that your attic has sufficient airflow to prevent moisture buildup and overheating.
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