Attic Vent Holes

But before you cut any holes plan the locations of the attic vents.

Attic vent holes.

Generally speaking you need a ratio of 1 300 where for every 300 square feet of ceiling space you need 1 square foot of attic ventilation. This cap features both a back draft damper and bird screen preventing outside air from entering the home and birds and small pests from entering duct work. This will keep out pests without restricting airflow through the vent holes. In other words the entire vent opening doesn t count as vented space.

Square gable vent functions as a decorative accent to your home while providing maximum attic ventilation. It s one of the more common places bees enter in order to build their hives. The rvk1a steel roof cap kit is an the rvk1a steel roof cap kit is an easy to install vent for ventilation fans bath rec room home gym etc. Photos 1 6 show how it s done.

Unlike box vents which are square off ridge vents are usually much longer and thinner. Bees often enter homes and structures through attic ventilation holes. From the roof the roofer will cut away shingles and underlayment and use a saber saw to cut a hole the same size as the diameter of the vent. Let owens corning roofing help you calculate exactly how much ventilation you will need for a healthy and balanced attic with our 4 step ventilation calculator.

Many people mistake off ridge vents for box vents and while they are very similar in their functions they do have some differences. Calculate or enter the square footage of the attic or area to be vented. That said air resistance and interference such as vent grates reduces the area of true ventilation. The answer is to cover the holes with a type of metal mesh called hardware cloth.

Once the swarm is inside the attic they can build a hive in a place that is up high usually deserted and can often go undetected by homeowners. Intake vents located at the lowest part of the roof under the eaves allow cool. Hardware cloth is fairly rigid mesh with heavy gauge wire that is not easily damaged by animals. It is compatible with 3 or 4 ductwork and includes a 3 to 4 adapter for convenience.

Its two piece design is fully compatible with all siding profiles ply gem gable vents are designed to withstand the toughest weather and retain their beauty year after year. It actually makes sense if you think about it. Attic ventilation works on the principle that heated air naturally rises primarily utilizing two types of vents. These vents are static vents that are placed over holes in the roof close to the roof ridge.

Buy hardware cloth with 1 8 inch or 1 4 inch openings. Adding attic vents is a simple matter of cutting holes and installing vents.