Attic Vent Holes

In other words the entire vent opening doesn t count as vented space.

Attic vent 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. Power gable vent shutter is designed to be used with master flow egv pg series electric gable fans. Unlike box vents which are square off ridge vents are usually much longer and thinner. Power gable vent shutter is automatic 20 in.

The answer is to cover the holes with a type of metal mesh called hardware cloth. A roofer will from the attic mark a spot near the ridge of the roof he may first use nails from the attic to mark preferred spots between two rafters. This will keep out pests without restricting airflow through the vent holes. Adding attic vents is a simple matter of cutting holes and installing vents.

Calculate or enter the square footage of the attic or area to be vented. It comes on an easy to install flexible mesh roll and is hand nailable with no complicated fitting wrapping nail gun adapters. Photos 1 6 show how it s done. The shutter will open when the electric gable vent is operating.

It actually makes sense if you think about it. These vents are static vents that are placed over holes in the roof close to the roof ridge. But before you cut any holes plan the locations of the attic vents. Constructed of white aluminum that can be painted.

Many people mistake off ridge vents for box vents and while they are very similar in their functions they do have some differences. Hardware cloth is fairly rigid mesh with heavy gauge wire that is not easily damaged by animals. 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. 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.

Attic ventilation works on the principle that heated air naturally rises primarily utilizing two types of vents. Intake vents located at the lowest part of the roof under the eaves allow cool. Buy hardware cloth with 1 8 inch or 1 4 inch openings. 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.

Bees often enter homes and structures through attic ventilation holes. Mark the roof venting locations from the attic where you can see the rafters and avoid placing roofing vents over them.