Attic Vent Holes

Calculate or enter the square footage of the attic or area to be vented.

Attic vent holes.

Photos 1 6 show how it s done. 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. 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.

It s one of the more common places bees enter in order to build their hives. Unlike box vents which are square off ridge vents are usually much longer and thinner. 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.

Hardware cloth is fairly rigid mesh with heavy gauge wire that is not easily damaged by animals. Intake vents located at the lowest part of the roof under the eaves allow cool. In other words the entire vent opening doesn t count as vented space. But before you cut any holes plan the locations of the attic vents.

Power gable vent shutter is automatic 20 in. Buy hardware cloth with 1 8 inch or 1 4 inch openings. 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. 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.

Mark the roof venting locations from the attic where you can see the rafters and avoid placing roofing vents over them. Power gable vent shutter is designed to be used with master flow egv pg series electric gable fans. This will keep out pests without restricting airflow through the vent holes. 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.

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. Adding attic vents is a simple matter of cutting holes and installing vents. These vents are static vents that are placed over holes in the roof close to the roof ridge. 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.

It comes on an easy to install flexible mesh roll and is hand nailable with no complicated fitting wrapping nail gun adapters. Many people mistake off ridge vents for box vents and while they are very similar in their functions they do have some differences.