Get matched with top attic or whole house fan installers in your area

A properly installed ridge vent rarely leaks. Sections overlap along the roof’s peak and are secured with fasteners designed to form a watertight seal. When your roofer follows the manufacturer’s instructions and uses compatible materials, rainwater stays outside while warm, humid air escapes. Regular inspections after major storms add extra peace of mind and help your roof last longer.

Divide your attic’s square footage by 150 to find the minimum square footage of ventilation you need. Aim for a 50/50 split—half intake (soffit) and half exhaust (ridge or roof) vents—to keep air moving and moisture in check. A local roofer can confirm the calculation based on your climate and roof pitch.

Roof ventilation moves hot, moist air out of the attic, protecting rafters and decking from mold, rot, and premature wear. Good airflow also eases the load on your air-conditioning system, trimming energy bills and keeping living spaces more comfortable year-round. In short, it safeguards both your roof and your wallet.

A ridge vent should run along the main roof ridge, but doesn’t have to cover every intersecting ridge. What matters is creating a continuous channel at the highest point so warm air can escape evenly. Your roofer will measure the attic space, size the vent accordingly, and stop short of hips or valleys where leaks are more likely. This approach keeps the system efficient and the roof watertight.