Old House Roof Ventilation

It also helps maintain good indoor air quality since stuffy humid air is continuously moved through the house into the outdoors.

Old house roof ventilation.

The most common way to add ventilation to an attic is by installing air intakes in the soffits and putting an outlet at the gable of the house. Soffit vents come in several sizes and styles including small round discs and rectangular grilles. We opted for aluminum strip vents that measure 3 in. The amount of space you devote to intake must be equal to the amount you allow for exhaust and these must be calculated according to the size of your attic and slope of your roof.

This is called passive ventilation. If you see dampness or frost you need better roof ventilation and some attic vents. A ridge vent is a ventilation strip that is placed along the ridgeline of the home. The key to proper ventilation of your roof and attic is balance.

Intake vents located at the lowest part of the roof under the eaves allow cool air to enter the attic. The building codes and building science for natural roof ventilation however only appeared in the 1940s. This creates a natural air flow by drawing in the air from outside pushing it up and out through the vent at the top of the house. Good roof ventilation can do this but shingle color sun exposure and insulation are exponentially more important to overall energy efficiency than ventilation.

Before ridge vents became standard cupolas were used to cool houses and barns. This style vent provides a quick way to ventilate every rafter bay. Vent roofs with steeples towers or cupolas can be found in different buildings from barns to cathedrals. For the best results place roof ventilation near the roof s peak and soffit vents in the eaves.

Fitted with louvers or electronically controlled windows they help draw cool air in through soffits or open windows then vent warm air from the top of the building. Strips vents come in white brown and silver. Sure installing roof vents for older homes can reduce your hot air during the summer but there are probably more low risk cost effective ways to increase your home s energy efficiency. You ll pay less than 3 for an 8 ft.

These ventilation needs are calculated differently. Hot air exhaust vents located at the peak of the roof allow hot air to escape. Prior to installing the ridge vent a 1 inch wide strip of roof decking is cut out along both sides of the ridgeline to allow for air movement through the vent. The hvac system and the roof.

It is important that air movement occurs and is not impeded by any framing members of the home. Air flows in through the soffit vents and out through the roof vents. Roof ventilation in a cold climate vents moisture and ensures a cold roof temperature to avoid ice dams. Tearing off an old roof offers the opportunity to have your roofing contractor add one of these upgrades.

Wide x 8 ft.