Under Roof Air Flow System

Air flows in through the soffit vents and out through the roof vents.

Under roof air flow system.

Hot air exhaust vents located at the peak of the roof allow hot air to escape. In cool or cold weather conditions scientists confirmed that direct nailed asphalt shingle roofs had significantly larger heat loss than attics with metal shakes and above sheathing ventilation. As a homeowner it is important that you review the soffit areas of the home for soffit vents. Metal roof coatings with solar reflectance can help building owners save substantially in annual cooling costs.

The early to mid 20th century saw the development of this concept. The term refers to a system which allows air to flow through the intake and exhaust. We chose rectangular hooded roofing vents and rectangular soffit vents because they re easy to install. Research has confirmed that creating an air space under a metal roofing system will increase energy savings during both summer and winter months.

It is important that air movement occurs and is not impeded by any framing members of the home. Vents come in various styles. And a correctly designed system will precisely balance the intake and exhaust ventilation under the roof so that the attic is slightly pressurized preventing conditioned air from being sucked out too quickly through the vents thus increasing heating and cooling costs. Effective attic ventilation systems reduce damaging heat and moisture in your attic promote energy efficiency by helping to reduce the load on your air conditioner in the summer and also reduce the risk of ice dam formation on your roof.

A new roof is more than just shingles. Big organizations like the forest products laboratory and even the american society of heating refrigerating air conditioning engineers realized that poor roof ventilation systems could cause condensation problems in a building. Intake vents located at the lowest part of the roof under the eaves allow cool air to enter the attic. An important part of installing any system of ventilation into your roof system is to make sure that there is a point of entry and a point of exit for airflow.

The roof design should provide plenty of air space for insulation and air flow under the roof and eaves. When stale overheated air in your home or attic is vented out and fresh air is pulled in you have an air exchange effective ventilation requires a balancing act.