Proper Roof Venting For Split Entry Ranch

Proper roof ventilation is an important aspect of home construction.

Proper roof venting for split entry ranch.

Typically 2 1 soffit ridge net free vent area. If you choose to vent the roof deck then be serious about it and really vent it building scientist dr. Mark attic roof air vent locations. A ridge vent is a ventilation strip that is placed along the ridgeline of the home.

Of airspace between the top of the insulation and the back of the roof sheathing. Roof ventilation depends on the simple scientific fact that hot air rises. 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 code calls for a minimum of 1 in.

If you don t have soffits or your roof style doesn t allow for soffit vents some homeowners will consider a drip edge vent. For best performance the airspace in the vent chute should be a minimum of 2 in. Drive nails up through the sheathing and shingles to mark roof air vent locations. How to install roof vents.

Drip edge vents are a two in one installation that promote water shedding at the eaves and rakes of a roof while also allowing for ventilation into the attic. The code calls for a minimum of 1 in. From the roof s peak. 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.

Hot air beneath the metal needs an escape route near the top of the roof and intake vents at the bottom of the roof. Our page top illustration adapted and edited from carson dunlop associates a toronto home inspection firm explains that to avoid un wanted air movement from the occupied space into the attic or under roof space it is important to have the proper ration of soffit or eaves intake venting to ridge or roof top outlet venting. Roof vents help make a home more energy efficient and allow humidity and hot air to escape the. It is important that air movement occurs and is not impeded by any framing members of the home.

See the benefits of attic ventilation a new roof is more than just shingles. Of airspace between the top of the insulation and the back of the roof sheathing. Center nails between rafters 18 in. Unless you re bulk filling rafter bays between 2 10 or 2 8 rafters with closed cell spray foam this approach will likely require you to fur out the rafters to accommodate additional insulation to achieve desired r values.