Roof Ventilation For Vaulted Ceilings

A key benefit of venting the attic is that the approach is the same regardless of how creative your architect got with the roof.

Roof ventilation for vaulted ceilings.

When renovating an older home whose roof rafters are only 2x6 really 5 1 2 x 1 5 in dimension the available space for insulation and ventilation is limited therefore limiting the options for a combination of good under roof ventilation and high insulation r values in the cathedral ceiling. As much as regular attic ventilation is an important part of your house maintenance routine and usually easy to perform cathedral ceiling ventilation maintenance might be difficult or even impossible to do. A ridge vent features an open strip along the length of the ridge where the air that enters the soffit can escape. Proper ventilation even with the attic bypasses sealed and effective vapor retarders installed proper ventilation is essential to prevent moisture problems in cathedral ceilings.

Vaulted ceilings can be constructed by either stick framing which means attaching each joist and rafter individually or by setting roof trusses that come engineered from a truss manufacturer. Attic ventilation for cathedral and vaulted ceilings require attic baffle vents with v baffe s design you can quickly and easily retrofit cathedral and vaulted ceilings that would otherwise have been next to impossible. A balanced system of soffit and ridge ventilation provides continuous ventilation of hot moist air at the hottest point of the roof. In a vaulted roof a ridge vent serves as the outtake or exhaust vent.

As for how much insulation to use the minimum would be a 2 inch board which will get you about r 12 plus a little extra from the foil facing. It s better than having the water sandwiched between the sheathing and spray foam. Because the roof isn t in play here it doesn t matter how many hips valleys dormers or gables there are. Depending on your house interior and roof framing design cathedral ceiling ventilation can be treated as an independent or attic ventilation related condition.

Properly insulated cathedral ceiling assemblies incorporating air and vapor retarders can. In mixed climates ventilation serves either role depending on the season. The air space above the insulation will provide some relief in the event of a roof leak even without ventilation. Penetrations roof ventilation challenges common air leak points in ceilings pay special attention to penetrations in the ceiling plane particularly in cathedral ceilings.