How To Vent A Roof Without Attic

If the attic space is going to be conditioned either for living or mechanical purposes or if a home design calls for a vaulted ceiling provision r806 3 in the international residential code calls for the roof deck above the space to be vented continuously from the eave to the ridge.

How to vent a roof without attic.

Static vents come in a variety of different styles and sizes but are all non motorized vents installed near the roof ridge to allow for unobstructed flow of air from the attic. But before you cut any holes plan the locations of the attic vents. While hardly anybody agrees on the best roof ventilation system everybody agrees some roof vents do hardly any good at all. Take for example ridge vents.

If two passive vents are too close then while one vent is expelling hot attic air the other vent may actually be sucking in the same hot air that the other vent is pushing out. Vent the roof deck. These fans may be controlled by a switch or a thermostat which detects heat build up in the attic space and automatically exhausts the attic space. This is easy to accomplish in simply.

I have roof vents so i have roof ventilation. When the attic becomes part of the home to be heated and cooled open wall gable vents and roof vents are no longer feasible but the underside of the roof the sheathing and rafters can still. A vaulted roof offers open living space directly below the rafters because there are no horizontal ceiling joists. Whole house fans powered attic fans.

If you have a ridge vent you also want to make sure that the passive vents are preferably at least 25 down the roof away from the ridge vent. Although there is no separate attic to vent air circulation is still necessary. If there are more than one they are centered between the rafters and installed at regular intervals in a horizontal line along the roof. For more information on ventilation and moisture control read this article i wrote on proper attic ventilation it s my position that you should have a proper ventilation system in your attic and that you should always take the time to air seal the floor of the attic.

Even without soffit venting it is important to provide an air gap at the soffit level to help keep the roof deck dry. Adding attic vents is a simple matter of cutting holes and installing vents. Photos 1 6 show how it s done.