California Attic Ventilation

California title 24 part 6 references ashrae standard 62 2 2007 as california s state ventilation code with one exception.

California attic ventilation.

That is openings doors windows and louvers to the outside should create a natural flow of fresh. Operable windows are excluded from the options for meeting whole building ventilation requirements. The insulation will resist heat transfer into the house. Authority for regulating ventilation in buildings is left up to each state and usually that authority is delegated to local jurisdictions counties and cities.

A code may require that a standard be met. To lower attic temperatures and to remove excess moisture. In the summer natural air flow in a well vented attic moves super heated air out of the attic protecting roof shingles and removing moisture. Replacing your bathroom fan range hood or even installing a new fan.

Vents attic and crawl space vents are incorporated into buildings to help remove excess moisture that can move into these spaces either from the soil in the case of a crawl space or from the living space in the case of attics and cathedral ceilings. Attic ventilation estimating tool. Proper attic ventilation can help reduce the load on your air conditioner. Table 402 1 minimum ventilation rates in breathing zone 1 2 4 ashrae 62 1.

If your attic is enclosed california s building code states it should have cross ventilation. Attic ventilation serves two main functions. Ventilation air supply requirements for occupancies regulated by the california energy commission are found in the california energy code. See the benefits of attic ventilation get automatic lifetime protection on your entire gaf roofing system when you install any gaf lifetime shingle and at least 3 qualifying gaf accessories you ll automatically get a lifetime limited warranty on your shingles and all qualifying gaf accessories.

Proper insulation and air sealing also keeps attics cold in winter by blocking the entry of heat and moist air from below. Get started indoor air quality iaq poor indoor air quality can have a negative effect on your home. To calculate the amount of ventilation you need for your home visit gaf s ventilation calculator now. The uniform building code requires enclosed attic spaces enclosed rafter spaces and under floor areas to be ventilated by not less than 1 square foot for each 150 square feet of attic under floor area.