Attic Insulation Ventilation

Intake vents located at the lowest part of the roof under the eaves allow cool.

Attic insulation ventilation.

Worse yet inadequate insulation is almost surely allowing moisture laden air into your attic. If your attic is well insulated the insulation might be plugging the spaces between rafters just above exterior walls. The solution is to add baffles which allow air to flow past the insulation photo 9. Insulation baffles create a channel for the air entering your soffit vents to get past the insulation and into your attic cavity.

That means air can t flow from the soffit vents to the roof vents. Unless your roofing system has insulation on the roofing deck and is designed without ventilation your furnace should not be heating your attic. The insulation will resist heat transfer into the house. Most building codes require a ratio of 1 150 ventilation space to attic floor space.

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. Diyers who want to get the job done quickly and are comfortable working with power equipment. Attics where there is existing insulation to be topped since it fills gaps and joints well. For instance attic ventilation is used widely in cold climates to evacuate the warm moist air that escapes from the living space below.

In cold climates the primary purpose of attic or roof ventilation is to maintain a cold roof temperature to control ice dams created by melting snow and to vent moisture that moves from the conditioned space to the attic ventilation acts to bypass the vapour barrier created by most roof membranes. Low clearance attics with limited headroom for maneuvering during installation. If this air lingers it can condense on the underside of the roof sheathing and rot it. We can correct these problems by installing additional soffit venting an attic fan or perhaps insulation baffles to channel the air from the soffit vents past the insulation and into the attic.

It comes on an easy to install flexible mesh roll and is hand nailable with no complicated fitting wrapping nail gun adapters connectors or end plugs needed. Attic ventilation works on the principle that heated air naturally rises primarily utilizing two types of vents. Baffles are available at home centers. Ventilation of attic spaces is required by most building codes as well as by roofing material manufacturers and the national roofing contractors association nrca.