Roof Insulation Air Flow

In addition insulation baffles must be installed at the point where the attic floor meets the roofline to prevent the attic insulation from migrating into the cavities and restricting the airflow from the soffit vents.

Roof insulation air flow.

It is important to block these spaces. Channel air flow channel air flow is an indirect path between openings in the building envelope. Air should be tunneled from the eaves behind the insulation that is installed between the roof rafters and allowed to exit at the peak or at gable vents. Similarly in hot weather conditions warm air will infiltrate into the living are attic temperatures may reach 140ºf 60ºc and more.

Plastic cardboard and styrofoam baffles are available at home stores which can be installed between the roof sheathing and insulation to allow unobstructed air flow from the eaves to the unheated space. Insulation is used in an attic for cross ventilation to minimize potential for moisture accumulation and condensation to help energy savings and moisture control. Concrete block with mortar joints can support diffuse air flow two ways. To control these different types of air flow ensure that the building envelope is airtight.

These openings are often a space hidden from view where a wall and the roof deck interface. Traditionally insulation materials that are placed inside of an attic will require air circulation within the attic space to assist in drying excess moisture in this indoor space. Without high levels of attic or roof assembly insulation warm air will flow through the ceiling and roof to the outdoors in the winter. To counter these problems baffles are installed to keep a small space between the insulation and the roof deck.