Insulating A Roof Ventilation

To meet all three goals insulating your finished attic ventilating the roof and maximizing headroom use a combination of dense batt insulation rigid foam sheeting and air chutes.

Insulating a roof ventilation.

This approach is especially prevalent in retrofits when the existing roof is in good shape but the attic is being conditioned. An important part of installing any system of ventilation into your roof system is to make sure that there is a point of entry and a point of exit for airflow. The airflow from the soffits to the ridge vent keeps the roof cool and prevents ice dams and the material will block that flow. Air can move through the attic space freely and the floor of the attic is insulated to thermally separate the unconditioned attic from the living spaces below.

Covering up the soffit vents with loose fill or batts which can happen if you stuff insulation along the eaves is a huge no no. Rafter vents or insulation baffles install in any rafter space to create narrow gaps that direct fresh air from the soffit vents to the peak of the roof. Most codes require a specified minimum amount of headroom and it s tough to meet this requirement when insulating a finished attic especially since most. In warm climates zones 1 through 4 low density open cell spray foam insulation is the typical choice since it is vapor permeable and will allow drying of the exterior sheathing and roof framing if they happen to get wet via diffusion into the interior of the building.

Insulate below the roof the most conventional approach to insulating a roof is to put all the insulation below the roof deck. For the same reason insulation shouldn t touch the roof s underside. These specialty vents do not affect the.