Insulating And Ventilating An Attic

Ventilation of attic spaces is required by most building codes as well as by roofing material manufacturers and the national roofing contractors association nrca.

Insulating and ventilating an attic.

In order to facilitate this exchange of warm and cool air the general rule of thumb suggests installing at least 1 sq. Before we explore how to ventilate an attic space it is prudent to understand how much ventilation is needed. Ventilating your home prevents moisture odors and indoor air pollutants from building up. The main factors that impact the cost are.

The insulation will resist heat transfer into the house. Of vent for every 300 sq. Proper insulation and air sealing also keeps attics cold in winter by blocking the entry of heat and moist air from below. Insulating and air sealing your attic is one of the best things you can do for your home.

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. That means air can t flow from the soffit vents to the roof vents. Keep the following things in mind as you start this project. Consider installing continuous ventilation as a part of this project.

If your attic is well insulated the insulation might be plugging the spaces between rafters just above exterior walls. Contractor or insulation installer s fee. Type and material of your insulation. Most building codes require a ratio of 1 150 ventilation space to attic floor space.

Building codes vary. The solution is to add baffles which allow air to flow past the insulation photo 9. Square footage of your attic.