Of vent for every 300 sq.
Insulating and ventilating an attic.
The main factors that impact the cost are.
Keep the following things in mind as you start this project.
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.
Baffles are available at home centers.
Type and material of your insulation.
Square footage of your attic.
Contractor or insulation installer s fee.
That means air can t flow from the soffit vents to the roof vents.
Insulating and air sealing your attic is one of the best things you can do for your home.
Most building codes require a ratio of 1 150 ventilation space to attic floor space.
According to home advisor insulating your attic can cost between 1700 to 2100.
Building codes vary.
Before we explore how to ventilate an attic space it is prudent to understand how much ventilation is needed.
Ventilation of attic spaces is required by most building codes as well as by roofing material manufacturers and the national roofing contractors association nrca.
Proper insulation and air sealing also keeps attics cold in winter by blocking the entry of heat and moist air from below.
Ventilation can be accomplished using various products and techniques.
The insulation will resist heat transfer into the house.
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.