Proper Way To Ventilate An Attic

Add weatherstripping around the perimeter and a sweep to the door of a walk up attic.

Proper way to ventilate an attic.

Hot air exhaust vents located at the peak of the roof allow hot air to escape. One last thought attic ventilation is not there to get rid of heat it is there to get rid of excess moisture accumulating from the home. Ventilation of attic spaces is required by most building codes as well as by roofing material manufacturers and the national roofing contractors association nrca. Once they are in place you can then place the batts or blankets or blow insulation right out to the very edge of the attic floor.

Best ventilation is open soffit venting to a open vented ridge vent. Rafter vents should be placed in your attic ceiling in between the rafters at the point where your attic ceiling meets your attic floor. Most building codes require a ratio of 1 150 ventilation space to attic floor space. Homes are naturally filled with warm moist air on a daily basis thanks to human physiology and activities such as cooking and showering.

Danny says if you cannot access it from the attic space the only way to provide the necessary venting is to actually cut a hole in the roof to gain access certainly an extreme measure but the only way i would know to be able to accomplish that. Insulation at least r 38 or more is there for heating and cooling. If your home is fitted solely with small gable end vents or a ventilator high in the roof you might want to consider adding soffit vents to increase airflow. Pull down stair or ladder.

Before we explore how to ventilate an attic space it is prudent to understand how much ventilation is needed. Then aim for about 1 sq. These vents allow outside air to enter the attic at the lowest point of the roof along the underside of the eave. Ventilation can be accomplished using various products and techniques.

Attic for example has an area of 1 200 sq. In of vent opening per 150 sq. First determine your attic area by multiplying the length by the width. Intake vents located at the lowest part of the roof under the eaves allow cool air to enter the attic.

Ridge vent must me installed per the manufactures instructions. Attic hatch or door. It can do both. 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.

The most popular way to ventilate an attic is to take advantage of buoyancy or warm moist air s natural tendency to rise especially when pushed by cold air beneath it. A 30 x 40 ft. How many vents do you need.