How To Ventilate An Attic

Help purchased home 8 years ago with 2 power attic vents.

How to ventilate an attic.

How to determine whether you need better attic ventilation. Most building codes require a ratio of 1 150 ventilation space to. In the winter warm moist air seeps into the attic from the living space below. Proper insulation and air sealing also keeps attics.

In the summer good attic ventilation reduces heat buildup. That cuts cooling costs and prolongs shingle life. Your actual living space is sealed and insulated at the attic floor the attic is outside this envelope. If there are asphalt shingles on your roof the attic must be ventilated to comply with the terms of the manufacturer s warranty.

In the winter allowing a natural flow of outdoor air to ventilate the attic helps keep it cold which reduces the potential for ice damming snow that melts off a roof from an attic that is too warm and then re freezes at the gutters causing an ice dam that can damage the roof. Before we explore how to ventilate an attic space it is prudent to understand how much ventilation is needed. The unmentioned evil of attic ventilation fans is that they often pull interior air conditioned air up from the home into the attic through the ceiling via wires pipes and other air leak penetrations. Things have been ok low energy bills house very comfortable.

Good ventilation allows the heat and moisture to escape. That keeps your attic dry and reduces. Don t avoid ventilating your attic for fear you re letting cold air into the house. Ventilation of attic spaces is required by most building codes as well as by roofing material manufacturers and the national roofing contractors association nrca.