How To Ventilate A Roof

Different forms of high and low level ventilation are used as well apart from the soffit vents and ridge vents pictured.

How to ventilate a roof.

There are two types of flat roof systems warm and cold roofs which affect the positioning of the ventilation. Warm air that escapes living space also carries moisture that will condense on rafters or roof sheathing. Fairly simple stuff fresh air in old stale air out. Grab a flashlight and inspect your attic during the winter.

Roof ventilation this picture represents what is considered to be the best way to ventilate a roof space. Hot air exhaust vents located at the peak of the roof allow hot air to escape. A ridge vent is a ventilation strip that is placed along the ridgeline of the home. Of airspace between the top of the insulation and the back of the roof sheathing.

Taking advantage of this natural process referred to as passive ventilation is the most common way to vent an attic. When thermal insulation is placed below the deck the ventilation must. Flat roof ventilation allows for the circulation of air in the property particularly for warmer rooms in residential buildings. If you see dampness or frost you need better roof ventilation and some attic vents.

Sure installing roof vents for older homes can reduce your hot air during the summer but there are probably more low risk cost effective ways to increase your home s energy. Unless you re bulk filling rafter. For the best results place roof ventilation near the roof s peak and soffit vents in the eaves. Good roof ventilation can do this but shingle color sun exposure and insulation are exponentially more important to overall energy efficiency than ventilation.

Prior to installing the ridge vent a 1 inch wide strip of roof decking is cut out along both sides of the ridgeline to allow for air movement through the vent. What is flat roof ventilation. Roof ventilation depends on the simple scientific fact that hot air rises. The code calls for a minimum of 1 in.