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Attic Ventilation

Attic Ventilation -St. Louis RoofingProper attic ventilation is an important part of any roofing system and allows for a continual flow of outside air through the attic space of your home. Proper ventilation of the attic protects the efficiency of  your insulation and assist’s in lowering the temperatures in your living space in the summer while retaining heat in the winter.

A properly ventilated attic will maintain a balance between air intake (at your eaves or soffits) and air exhaust ( at or near the roof ridge line).

The Federal Housing Authority (U.S. FHA) recommends  at least a minimum of 1 square foot of attic ventilation (intake and exhaust) for every 3oo square feet of attic flooring space. For example if your attic floor is 1200 square feet, you’ll need a total of 4 square feet of ventilation. This amount should be divided equally between both intake and exhaust ventilation to insure proper air flow through the entire attic space.

Proper attic ventilation not only helps extend the service life of your roofing system, its also important in preventing the formation of ice dams on your roof during extended cold periods during the winter months.

Attic Ventilation is Essential

During the summer proper attic ventilation will help prevent heat buildup, which will reduce air conditioning costs but will also help make living areas cooler and more comfortable.  All major shingles manufacturers require attic ventilation to validate their material and product warranties and as such we take an active approach by ensuring your new roof had the proper amount of ventilation in your attic.

In winter months attic ventilation will assist in preventing moisture build up, which helps wood rot, mold, mildew, and poor overall air quality inside your home.

Attic Ventilation – Ridge Vent

Ridge ventilation systems are the most efficient exhaust vent for your attic. A ridge vent is installed at the very peak of your roof and is the best way to provide consistent exhaust ventilation for your attic and roofing system, provided there is sufficient horizontal ridge length. Our trained roofing professionals can determine if you have enough lineal feet of ridge to determine if a ridge ventilation system for your attic is sufficient or not.

Attic Ventilation – Don’t Mix Different Types

Having more then one type of attic ventilation products or systems on a roof is a very common problem and mistake that we see when evaluating your home for a new roof. For example, having ridge vents installed with regular attic vents, gable vents or power vents can do more harm then good and will actually short circuit your attic ventilation.

When your attic ventilation is being short circuited it causes the air flow to take the path of least resistance and that could mean that are flow can reverse and go out through your soffit area instead of out the top where your roof peak is. In some cases air flow may enter through one side of your ridge and right out the other side which only circulates area at the peak of your attic space instead of getting air flow from the bottom or eve line all the way up through the ridge or peak area.

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