Your roof is more than just shingles! Here in the Butler and Cranberry areas, we have to pay attention to ventilation due to our weather changes.
Ventilation and Insulation are Key
One of the most important components in a roof system durability and life is proper ventilation. Without it, heat and moisture build up in an attic area and combine to cause rafters and sheathing to rot, shingles to buckle, and insulation to lose its effectiveness.
It is important never to block off sources of roof ventilation, such as louvers, ridge vents or soffit vents, in both winter and summer. Proper attic ventilation will help prevent structural damage caused by moisture, increase roofing material life, reduce energy consumption and enhance the comfort level of the rooms below the attic.
In addition to the free flow of air, insulation plays a key role in proper attic ventilation. An ideal attic has:
A gap-free layer of insulation on the attic floor to protect the house below from heat gain or loss
A vapor retarder under the insulation and next to the ceiling to stop moisture from rising into the attic
Enough open, vented spaces to allow air to pass in and out freely.
A minimum of 1 inch between the insulation and roof sheathing.
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