In the summer: an improperly ventilated attic can cause heat to build in excess of 150Â°F. This superheated air eventually penetrates the ceiling insulation into the living area below.
Resulting damage: Premature aging of your roofing system (âfriedâ shingles), warping, cracking, or breaking down of wood framing, damage to siding, exterior or interior paint, and wallpaper also and higher cooling costs
In the winter: various household appliances, bathtubs, showers, and cooking vapors can contribute to excess moisture build-up. Improperly ventilated attics will allow this moisture to collect and cling to the underside of the roof. This will condense and fall, soaking the attic insulation and reducing its efficiency.
Resulting damage: Structural damage including roof deck warping and rotting of the wood frame, mildew growth and buckling of shingles and felt.