In cool or cold weather, moisture laden air drawn into the attic or roof cavity will leave its moisture as condensation on the roof deck underside or in the attic or roof insulation.Ĥ Venting Solutions for Roofs with No Overhang or Soffit Will occur for the same reasons just described. Increased risk of attic or roof cavity condensation, mold, or insect damage.That's because warm air leaks and heat lost into the attic or roof cavity will create a building up-draft of air movement that, unsatisfied by a ready source of makeup or intake air from outside, will draw conditioned air out of the occupied building space instead. Will occur in heating climates if roof exit venting is provided with no eaves or intake venting.
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