![]() ![]() 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. Increased building heating or cooling cost.Should they occur, will send water running down the building wall, inviting the same problems just listed above, even in climates where freezing and ice dams do not occur. Ice dam leaks on any building but particularly buildings with no roof overhang increase the chances of water passage on or even inside the building wall, inviting mold, rot, insect damage, and wet insulation. Is likely in freezing climates if there is no under-roof ventilation. While this design offers the advantage of more light entry at the building windows (not shaded by a soffit), owners of buildings built with this design need to watch out for several problems: Building Problems When there is Roof Venting & No Soffit or Eaves Overhang In fact, providing exit venting (at a roof ridge or at gable end vents) on a building with no intake venting at the building eaves will increase the building heating costs and can also add to attic or under-roof condensation, moisture, and mold problems.īuildings such as the cape Cod shown at page top may be constructed with no roof overhang whatsoever. Problems With Roofs Lacking Any Overhang - No Soffit?ĭon't give up on providing roof intake ventilation openings just because your building was constructed with no roof overhangs. Our photo at page top shows a modern synthetic mesh type ridge vent (with modest airflow capacity) and our photo at left shows a typical installation of continuous soffit or eaves intake venting at the lower roof edges of a building. We also provide an ARTICLE INDEX for this topic, or you can try the page top or bottom SEARCH BOX as a quick way to find information you need. This building was constructed with no roof overhang, making roof intake venting tricky to obtain, and risking extra damage from ice dams or gutter overflow leaks. Our page top photo shows a cape Cod home in Poughkeepsie New York. This article describes alternatives for venting attics and cathedral ceilings by providing air intake openings at the lower edge or eaves of roofs that have no building overhang or soffit or eaves. How to Correct Inadequate Attic Venting to Stop Attic Condensation, Ice Dam Leaks, Attic Mold, & Roof Structure Damage. ![]() ![]() How to add roof intake venting at the eaves: We have no relationship with advertisers, products, or services discussed at this website. InspectAPedia tolerates no conflicts of interest. ![]()
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