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Severe ice dams, eaves to ground in Poughkeepsie NYSoffit Ventilation Specifications

How to Inspect Soffit Ventilation from the Attic

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This article explains how to spot attic ventilation defects in the soffits or building eaves, as visible from the attic or building interior.

This soffit venting discussion is part of "How to Correct Improper or Inadequate Attic or Under-Roof Ventilation in buildings", our discussion of "Attic Condensation". This article describes inspection methods and clues to detect roof venting deficiencies, insulation defects, and attic condensation problems in buildings. It describes proper roof ventilation placement, amounts, and other details.

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Inspecting the Soffit or Eaves Vent System from the Attic - look for blockage

Here is our guide to Inspecting Attic and Under-Roof Ventilation - soffit intake vent adequacy. How to Correct Inadequate Attic Venting to Stop Attic Condensation, Ice Dam Leaks, Attic Mold, & Roof Structure Damage. How to detect roof venting deficiencies, attic insulation defects, and attic condensation problems

Inspecting in the building attic, we check to be sure that there is good air flow at the lower roof edges or "eaves". Even when we see apparent vents installed outside, such as soffit vent strips or perforated soffit covering material, the venting may be blocked or otherwise inadequate.

The cost to heat and cool a building is increased and the risk of an under-roof rot or mold problem is increased as well if the roof is not properly designed and vented.

For example, installing exit venting a the ridge without installing adequate intake venting at the building eaves will increase heat loss from the building during winter months. Warm air leaking into the attic or roof cavity from the building creates a convection current of rising air in the building.

When the convection current of warm moist air leaving at the ridge vent is unable to draw dry cool outdoor air into the under-roof space at the building eaves or lower roof edges, it tends to draw more heated air out of the living space.

Look for these insulation and ventilation defects a the building eaves or lower roof edges:


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