Attic Ventilation Assessment

What This Service Involves

Balanced ventilation is what keeps a Pacific Northwest attic dry, and our assessment measures whether your soffit intake and ridge or roof-top exhaust are actually working together. We calculate net free vent area against your attic square footage and look for the blocked soffits, painted-over vents, and missing baffles that quietly trap humid air. Because so many local homes were built or remodeled with unbalanced venting, we flag mismatches that lead to condensation and premature shingle aging. You receive specific numbers and a plan to correct any shortfall.

Benefits

Confirms your attic meets the airflow ratio needed for our wet climate; Pinpoints blocked soffits and baffles restricting fresh intake; Reduces condensation that shortens shingle and decking life; Improves summer temperature control and lowers cooling strain; Gives you a data-backed venting plan instead of guesswork

Our Process

1) Measure attic square footage and calculate required net free vent area; 2) Locate and test all intake and exhaust vents for actual airflow; 3) Identify blockages, imbalances, and missing baffles; 4) Recommend a corrected intake-to-exhaust configuration with sizing

What Affects the Cost

Attic footprint and roof geometry that dictate vent quantity; Current vent types and how much retrofit work is required; Accessibility of soffits and ridgelines for measurement; Whether powered or passive solutions are being compared; Complexity of homes with multiple rooflines or dormers

Best Time of Year

Best performed in spring or fall before extreme temperatures, so corrections are ready ahead of summer heat and winter dampness.