"Carpenter's gap" above fascia for attic venting. - GreenBuildingAdvisor
About this article
Mid-century houses used a “carpenter’s gap” above the eave’s fascia board for the lower attic vent. The asphalt shingles and starter course extend over it to direct rainwater into the […]
“Carpenter’s gap” above fascia for attic venting. ken_jensen | Posted in GBA Pro Help on March 30, 2026 11:11am Mid-century houses used a “carpenter’s gap” above the eave’s fascia board for the lower attic vent. The asphalt shingles and starter course extend over it to direct rainwater into the gutter and intake air can be induced under the shingle overhang into the attic and out the upper attic vents. The questions during roofing replacement while keeping the gap and the gutters are: How can mice and bugs be screened along this gap? How can the shingles be supported at the necessary overhang? Does a product exist to support the roofing edge and screen the gap?Many thanks! Answer GBA Detail Library A collection of one thousand construction details organized by climate and house part Search and download construction details Join the leading community of building science experts Become a GBA Prime member and get instant access to the latest developments in green building, research, and reports from the field. Start free trial Related Questions attic venting - oft-missed code requirement? Gap between fascia and roof sheathing - need sealing? Below grade wall to above grade wall transition - gap? 1941 house with brick veneer, no soffit, and fascia-roof deck gaps Replies Expert Member MALCOLM TAYLOR | Mar 30, 2026 11:23am | #1 Ken, It’s a really bad location for an intake vent. The vulnerable intersection of the roof and fascia often sees moisture damage, which is why it ...
