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Lifted Asphalt Shingle Tab: Cement It Down or Replace the Shingle?
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I’m comparing two repair options for a lifted tab on an approximately 10-year-old architectural asphalt shingle roof. The tab is still present and appears intact, with no obvious crack or major granule loss, but it lifted during recent windy weather. The roof has a moderate pitch and gets fairly direct wind exposure.
Option one is to apply compatible roofing cement beneath the tab, press it flat, and seal the exposed edge. That seems reasonable as a temporary repair if the tab is flexible and the adhesive strip has simply released. My concern is that cement alone may not provide dependable wind resistance, especially if the shingle has been bent sharply or the roof has more years of service behind it.
Option two is to replace the entire shingle. Matching replacement shingles may be available, although color variation on a 10-year-old roof is likely. Replacement seems preferable if the tab is creased, cracked, brittle, or missing substantial granules, or if there’s concealed damage around the fasteners.
For those who inspect or repair roofs, where do you draw the line? Would you re-adhere an intact lifted tab on a moderately pitched roof, or replace the shingle whenever matching material is available? Also, would recent high winds change your choice because nearby tabs or the adhesive strip may already be compromised?
1 reply
At 10 years old, I wouldn’t decide based only on whether the tab looks intact. Lift it carefully and check two things first:
- Is the original factory seal strip still tacky, or is it dusty, brittle, and no longer bonding?
- Are any nails lifted, loose, or sitting in a shingle that moves with the deck?
If the fasteners and surrounding shingle are solid and the tab has only released from the seal strip, compatible roofing cement under the tab is a reasonable repair. Use a small amount, press it flat, and avoid smearing cement across the exposed surface where it’ll collect dirt and accelerate granule loss.
If the nail area is loose, the shingle flexes around the fasteners, or the tab has a sharp crease from the wind, I’d replace the whole shingle. Cementing just the tab in that situation can hide the underlying movement and may not hold through the next windy event. A color mismatch is usually less concerning than leaving a mechanically compromised shingle in place.
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