A bump can involve a raised fastener, but the fastener and surrounding shingle need inspection before a repair is selected.
A nail pop is a raised fastener that may lift or damage the shingle above it. It does not automatically require a new roof, but the location needs inspection before someone simply drives the fastener back down.
IKO's raised-nail bulletin recognizes that lifted nails can create bumps and that the appropriate correction depends on the affected shingle. Use the selected manufacturer's repair guidance for the actual roof.
What should the inspector check?
Ask whether the bump is actually caused by a fastener, whether the overlying shingle is punctured or otherwise damaged, and what condition exists below. A photograph of the bump is a starting observation, not proof of the entire cause.
The scope should identify how the fastener issue and any damaged covering will be corrected together. If similar bumps appear across several areas, ask the contractor to map their distribution and explain whether a broader installation or substrate investigation is appropriate. One location and fifty locations are different evidence.
Make the repair traceable
For example, a useful record identifies the front slope near a specific penetration, shows the lifted area, and documents the correction and any replacement shingle. “Hammered nails” on an invoice provides much less information.
Do not climb the roof or step on the bump to test it. Provide ground photographs and any leak history, then let the contractor assess the component safely. Ask whether matching material is available and whether the surrounding shingles can be disturbed without creating additional damage.
Request a repair assessment. If replacement is recommended, ask which additional findings support it beyond the raised fastener itself.
Common questions
Frequently asked
No. Identify the cause, damaged components, and extent. A localized condition is different from widespread installation or substrate problems.
Published by
Editorial team
Our editorial team publishes homeowner guides with sources linked in the article. For a recommendation about your roof, request an inspection of the property.
