A gutter-cover attachment can disturb shingles or interfere with the roof's water-shedding layers. GAF highlights problems caused by penetrations and changes to edge details.
GAF technical bulletin: Gutter covers and shingles.
What this means for your roof
A gutter-cover attachment can disturb shingles or interfere with the roof’s water-shedding layers. GAF highlights problems caused by penetrations and changes to edge details.
A useful question for your contractor
Ask how the guard will attach without compromising shingles, underlayment or drip edge.
Ask for the answer to be tied to the actual roof condition and the exact product being installed. Keep the agreed repair or installation detail with your estimate and project photos.
Bulletin revision: January 25, 2021. This is the date of the manufacturer source, not a claim that this website guide existed on that date.
Read GAF: Gutter covers and shingles
This homeowner summary explains the cited bulletin. The complete manufacturer document and current product instructions govern the installation details. A requirement for one manufacturer or product should not be transferred to another without checking.