A cone changes width as courses climb. GAF describes different approaches for flat-sided and rounded cones, including planned course lines, underlayment and sealing details
GAF technical bulletin: Basic installation of shingles on a cone roof.
What this means for your roof
A cone changes width as courses climb. GAF describes different approaches for flat-sided and rounded cones, including planned course lines, underlayment and sealing details. A standard rectangular-roof layout cannot simply be carried around the cone.
A useful question for your contractor
Ask for the layout and fastening plan for the actual roof geometry.
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: February 1, 2021. This is the date of the manufacturer source, not a claim that this website guide existed on that date.
Read GAF: Basic installation of shingles on a cone roof
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.