Hot shingles soften, making them more vulnerable to scuffing, distortion and overdriven fasteners. Malarkey discusses shaded storage, flat bundles, moving work with available shade and reducing traffic on finished areas
Malarkey technical bulletin: Installation of Asphalt Shingles in Hot Weather.
What this means for your roof
Hot shingles soften, making them more vulnerable to scuffing, distortion and overdriven fasteners. Malarkey discusses shaded storage, flat bundles, moving work with available shade and reducing traffic on finished areas. It also cautions against cutting over installed roofing where the material below can be damaged.
A useful question for your contractor
Ask how the crew will protect finished slopes and adjust fastening as roof temperatures change.
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 edition: June 2026. The date shown identifies the manufacturer document used for this summary.
Read Malarkey: Installation of Asphalt Shingles in Hot Weather
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.