Heat can make a membrane's adhesive more aggressive and its release film harder to remove. Malarkey emphasizes shaded storage, upright rolls, manageable application and proper rolling after placement
Malarkey technical bulletin: Installation of Self-Adhering Membranes in Hot Weather.
What this means for your roof
Heat can make a membrane’s adhesive more aggressive and its release film harder to remove. Malarkey emphasizes shaded storage, upright rolls, manageable application and proper rolling after placement. Difficulty separating the film should be handled with the manufacturer’s method rather than stretching or damaging the waterproofing sheet.
A useful question for your contractor
Ask how the crew will keep rolls cool and check adhesion and membrane condition before covering the installation.
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: July 2026. The date shown identifies the manufacturer document used for this summary.
Read Malarkey: Installation of Self-Adhering Membranes 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.
Discuss your roof with Barnes N’ Roofs
Cover image: Malarkey, from the linked manufacturer bulletin. Read the complete source for the full detail and its limitations.