GAF Manufacturing Dust: Let New Shingles Weather Naturally
Bulletin dated: 2021 edition
GAF describes temporary cutter dust that can obscure the color of new shingles, especially dark blends. It recommends allowing soaking rains to remove it naturally
GAF technical bulletin: Manufacturing dust on new shingles.
What this means for your roof
GAF describes temporary cutter dust that can obscure the color of new shingles, especially dark blends. It recommends allowing soaking rains to remove it naturally. Pressure washing, brushing or spraying upward from the ground can damage shingles or force water underneath. The PDF shows January 25 and February 1 revision dates within the same 2021 edition.
A useful question for your contractor
Has the appearance been identified as cutter dust before attempting any cleaning?
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 dated: 2021 edition. The date shown identifies the manufacturer document used for this summary.
Read GAF: Manufacturing dust on new 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.