Atlas Flood-Submerged Shingles: Do Not Treat Them as New Stock
Bulletin date: not stated in source
Atlas advises against selling shingles that have been submerged in floodwater. The bulletin identifies possible effects on sealant, granule adhesion and other performance properties, even where damage is not immediately visible
Atlas technical bulletin: Shingles Submerged in Flood Waters - Atlas.
What this means for your roof
Atlas advises against selling shingles that have been submerged in floodwater. The bulletin identifies possible effects on sealant, granule adhesion and other performance properties, even where damage is not immediately visible. Documenting material storage conditions matters when evaluating affected inventory.
A useful question for your contractor
Were any bundles submerged or exposed to contaminated floodwater before delivery?
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: not stated in source. The date shown identifies the manufacturer document used for this summary.
Read Atlas: Shingles Submerged in Flood Waters - Atlas
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.