IKO Shingle Staining and Storage: Understanding the 2015 Bulletin
Bulletin dated: April 2015
This historical IKO bulletin distinguishes processing-oil discoloration from migration of lighter asphalt compounds. It describes storage time as an important factor and notes that mixed-age stock can initially look different
IKO technical bulletin: TBR80 Shingle Staining | Product Brochure.
What this means for your roof
This historical IKO bulletin distinguishes processing-oil discoloration from migration of lighter asphalt compounds. It describes storage time as an important factor and notes that mixed-age stock can initially look different. Its discussion of ongoing research reflects 2015, not a statement about current manufacturing. Diagnose the actual stain before selecting a remedy.
A useful question for your contractor
Do the bundle dates and staining pattern support a storage-related explanation?
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: April 2015. The date shown identifies the manufacturer document used for this summary.
Read IKO: TBR80 Shingle Staining | Product Brochure
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.