IKO Shingle Blends: Why a Roof Can Show a Color Pattern
Bulletin dated: August 2015
A shingle blend combines granules of different colors and proportions. IKO explains that roof geometry can make light and dark areas form a visible pattern despite the intended random appearance
IKO technical bulletin: TBR81 Shingle Blend Appearance | Product Bulletin.
What this means for your roof
A shingle blend combines granules of different colors and proportions. IKO explains that roof geometry can make light and dark areas form a visible pattern despite the intended random appearance. A pattern alone does not establish a manufacturing defect. Compare overall appearance and bundle information before assuming the wrong color was installed.
A useful question for your contractor
Is this normal blend variation, a production mismatch, or a different condition?
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: August 2015. The date shown identifies the manufacturer document used for this summary.
Read IKO: TBR81 Shingle Blend Appearance | Product Bulletin
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.