Owens Corning changed Duration color blends and shingle length in 2012. The bulletin advises against mixing the newer shingles with the older version and discusses special fit considerations in limited repairs
Owens Corning technical bulletin: Mixing Duration Technical Bulletin.
What this means for your roof
Owens Corning changed Duration color blends and shingle length in 2012. The bulletin advises against mixing the newer shingles with the older version and discusses special fit considerations in limited repairs. A matching product-family name does not establish a dimensional or visual match.
A useful question for your contractor
Ask for the older shingle generation to be identified before approving replacement material.
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 2023. The date shown identifies the manufacturer document used for this summary.
Read Owens Corning: Mixing Duration Technical 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.