Oakridge shingle length changed in 2008, while weathering can also affect color matching. Owens Corning recommends full-slope replacement when repairing the older product and describes fit requirements when that is not possible
Owens Corning technical bulletin: Mixing Oakridge Technical Bulletin.
What this means for your roof
Oakridge shingle length changed in 2008, while weathering can also affect color matching. Owens Corning recommends full-slope replacement when repairing the older product and describes fit requirements when that is not possible. Ends must not be overlapped to compensate for a size difference.
A useful question for your contractor
Ask for a comparison of old and new dimensions and a visible color sample before repairs start.
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 Oakridge 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.