Connecting a Partial Roof Replacement at Hips and Ridges
Bulletin dated: June 2025
Owens Corning describes how new underlayment connects beneath existing shingles on neighboring slopes. The bulletin separates standard product coverage from extended warranties, which require the roofing system to cover the entire structure
Owens Corning technical bulletin: Underlayment over Hip and Ridge Technical Bulletin.
What this means for your roof
Owens Corning describes how new underlayment connects beneath existing shingles on neighboring slopes. The bulletin separates standard product coverage from extended warranties, which require the roofing system to cover the entire structure. A partial replacement needs a planned connection, not an exposed butt joint.
A useful question for your contractor
Ask how the old and new layers will overlap and which warranty applies to the partial project.
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: June 2025. The date shown identifies the manufacturer document used for this summary.
Read Owens Corning: Underlayment over Hip and Ridge 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.