Owens Corning provides options for removing old self-adhered membrane, replacing affected sheathing or using a defined retained-layer detail. The retained-layer option is restricted and does not apply to the named Platinum or Preferred extended warranties
Owens Corning technical bulletin: Re-Roofing Over Existing Layer of S.A. FOR Ice-Dam Protection Tech Bulletin.
What this means for your roof
Owens Corning provides options for removing old self-adhered membrane, replacing affected sheathing or using a defined retained-layer detail. The retained-layer option is restricted and does not apply to the named Platinum or Preferred extended warranties. This is a different situation from a membrane used only as a general secondary barrier.
A useful question for your contractor
Ask whether ice-dam protection is required and which option meets the warranty level included in your estimate.
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: February 2026. The date shown identifies the manufacturer document used for this summary.
Read Owens Corning: Re-Roofing Over Existing Layer of S.A. FOR Ice-Dam Protection Tech 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.