TAMKO's notice accepts properly installed asphalt shingles over the ZIP System roof sheathing configuration described in the document, subject to product instructions and sheathing requirements. Fire classification and code compliance still need review
TAMKO technical bulletin: Huber Engineered Woods ZIP System with Asphalt Shingles.
What this means for your roof
TAMKO’s notice accepts properly installed asphalt shingles over the ZIP System roof sheathing configuration described in the document, subject to product instructions and sheathing requirements. Fire classification and code compliance still need review. Acceptance of a deck product does not excuse deck movement or improper installation.
A useful question for your contractor
Ask which current ZIP System assembly, underlayment and fire classification are specified for your roof.
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 28, 2019. The date shown identifies the manufacturer document used for this summary.
Read TAMKO: Huber Engineered Woods ZIP System with Asphalt Shingles
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.