Polyanchor SU is a lightweight, nailable synthetic roof underlayment designed to protect the roof deck. Polyanchor SU is stronger than traditional felts for improved wind resistance, durability through heavy foot traffic and adverse weather conditions.
Polyanchor SU’s non-woven fiber surface top surface and polymeric coated bottom surface provides enhanced walkability.
Polyanchor SU is ideally suited for asphalt shingles, synthetic shingles, and cedar shake roof covering systems. Polyanchor SU is preferably matched with Polystick IR-Xe installed on the eaves and valleys for ice and water protection.
Typical Applications
• Water-resistant barrier on steep slope roofing under asphalt shingles, synthetic shingles,
and cedar shakes roof coverings
• Nailable steep slope underlayment over approved wood decks for temporary
waterproofing protection
• Used in conjunction with Polystick IR-Xe self-adhered shingle underlayment for greater ice
and water protection at eaves and valleys
Features and Benefits
• Improved tear strength and wind uplift resistance compared to felts
• Enhanced deck grip and walkability
• 90-day UV resistance
• Lightweight, 10 square roll provides quick roof coverage
