Aluminum Dekfast Poly Washers

When to use aluminum Dekfast washers

Aluminum Dekfast washers serve the same roofing role as the standard poly washer, sealing and holding panels in metal-to-wood and metal-to-metal fastening, in an aluminum option. They spread the screw's load across the panel, help seal the fixing point, and are sized to allow pre-drilling and thermal movement so polycarbonate skylight and sidelight panels can expand without cracking around the fastener. They pair with #12 roofing screws. As with any roofing washer, match it to your fastener and follow the panel manufacturer's fixing instructions for a long-lasting, weathertight roof.

Why choose aluminum Dekfast poly washers

• Roofing grade: durable Dekfast washer for long-lasting roof systems.
• Seals and spreads load: for metal-to-wood and metal-to-metal panels.
• Thermal movement: sized to allow panel expansion and pre-drilling.
• #12 screw fit: works with #12 roofing screws.

Common applications for aluminum Dekfast washers

• Polycarbonate skylight and sidelight panels
• Metal-to-wood roofing panel fastening
• Metal-to-metal panel installations
• Roofing systems needing thermal movement

For metal-backed bonded seals, see neoprene EPDM sealing washers, and browse every option on the main sealing and cushioning washers category.

Aluminum Dekfast Poly Washers FAQ

What is an aluminum Dekfast washer for?

It seals and spreads load in roofing panel fastening, metal-to-wood or metal-to-metal, and suits polycarbonate skylight and sidelight panels in an aluminum option.

Why does the size allow thermal movement?

The washer is sized to allow pre-drilling and let the panel move with thermal expansion, which helps prevent cracking around the fastener.

What screws does it work with?

#12 roofing screws. Follow the panel manufacturer's fixing instructions for best results.