Purlin Tape 24mm x 20m Roll

The Purlin Tape 24mm x 20m is a single-sided adhesive foam tape that sits between your polycarbonate sheet and the frame. Polycarbonate expands and contracts with every change in temperature, and without a buffer that movement against a timber or metal rafter produces creaking, clicking and chattering noises that carry through the roof. This tape is the simplest fix for that problem.

Apply the tape along the top of the rafters or purlins before laying the sheet. The foam gives the sheet a soft, low-friction surface to move over as it expands and contracts, so the frame noise disappears. The 24mm width suits the flat top of a standard rafter or purlin.

There is a second benefit beyond the noise. The foam acts as a thermal break, stopping the sheet sitting directly on a dark, heat-absorbing rafter. That reduces localised heat build-up under the sheet, which can otherwise lead to stress-crazing of the polycarbonate over time.

Key Features

• Single-sided adhesive foam that sticks to the frame
• Stops creaking and chattering from thermal movement
• Acts as a thermal break between sheet and frame
• 24mm wide, sized for standard rafters and purlins
• 20m roll for a full roof run
• Easy to apply, no special tools

Specifications

Applications

• Under EZ Glaze, multiwall and corrugated polycarbonate sheets
• On rafters and purlins for pergolas, patios and verandas
• Wherever a sheet sits directly on a timber or metal frame

What You Need To Complete The Job

Lay the tape along the frame, then fix the sheet with the correct screws for your substrate, such as the timber screws or metal screws for EZ Glaze. The tape and the full fixing range are in the EZ Glaze category.

Frequently Asked Questions

Why does polycarbonate make noise on the frame?

Polycarbonate expands and contracts noticeably with temperature. As the sheet moves against a timber or metal rafter, the friction and movement produce creaking and clicking sounds. The tape provides a soft buffer between the two, so the sheet glides instead of grinding.

Which side of the tape goes on the frame?

The adhesive side goes down onto the rafter or purlin, and the foam side faces up toward the sheet. Peel the backing, press the tape along the top of the frame, and lay the sheet over it.

How much tape do I need?

A 20m roll covers roughly the rafter length of a small to medium pergola or veranda. Measure the total length of frame the sheets will sit on to confirm you have enough before you start.

Does the tape work on both timber and metal frames?

Yes. The adhesive sticks to clean timber and metal surfaces alike, and the foam buffers the sheet either way. Wipe the frame surface clean before applying for the strongest bond.

Is the tape just for noise, or does it protect the sheet too?

Both. It removes the noise, and it also acts as a thermal break so the sheet does not sit directly on a heat-absorbing rafter. That reduces localised heat build-up and the risk of stress-crazing in the polycarbonate.