deck

Buying Guide: Deck Joist Flashing

What the Flashing Does
Applied to the top of deck joists, this flashing forms a waterproof membrane that helps prevent wood rot and decay caused by water collecting under the decking boards. Use it to protect joists before you lay the deck surface.

Installation Conditions
The adhesive can be installed at temperatures down to 25 F. The tape self-seals around screws and nails. Follow the manufacturer's instructions for surface preparation and application.

Frequently Asked Questions

What does Deck make?
Deck offers self adhesive deck flashing tape in black. It is a flash barrier applied to the top of deck joists to help keep water from reaching the wood beneath the decking boards.

How do I choose the right size?
The roll is 3 inch wide and 75 foot long. Measure the top surface of your joists before ordering, and compare the width and total length you need with the size shown on the product.

Can I install it in cold weather?
Yes, within limits. The adhesive can be installed at temperatures down to 25 F. Check the manufacturer's instructions for surface and temperature guidance before you start.