Joist & Flashing Tape by Deckorators

Contractor Rebates
(2 reviews) Write a Review
$16.99 - $29.99
5.00 LBS
Calculated at Checkout

Joist & Flashing Tape by Deckorators

Extend the life of your wood or composite deck with easy-to-install protective joist tape. Made of butyl rubber, this tape creates a waterproof membrane that prevents wood rot and decay caused by humidity and moisture. Seals around screws and nails blocking water into your deck lumber, and when placed between wood and metal surfaces it eliminates corrosion potential. Rolls measure 1-5/8-in  or 3-5/8-in x 50-ft. Protect and maximize the life of your deck by using joist and flashing tape on a wood or composite deck's substructure.


  • Available Sizes: 1-5/8 in. x 50 ft. (for single-Joist) and 3-1/8 in. x 50 ft. (for double-Joist/beam) 
  • Can be applied to the top of joists, rim joists, and ledgers to protect wood against water damage
  • Increases the holding power of deck screws
  • Acts as a barrier to protect screw holes from moisture
  • Ideal for both wood and composite deck understructures for which we recommend using ProWood® professional grade treated lumber

2 Reviews Hide Reviews Show Reviews

  • 4
    Good tape

    Posted by Tommy on Jul 25 2022

    The tape is nice and thick, easy to use and VERY sticky. If you stick it down, don't expect to be able to peel it up with any ease. My two gripes are that the double wide roll should be about 1/8" wider to allow for a little (very little) overhang on each side of the joist top. Second, if you need to walk on the joist after the tape is down, it gets marred pretty easily, so then you have to go stick a small piece back over it.

  • 5
    Deck tape

    Posted by Al on Sep 14 2021

    The tape goes on easy, sticks very well and fits perfectly on top of joists. Our deck is over 2000sf so we used 34 rolls. Great price too.

US Flag
Deck Expressions Decking Supplies