CofairDFB375 Deck Flash Barrier 3"x75' (Fоur Расk)

This tape is necessary when building decks to prevent water from collecting on top of joists and causing rot. Very thick, cushiony and sticky as needed. Easy to use. Effective Best tape found.Even in our dry climate, deck joists without joist tape on top developed rot which compromised structural integrity over the years. No outdoor deck should be built without it!

I installed this Saturday morning in Wash DC. Temperature was about 50F. The stuff is great. I bought a seam roller like someone recommended and I never used it. A pair of gloves were enough to put pressure on the tape and wrap around the joist. Tape is wide enough to cover a double joist. Stuff is very durable. I was sliding a 2 x 10 on the taped joist as I installed the deck board, no damage at all. No problems like the others. I'd recommend you cut the piece to length and then pull backing off rather than roll and pull off backing at the same time. I have an 8 x 30 deck. Just cut 8' pieces and then run the 30' piece. Two rolls of tape installed with two people in about 30 minutes.

It's OK WRT installing. Honestly, it does not stick very well out of the box. And you might think that's a deal breaker. But, with just a little heat from a heat gun, it sticks great. My process is to cut it to length, peal the backing as I affix it to the top of the joist and then go back with the heat gun to warm it and push it down to the top and over the sides of the joist. It would be nicer to not have to use the heat gun, but it's not that bad of a process either.It seems like it will perform well. It's rather tough. IOW, it's not something that's going to fall apart immediately. Whether it actually performs well is a something I'll know in 10 to 20 years. I'll get back to you on that :)FYI, I tried both this and the DeckWise competitor. They seem EXACTLY the same. From the packaging I'd say they come from the same factory. And, this product (cofair) is WAY cheaper.

Easy to work with, easy to peel the backing off of, stuck well to my joists. Many people complained in their reviews that the stuff did not seem tacky enough. I could imagine this being a problem if the weather was cooler. When I applied it, it was in the 70s and 80s. A hand roller did come in handy to get it to stick to the sides of the joists, but I don't feel that it was absolutely necessary.

Was not sure that joist tape was worth the cost and effort, but now that I've used it I think it was a good choice. It sticks well on new wood. We reused some older joists and it does not stick well on older wood with debris on it. I used a few staples to hold in place. The tape is sturdy and tough but easy to cut with a razor knife. Paper backing comes off easily. I read about it buckling but we had no issues with that.

Did a re-deck job on my house and pulled the old boards off and saw the deck joists were stable but needed a little protection. I actually cut this roll in half and did my entire 12x14 deck with about 1' leftover. Won't need to buy again. I originally thought to myself the joists would need something since I'm replacing the deck boards the joists must be worse for wear and did an amazon search for joist protection and this showed up. Glad it did, saved money cutting it in half and it rained after putting just the protector on with no deck boards and the water beaded right up on it. It's more like a tar tape than just tape, so have some mineral spirits around to clean your hands.

Used Cofair and Grace Vycor tapes on my front and back decks (Timbertech composite on pressure treated joists). Cofair sticks to green pressure treated lumber better than Vycor; however, Vycor is stickier overall sticking to dry lumber, skin, gloves, shoes, and itself much more aggressively (i.e., Cofair is easier to install under typical conditions). Cofair is all black, which looks better than the Vycor (which has white lettering on it) when looking between your deck boards. Backing on Cofair comes off cleanly, Vycor backing tends to get stuck and tear. Cofair textured surface is also more slip resistant than the Vycor when walking on joists while laying the deck. The backing of the Vycor is gummier than the Cofair, in 25 years we will see which of the two self healed around screw penetrations better.

Applied 3” to double joist. The 4” would have overlapped the sides for better protection but this will do to keep water from collecting in between the two joists. Thickness seems okay. Backing peeled off good up to the last 6’ or so then it got hung up on a couple of nicks on the side of the roll but not a big deal. Good adhesion. I’m satisfied with this product.