Heavy aluminum tape as joist flashing

[bluedog225]

Tl:dr-use heavy aluminum tape as flashing for deck joists?

I’m replacing a deck in my back yard. I thought I did a competent job on the old one but 30 years has come and gone.

I’ve been waiting for lumber prices to become more rational after Covid. I guess they’re as good as they’re going to get. I’ve got 2 x 8 pressure treated joists. I went ahead and gave them an additional treatment with copper coat (Copper naphthenate). And I’ve put some exterior latex on the top and ends.

As you might be able to guess, I’d rather these things not rot out again. Fortunately(?), I don’t think I have 30 years left.

I was thinking of rolling out some aluminum flashing along the top of the joists before I install the deck boards. Cutting aluminum flashing into thin strips is going be a kind of a pain in the ***. Then I thought why not heavy duty aluminum tape?

I realize the pressure treatment from the deck boards is probably going to mess with the aluminum. But that will take time. And the adhesive might trap moisture?

Anyway, I thought I’d throw it out there for comments. A little overkill doesn’t bother me. But I don’t want to do something dumb. Any thoughts appreciated.

Thanks

 

[Jlanciani]

The aluminum will be gone in a year or two. If anything use strips of ice & water shield.

 

[acer66]

They also make a specific tape for that like this one.

DECK JOIST TAPE

SPAX® Deck Joist Tape protects fasteners and joists from moisture damage, helping extend deck life and ensure a durable, professional installation.

spax.us

 

[PCustoms]

Use joist tape or nothing.

The current pt lumber will eat aluminum in short order.

 

[bluedog225]

They also make a specific tape for that like this one.

DECK JOIST TAPE

SPAX® Deck Joist Tape protects fasteners and joists from moisture damage, helping extend deck life and ensure a durable, professional installation.

spax.us

Thanks. I didn’t know they had such a thing.

Also looking at a roll of torch down roofing at Restore for five bucks.

Edit-peel and stick.

 

[pcmeiners]

"Edit-peel and stick."

referred to as "***** paper", which is butyl rubber. Even uncoated aluminum sheet metal is corroded in a decade against non treated wood with moisture present.

 

[bluedog225]

"Edit-peel and stick."

referred to as "***** paper", which is butyl rubber. Even uncoated aluminum sheet metal is corroded in a decade against non treated wood with moisture present.

because it’s a ***** to work with?

 

[mike93lx]

because it’s a ***** to work with?

Its bitumen, pronounced "bi·chuh·muhn" which sounds like ***** u men

As long as the peel and stick at restore is still sticky, it should be fine. Cut it wide enough to cover the top and down the sides just a little so it stays stuck down

 

[firebirdparts]

I built one during covid and I joist taped everything. I have an EPDM membrane under my deck boards too, so there were some areas where I didn't need tape.

 

[bluedog225]

Thanks gentlemen. That could not have worked out better. The stick down roofing is beefy as heck.

Once I figured out, I could cut it with a pruning blade on the sawzall things went much quicker. Though it is a ***** to work with.

Those joists should last a couple of months.

 

[PCustoms]

Thanks gentlemen. That could not have worked out better. The stick down roofing is beefy as heck.

Once I figured out, I could cut it with a pruning blade on the sawzall things went much quicker. Though it is a ***** to work with.

Those joists should last a couple of months.

Is that granular?

 

[bluedog225]

Yep.

 

[Sumboodie]

They also make a specific tape for that like this one.

DECK JOIST TAPE

SPAX® Deck Joist Tape protects fasteners and joists from moisture damage, helping extend deck life and ensure a durable, professional installation.

spax.us

Huber makes some too. Zip tape

 

[PCustoms]

Yep.

Not trying to be a ****, but that's not really the right material.

I'd also be more concerned about the exposed plywood edge not having flashing then joist tape...

 

[bluedog225]

I tore up that bottom board and cut out the tar paper when I went to redo the deck. I may redo the whole wall. And I will cover the studs, overlapping the plywood with flashing and tar paper. I last redid this whole deal in 1995 And it held up pretty well.

 

[Viper98912]

30 years is pretty good on a deck. I'd just build it the same and let the next homeowner deal with it in 30 years