Viewing a single comment thread. View all comments

wowsuchtroll t1_ja5xzhr wrote

If there is no rot, no need to replace. From what is shown they look clean.

If you are replacing decking with a composite it may be worth while to wrap the tops in vycor or similar while you have it stripped. This will depend on location, cost, long term plans.

502

Mo_Jack t1_ja6rk3j wrote

My parents deck went 25-30 years before they had to replace their pressure-treated joists.

93

cheezemeister_x t1_ja87l31 wrote

Same, but this really depends a lot on how close to the ground the deck is. My parents had a multi-level deck and the ground-level portion rotted after about 20 years. The upper level portion will probably last 100; the joints still look new @ 25 years.

36

ImplicitEmpiricism t1_ja8zpcu wrote

Yeah, I have a ground level deck and after ten years two joists have minor rot. Okay for now but will probably need to replace in the 2030s.

1

rjcarr t1_ja6y7pj wrote

Yup, I recently did this. Joists were about 20 years old and looked fine, but replaced with new pressure treated, added sealer, and put joist tape on top. Should last as long as the pvc deck boards, and sadly, me as well, ha.

55

spiderborland t1_ja7q4gf wrote

Well today I learned about joist tape. After a quick googling, is it effectively the same as sheathing tape like Zip System? A rubber/rubberized tape that just lays on the top joist?

20

inpantspro t1_ja7x15j wrote

Pretty much

3

spiderborland t1_ja803rn wrote

Well cool. I came up with idea on my own at one point, but I assumed that it would trap moisture

11

1HappyIsland t1_ja85i4d wrote

Reminds me of a friend shopping for a roof: 30 years! Do you have 10 year shingles? I'm so cheap I don't want to pay for stuff when I'm dead.

9

dxrey65 t1_ja94df6 wrote

I still remember working at a car dealership when an older lady was at the counter paying for an oil change, and the salesman told her how she could buy a package that would cover her oil changes for the next five years. She just laughed and said "do I look like I've got five years left? Not likely!"

3

Revolutionary_Eye887 t1_ja8stx5 wrote

I just did this too. Since I was installing Timbertech PVC I went ahead and replaced all my joists. 32 in all. Some looked like yours, some were much worse, but why install a long life deck board on lower life structure? I added sealer and joist tape to all the new joists.

1

Spute2008 t1_ja7x681 wrote

Use that tape specifically made for this purpose

7

velociraptorfarmer t1_ja88uo4 wrote

Did this at my grandpa's place before. We replaced everything except for the support posts and joists, and just flipped the face boards around the edge of the deck. 1/2 the work, and it all looked brand new when we were done.

2

wmodes t1_ja93yvn wrote

Check extra carefully anywhere where soil might be in contact with the deck joists. If you replace them, replace them with treated two by sixes instead.

1