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Anybody ever done serious deck repairs before?

stoney

Part of the unwashed, middle-American horde
Jul 26, 2006
21,615
7,276
Colorado
I submitted this elsewhere, but was hoping maybe some of you guys know how to do this stuff better than I can sort out from the intrawebs and experience. @dan-o Anybody else do home building/general contracting?
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I have a large, elevated deck (~10ft up) with two pergolas and Trex surface in need of maintenance. We bought the house as-is about a year ago and have been working our way through priority items and have finally made it to the deck. The surface and railings were replaced about 2.5 years ago with Trex after a really bad hail storm, but I have no idea about the level of maintenance/work done on the rest of the deck. Given the other work that I have come across in the house (almost electrocuted earlier due to non-code work), I have low confidence levels in pretty much anything that I am going to come across.

There are a few issues that I can identify immediately:

- at least four joists showing substantial dry rot, four or five more showing signs as well. One of which is at least 12ft long and goes through a cross-beam and is inaccessible to the rear because of a large shed. There are 25 joists on the deck.

- the remaining are all readily accessible on both ends, but do go over the horizontal main support. Getting them in and out from beneath should be easy enough though. If you look at the images, he put space fillers in between the joists to make it look more solid.

- On of the railing supports has a very, very shady repair that was done to keep it from shaking too badly during the open houses and sale process. However, the repair did a ton of damage to the rim joist (the outer frame, I think that's what it's called), so one of the lengths is now in need of replacement along with the actual railing support.

- Nails are working themselves out throughout the deck. I was going to get my ladder out and go to town today but paused to get feedback, as some of those nails might need to come out for repairs. You can see the extent in the imgur album below.

https://imgur.com/a/cImWXgt

Important details:

- I'm in Colorado, so we get full weather cycles. The deck is south-west facing and melts off almost immediately, no matter what the temperature is, as long as there is sun.

- With it being south-west facing, it gets blisteringly hot during the summer. The deck surface is probably 100*+ right now, ~90* outside.

- I'm not married to non-pressure treated wood; I just want repairs to last. The current sealant is Sherman Williams Deckscapes. I have no idea how long it has been since it was last treated, so part of this process will likely involve sealing/treating it.

What I am trying to avoid is pulling up the surface to do the work on my own. I have a dog whose door access during the day is via the upstairs sliding door and a six year old who I don't trust to pay attention to not walking out the door blindly.

Questions:

  1. Should I for safety sake just go to town with the hammer and start beating things in? My initial gut and everything from all work I've ever done before says resoundingly yes, then deal with pulling out nails as needed.

  2. What is the best way to remove the rotted joists and replace them? Pull the filler wood pieces (see images), remove deck screws from above, then just cut it and drop it?

  3. What it the best way to install the replacement joists? I can't find anything clear on youtube actually showing how to do it. I know that I need to use new hangers.

  4. With the really long joist, I have a feeling that I will be cutting out the last four or five feet, then sistering it. I was planning a 3ft overlap on each end, which should be more than sufficient. In this case, what is the best binding method? I was planning drill through and bolt it twice on each side of the cut.

  5. The big beast is the rim joist; this has a lot of sub-questions as well
    1. What is the best way to replace this? All of the joists dead-end into is and have joist hangers attaching it to the deck.

    2. As the railing posts are attached to the rim joist, what is the best way to support the railing while it is off? I was thinking just a triangle support attached 90* to the railing itself? I know for the pergola I would just put up a 2x4 to support it temporarily. More experience would be appreciated though.

    3. For re-mounting the railing post, what is the best way to mount them to get rigidity. Obviously bolt straight through isn't sufficient.
My plan was joists > rim joist > railing post.

It's a big project, but and expensive one to contract out, so doing it in-house is my goal. Recommendations and suggestions as to how things should be done - order of operations, etc. - are greatly appreciated!
 

Nick

My name is Nick
Sep 21, 2001
24,065
14,714
where the trails are
I didn't think Trex could rot. Hmm.
If you have nails backing out, pull them one at a time and replace with an appropriate screw.

Other than that I have no idea. Spend a shit ton of $$ on a new deck?
 

stoney

Part of the unwashed, middle-American horde
Jul 26, 2006
21,615
7,276
Colorado
I didn't think Trex could rot. Hmm.
If you have nails backing out, pull them one at a time and replace with an appropriate screw.

Other than that I have no idea. Spend a shit ton of $$ on a new deck?
Not the Trex surface, the wood joists. I wasn't sure about putting deck screws into the structural locations. Surface? No issue. Structure? Eh...
 

eric strt6

Resident Curmudgeon
Sep 8, 2001
23,321
13,613
directly above the center of the earth
some photos of what we did. Sistered with 2 to 3 bolts when we had good joists and supports, replaced joints and columns where needed by doing big tube pours and sinking steel braces into the wet concrete that uses two bolts to secure the new uprights into the saddle then putting a steel saddle on top of the upright and bolting the joist into place. All the joists got topped with a rubber membrane to prevent water from pooling and rotting them and then the deck boards were screwed into place with torx head deck screws. 4500 linear feet of decking all redwood. Railing supports were secured with 8" lag bolts. Not a single nail was used during the build. Screws don't pop up like nails do.

http://i20.photobucket.com/albums/b217/Eric1218/2010-11-29_16-17-22_796.jpg

http://i20.photobucket.com/albums/b217/Eric1218/2010-11-29_15-42-55_883.jpg

http://i20.photobucket.com/albums/b217/Eric1218/2010-11-30_12-07-35_442.jpg

http://i20.photobucket.com/albums/b217/Eric1218/2010-11-30_16-10-58_230.jpg

http://i20.photobucket.com/albums/b217/Eric1218/P1050075.jpg

http://i20.photobucket.com/albums/b217/Eric1218/P1050078.jpg

http://i20.photobucket.com/albums/b217/Eric1218/P1050079.jpg

http://i20.photobucket.com/albums/b217/Eric1218/P1050086.jpg

http://i20.photobucket.com/albums/b217/Eric1218/P1050186.jpg

http://i20.photobucket.com/albums/b217/Eric1218/P1050191.jpg

http://i20.photobucket.com/albums/b217/Eric1218/P1050196.jpg

http://i20.photobucket.com/albums/b217/Eric1218/P1050197.jpg

http://i20.photobucket.com/albums/b217/Eric1218/2011 photos/P1030121.jpg
 

eric strt6

Resident Curmudgeon
Sep 8, 2001
23,321
13,613
directly above the center of the earth
that was a repair job over half or the deck was totally rotted in the front of the house, the back deck we were able to reuse the joists but then we expanded the deck width by sistering in and adding end support columns. It took me and two guys 6 months to rebuild that sucker
 

Westy

the teste
Nov 22, 2002
54,442
20,247
Sleazattle
Replace bad sticks with good sticks, ain't rocket science.

The fact that a bunch of shit was already replaced ,doesn't bode well for the rest of it.

How old is this place? Did you get it inspected? This is an easy check to make, shouldn't be a surprise.
 

stoney

Part of the unwashed, middle-American horde
Jul 26, 2006
21,615
7,276
Colorado
Replace bad sticks with good sticks, ain't rocket science.

The fact that a bunch of shit was already replaced ,doesn't bode well for the rest of it.

How old is this place? Did you get it inspected? This is an easy check to make, shouldn't be a surprise.
No shit? Replace the bad ones with new ones? If only I had thought to ask somebody how best to do that, since I've never done it before...

The entire surface was replaced at the same time as the roof and the windows after a 10min long, baseball-sized hail storm two summers ago. The deck itself is less that 7 years old.

It was inspected and those joists and the sketchy repair were what came up. We bought as-is (thank you CO housing mkt), so we only got a slight cost offset because the railing is a safety issue.
 

StiHacka

Compensating for something
Jan 4, 2013
21,560
12,505
In hell. Welcome!
Less than 7 YO and so much rot already?
Stories like this make me feel better about not having a deck. Now excuse me, I got to take care of my under-maintained wood windows...
 

dan-o

Turbo Monkey
Jun 30, 2004
6,499
2,805
Strip to the framing (I'd ditch the trellises too)
Replace/repair as needed.
Ice & Water on top edges of everything.
Move railing posts inside framing. (braced on 2 sides by joist/rim)
Resurface.

IIIHire it out.
 

stoney

Part of the unwashed, middle-American horde
Jul 26, 2006
21,615
7,276
Colorado
Strip to the framing (I'd ditch the trellises too)
Replace/repair as needed.
Ice & Water on top edges of everything.
Move railing posts inside framing. (braced on 2 sides by joist/rim)
Resurface.

IIIHire it out.
I was really hoping you weren't going to say something like that. Given it's Trex, I'm assuming by resurface you mean reinstall?
 

stoney

Part of the unwashed, middle-American horde
Jul 26, 2006
21,615
7,276
Colorado
Sounds like someone forgot to check the pressure treated box.

Dry rot is a fungal decay and rather unlikely to occur in treated wood.
The amount of "do it the cheap way" we have found from the prior owner is epic. I'm all for saving a buck, but when you save $1000 when it might potentially cost you $10k later, that's no way to live your life.
 

stoney

Part of the unwashed, middle-American horde
Jul 26, 2006
21,615
7,276
Colorado
Tell the Wifey that it might be time to start looking for a new house again.
Her new finish on the fire place and everything else on her list just got pushed back about 2 years, whether she likes it or not.
 

dan-o

Turbo Monkey
Jun 30, 2004
6,499
2,805
I was really hoping you weren't going to say something like that. Given it's Trex, I'm assuming by resurface you mean reinstall?
You can likely reuse what’s on there, assuming the fasteners come out.
If it’s a style that allows hidden fasteners I’d go that route (you can rent the tools).
 

6thElement

Schrodinger's Immigrant
Jul 29, 2008
15,974
13,227
Not a single nail was used during the build. Screws don't pop up like nails do.
Depends on local code, I knew someone who used screws and the inspector wouldn't sign off because local code required nails :bonk:
 

dan-o

Turbo Monkey
Jun 30, 2004
6,499
2,805
Nail the framing, lag or carriage bolt the sisters/railing posts, screw the flooring (or use HidFast system).
I'd pay a pro to lay eyes on the thing and ensure its tied into house appropriately, if you DIY.
 

Jozz

Joe Dalton
Apr 18, 2002
5,885
7,423
SADL
The amount of "do it the cheap way" we have found from the prior owner is epic. I'm all for saving a buck, but when you save $1000 when it might potentially cost you $10k later, that's no way to live your life.
Not if you plan on selling the house to some poor saps! ;)

We have friends who bought a house during winter. Inspector did not see the damage on the deck. Ended costing them $32k. They are suing previous owner since it was shown that he tried to camouflage damages.
 

SkaredShtles

Michael Bolton
Sep 21, 2003
65,734
12,758
In a van.... down by the river
Whoever put the deck on our house was either a hack or a cheap moron (or maybe both?)... fortunately I have a riding buddy that is a deck guy and he gave me the straight scoop. I had the deck re-done almost completely (including numerous structural changes) - it wasn't cheap, but at least I know it's sound now...
 

CrabJoe StretchPants

Reincarnated Crab Walking Head Spinning Bruce Dick
Nov 30, 2003
14,163
2,484
Groton, MA
My roommate just had his deck redone. It's not big but it was 5k for the deck. Is that a lot? Probably 150 sq ft.
I just rebuilt my TINY 10' x 12' deck myself and materials alone were about $4k. Tore it down to the joists, did minimal structural work (bracing between the joists, added cribbing no the rail posts). Built a new set of stairs on the back vs. side of the deck, trex, Azek railings and enclosed the bottom.

Depending on what was done, $5k is very reasonable for that size deck.


 

stoney

Part of the unwashed, middle-American horde
Jul 26, 2006
21,615
7,276
Colorado
Not if you plan on selling the house to some poor saps! ;)

We have friends who bought a house during winter. Inspector did not see the damage on the deck. Ended costing them $32k. They are suing previous owner since it was shown that he tried to camouflage damages.
As-is. Plus we got a moderate concession for repairs.