T1-11 siding next to deck

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Old 06-14-17, 02:57 PM
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T1-11 siding next to deck

The T1-11 is rotten right next to the 2X6 FLOOR of the deck.I took up one of the top 2X6 and theT1-11 is rotten from the supporting 2X6 going down behind the supporting 2X6. I was thinking cleaning out all the rotten wood and then using the foam (red can) to spray down were the t1-11 is rotten. I can not get to the bottom.From what I can dig out, it is rotten about 2-4 in down. I would then use a 1X3 board to fill in were I cut the bad t1-11 siding out. The T1-11 siding goes to bottom of the supporting 2X6. At thee bottom the siding is still good. I have enclosed some pictures .
The question is the red can of spray foam good enough to last 5-10 years to seal were the rotten wood was. At my age I will let my son think about what to do then.
 
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Old 06-14-17, 03:11 PM
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Using foam is pointless unless you just want to make a bigger mess of it.

The ledger should never have been installed on top of the siding like that, it's probably at risk of falling off... probably nailed to the house too, isn't it? Whoever did that did you a real solid.

If you only want it to last a little while longer, put a metal flashing over the ledger then cover the flashing and rotten siding up with a 1x4 (to act as a counterflashing) and then caulk the heck out of the top edge of the 1x4.
 
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Old 06-14-17, 03:24 PM
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Use z-flashing on the top of the 1x4 and use an expanded PVC board instead of wood. So the sandwich from top down would be - cut rot out enough to install a 1x4 - add z flashing -1x4 PVC, Regular flashing that comes out over the header and extends onto the joists. You would do this for the entire length of the ledger for it to look "planned" and uniform.


Edit - Expanding foam will be a nightmare once you apply. It will do nothing to help.
 
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Old 06-14-17, 03:26 PM
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What are all the cabinet pictures for? Are they somehow related to your problem?

Can you post a picture from the bottom of the deck looking at the ledger or a shot from above but further away so we can see how it's attached to the house?
 
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Old 06-15-17, 04:27 AM
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When computer not working good and file images are very, very small,I took wrong images. I will try and do the Z flashing and the PVC instead of green wood. I understand the foam can be messy. I have used before and can control foam pretty good so job will not be messy. Will be using foam to close up space when I install new PVC. Can not get behind ledger ,so just to fill hole that will be there. Deck has been up for about 30 years in the mountains.



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Old 06-15-17, 04:48 AM
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It looks like the ledger is just nailed in place. While you have some deck boards up I would bolt the ledger every 24" with 1/2" hot dip galvanized bolts to the rim joist of the house.
 
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Old 06-19-17, 01:02 PM
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How long are the --1/2" hot dip galvanized bolts-- to be used. I found out that for some reason they had ply wood behind the t1-11 siding. SO I will have to use TWO 1X4 PVC to take up the space so that the PVC comes out about 1/4 to 1/2 in. I can put the flashing behind and under the 1X4 but will have to use silicone when joining the PVC and the T1-11 siding at the top. Can not put flashing or Z flashing between PVC and T1-11 siding (on top of PVC) since I can not get a LIP to go up behind the T1-11 siding. Really do not want to pry out t1-11 to add lip to push flashing up.
 
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Old 06-19-17, 01:33 PM
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Ledger boards should be bolted with carriage bolts, which mean they go all the way through and have a washer and nut on the inside.
 
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