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Old 04-29-2019, 07:28 PM   #1
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Backyard deck rising on one side


Our house, built on cinder block crawl space seven years ago, has a 12x12 rear deck that sits up 2 feet from the earth. Over the years the earth under the deck has risen. The part of the deck attached to the house is unmoved but now the deck has a very noticeable incline of about four inches as you walk the 12 feet to the rear.

To build the house the yard was levelled with quite a bit of a sand/clay material, at least a foot, maybe two, and the deck posts were set with about three inches deep of concrete which has risen along with the yard, thus leading to my ugliness problem. Also, the movement has put pressure on the structure, including the supporting boards and the lattice (pic).

How can I most efficiently level the deck?
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Backyard deck rising on one side-deck-rising.jpg   Backyard deck rising on one side-damage-deck.jpg   Backyard deck rising on one side-deck-lattice.jpg  
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Old 04-29-2019, 07:32 PM   #2
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Re: Backyard deck rising on one side


Quote:
and the deck posts were set with about three inches deep of concrete which has risen along with the yard,
Ayuh,.... Where are you,..??

How deep is the frost depth,..??

3 Inches deep,..??
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Old 04-29-2019, 07:47 PM   #3
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Re: Backyard deck rising on one side


The proper fix would be to dig down to the required depth and put good footings under the posts.
The quick fix that might buy you a few years and may have to be done again. is to just shorten the posts to level the deck.
I would just shorten the posts and keep it going until the deck needs to be replaced and do it right at that time.
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Old 04-29-2019, 07:56 PM   #4
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Re: Backyard deck rising on one side


I'm in Houston. And the wood is definitely showing its age but I think it has a few years left in it yet.

Does shortening the posts mean a chain saw? I guess all the latticework would have to come out and get trimmed to refit :-(
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Last edited by puttster; 04-29-2019 at 08:04 PM.
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Old 04-29-2019, 08:06 PM   #5
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Re: Backyard deck rising on one side


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I'm in Houston. And the wood is definitely showing its age but I think it has a few years left in it yet.
On both sides measure down a few inches and draw level line out to the outside of the deck, measure to the deck and the difference is the amount the post needs adjusting.
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Old 04-29-2019, 08:30 PM   #6
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Re: Backyard deck rising on one side


If I remove 4" from a post, when it drops down the top part is not going to line up with the bottom part. suggestions?
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Old 04-29-2019, 08:39 PM   #7
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Re: Backyard deck rising on one side


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Originally Posted by puttster View Post
If I remove 4" from a post, when it drops down the top part is not going to line up with the bottom part. suggestions?
the top part of what won't line up with the bottom part of what?
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Old 04-29-2019, 10:10 PM   #8
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Re: Backyard deck rising on one side


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If I remove 4" from a post, when it drops down the top part is not going to line up with the bottom part. suggestions?
You are saying that the deck is shifting side to side as well as up and down? If so you would need some diagonal bracing (cables?) to straighten things out.
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Old 04-30-2019, 10:02 AM   #9
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I think the post is no longer straight vertical so when I remove 4" it will not match up. It should be close though.
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Old 04-30-2019, 10:06 AM   #10
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Re: Backyard deck rising on one side


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Originally Posted by puttster View Post
I think the post is no longer straight vertical so when I remove 4" it will not match up. It should be close though.
If the deck is pulling away from the house you may want to address that at the same time.
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Old 04-30-2019, 10:33 AM   #11
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Re: Backyard deck rising on one side


When you cut out your 4" of post, maybe use one of these if you're worried about the butt ends slipping?

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