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2023-11: Warosu is now out of extended maintenance.

/diy/ - Do It Yourself

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1070660 No.1070660 [Reply] [Original]

I just looked at a house today to buy, and the only real problem I found (I do this for a living) was the deck appears to be sliding/sinking in towards the house. The force on the ledge caused some of the block in the basement to move inwards, and the previous owner did a really shitty job patching the cracked mortar joint. The deck is only about two feet from grade to bottom of the joists. What would be the best way to jack the deck in the direction of the red arrow so that I could then brace the deck and better assess what is happening? Truthfully I think they undersized the footers.

>> No.1070663

So you make bad drawings for a living?

>> No.1070673

>>1070660
use a car to pull the deck away from house

>> No.1070676

>>1070663
You dont understand what he means from this?

>> No.1070679

>>1070660

A jack which can work horizontally, a strong beam vertically in the ground and some chain?

http://www.harborfreight.com/12-ton-hydraulic-bottle-jack-66480.html

Perhaps an extra beam screwed on the front of the deck, if it wouldn't survive being pulled forward by two points.

>> No.1070682

cant you just unscrew a few/enough decking boards to inspect from above?

Problem (as I see it) exerting force, whether sideways/upwards/forwards whatever.. I'm not seeing how this is (a) really aiding inspection (b) something prob. gonna give, esp under assault from cars and shit. Different if you had bought it and your property - when not, demolishing the entire deck to 'get a better look' may not go over well with current owners, even if needed in your opinion.

>> No.1070704

>buying a house with block foundation

kek

It's leaning because it sunk. level the deck and install new post with a proper footings on the house side. detach the deck from the house. add cross bracing if necessary.

>> No.1070718
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1070718

>>1070660
>(I do this for a living)
>wat do?

see
>>1070704

>> No.1070766

>>1070718

I assume he inspects but has nothing to do with fixing

>> No.1070793

>>1070660
I work in a construction firm as a draftsman and I don't understand this. What force is pushing the deck towards the house? Are the piers in at an angle or something so the pressure from the soil is pushing the deck in? How is the deck fastened to the wall? Better take some pictures. Here are some standard residential details for my Province that illustrate how a deck is constructed, among other things.

https://www.london.ca/business/Permit-Licences/Building-Permits/Documents/tacboc_details_2012_r001.3.pdf

>> No.1070811

>>1070660
>>1070793

My guess is that the deck isn't pushing anything. The block wall just isn't reinforced properly and is leaning under its own stress. it just happens to be pulling the deck in with it.

But seriously, if the foundation is collapsing, the house is fucked.

>> No.1070819

>>1070811
You're referring to a lack of rebar in the block foundation? The wall itself has no stress. The loads are vertical from the roof, and horizontal from the lateral pressure of the soil. There's really no way to tell what's causing the failure without some photos. OP could get some pictures from his basement and show if there are cracks and which direction are the cracks running.

>> No.1070821

>>1070819
lack of rebar and/or concrete fill could be one issue.

but really, it doesn't matter WHY the wall is failing. if it was built correctly you'd be able to hit it with a bulldozer and it shouldn't move. that fact that it's collapsing is enough reason to look elsewhere.

>> No.1070838

>>1070660
I'd say you'd be better served to rent some anchors to drill into the ground and pull it with a come along winch