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Old 11-02-2007, 10:04 AM   #1
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Setting deck posts


Building codes in my area require that the foundation for decks be set 24 inches below ground level. In digging up the ground along the side of my house, I hit the exterior drainage system running to my sump pump before reaching 24 inches. Any suggestions on what I should do?

Thanks


Last edited by Donney; 11-02-2007 at 10:05 AM. Reason: To clarify question
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Old 11-02-2007, 12:13 PM   #2
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Setting deck posts


Re-route the drainage pipe around your footing. Or move your footing.

Why is there a deck footing so close to the side of the house?

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Old 11-02-2007, 12:39 PM   #3
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Thanks. The footing distance was close to the house as follows. The footing needed to be 16 inches wide and the maximum cantilever 24 inches. Subtracting the radius of the footing (8 inches) from the cantilever, the footing is 16 inches from the house.

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Old 11-02-2007, 01:24 PM   #4
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Normally a ledger board is installed below your door opening {if you have one} and will run the length of your deck that you are building. What we are saying is "Why do you need a footer next to your house" You shouldn't need any footers as the ledger is bolted to the house, thus, no need to dig the holes. Right?? Unless we are not hearing you correctly...
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Old 11-02-2007, 03:28 PM   #5
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The deck is below a sunroom door, but is freestanding per local codes.
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Old 11-02-2007, 04:06 PM   #6
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Are you saying the building inspector will not approve a plan for a ledger board to be installed on your house? Never seen anybody build a deck with posts next to the house. But, I am not in your state. You can always move over the footers a bit can't you! Apparently you live where it never freezes because here in Wisconsin we always have to go down 48 inches. Might want to check with the inspector on this again. Communication problem maybe'
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Old 11-02-2007, 05:56 PM   #7
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Several counties in the Washington D.C. area require freestanding decks - there're have been too many decks that have collapsed.

Although the ground freezes in the area, it's usually not too deep.

Thanks again for your information.
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Old 11-02-2007, 11:43 PM   #8
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I have a deck in the back yard that had been put in years ago by a past owner. Where the deck is connected to the house, all the foundation beams have had to have "sister" wood added to the existing wood. The way this deck is built, the water can not drain right, and this water has caused this to happen. I am thinking of installing some posts under the deck, along the deck edge where it connects to the side of the house. Then I will literally cut away the deck from the house, leaving an open space between the house and deck for the leaves and water to go. Does this present any problems, and will a permit have to be pulled for this?

Thank you
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Old 11-03-2007, 07:19 AM   #9
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Move the footing locations by - going with a "support posts set under a double rim-joist" arrangement instead of the cantilever design. This will position your post's footings 24" away from your drainage line(s).
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Old 11-03-2007, 07:29 AM   #10
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Quote:
Originally Posted by bofusmosby View Post
I have a deck in the back yard that had been put in years ago by a past owner. Where the deck is connected to the house, all the foundation beams have had to have "sister" wood added to the existing wood. The way this deck is built, the water can not drain right, and this water has caused this to happen. I am thinking of installing some posts under the deck, along the deck edge where it connects to the side of the house. Then I will literally cut away the deck from the house, leaving an open space between the house and deck for the leaves and water to go. Does this present any problems, and will a permit have to be pulled for this?

Thank you
Do you need a permit for this? I would say so, check with your local building dept.

However, I don't see this as a feasible plan, as it would not be as simple as "cutting the deck away".

The issues of water penetration lie with the way the deck was attached to your home, the flashing ,the pitch, the weather sealing, the drainage, etc. What about your roof - gutters above that area? Is the deck properly pitched away? Is there a door near it that could be allowing moisture to enter?
There are other factors to look at.

I would not suggest to anyone, to simply "cut a deck away" - supports under it, or not - as a plan to stop water penetration.

IMHO: All you would really be doing would potentially be allowing a pathway for more water to enter your home.

If you feel you need someone to come in and look at this issue, contact some local contractors to look at the area and give you some "free" evaluations about how the water is getting in and what should be done to correct it. You could also bounce off of them, your "cutting the deck away from the house" to "stop the water infiltration idea" and see what they say. Tho, don't be surprised with the responses.

Good Luck.
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Old 11-03-2007, 05:01 PM   #11
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Quote:
Originally Posted by localtradesman View Post
Are you saying the building inspector will not approve a plan for a ledger board to be installed on your house? Never seen anybody build a deck with posts next to the house.
We build almost all of our decks without ledgers. Posts end up about 2 feet from the house. I feel that it is a much more superior way to build, as you do not have to worry about flashing issues and water entry at the ledger. Of course anything over 5' we would have a ledger on

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