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I removed the old deck and found out that the previous ledger board was just nailed to the house. See pictures attached. The wooden boards you see are also nailed to the house, and the ledger board was nailed to those... https://i.stack.imgur.com/d9Lmg.jpg Now that I don't see the house rim joist, how can I attach the deck to the house ? Do I have to remove the house insulation ? Do I build just a free standing deck ? Thank you for your help !

deck

Traveler
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Nazim Haddadi
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    Do you have access to the floor joists behind that side of the house? And if so, in what direction do those floor joists run? – SteveSh May 07 '23 at 00:28
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    Building a free-standing deck eliminates the problems of attaching a ledger board to the house. But you need to provide more posts, footers, and a beam to run across the posts. – SteveSh May 07 '23 at 00:30
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    Building free-standing might also make your permits process easier. Check with your local building dept. – Aloysius Defenestrate May 07 '23 at 01:12
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    Free standing can be a floating deck. If allowed in your area (IIRC years ago when I built mine, it was allowed in all states except NJ) there are likely limits on size and height. But if you can legally build a floating deck it can be a lot cheaper. – manassehkatz-Moving 2 Codidact May 07 '23 at 01:27
  • 1- The floor joists in the basement are parallel to the deck (if that is clear) 2- I am in quebec and no permit is required for a deck attached or not. and I am ok with using more material and puting in more work, if it saves me screwing things iup – Nazim Haddadi May 07 '23 at 11:04
  • @Nazim Haddadi - Are you familiar with Tension Ties? They are used to tie a ledger board to the structure of the house. Information on their use can be found in the Simpson catalogue, and that from other manufacturers. – SteveSh May 07 '23 at 11:25

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I would cover the scar on the house with siding to match, after sealing any holes from fasteners.

Build a freestanding deck. No risk of water infiltration causing degradation to the home. Further, if you decide to change it or remove in the future, you have no work needed to the home.

RMDman
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  • You can put a ledger on without risking water damage if you flash it and tape the flashing correctly. Not a big deal. – matt. May 07 '23 at 20:59
  • Or not need it and not have to do any of that. – RMDman May 07 '23 at 21:07
  • That's not the point, you're inferring that by installed a ledger to the building that you risk water damage which simply is not true. – matt. May 07 '23 at 21:10
  • Sorry but it is true. Diligence will mitigate, but the possibility exists. Where as not attaching a ledger means no intrusions. A hole not made does not need to be sealed. – RMDman May 07 '23 at 21:28
  • Water trapped between a floating rim joist and siding that has nowhere to drain could cause rot as well. A pressure treated framing member with metal flashing and flashing tape works perfectly fine. Guess we will just have to agree to disagree. Good day. – matt. May 07 '23 at 21:33
  • I never understood why the ledger is always set so thaat the top is even with the top of the deck joists. If you put a ledger on use a board that is taller than your joists. if the joists are 2x8 then use a 2x12 ledger. cut the top edge of the ledger at a 45 degree angle and allow it to stick up past the top of the deck boards. Flash the ledger and you will NEVER have any water penetration so long as the flashing is not rotted through. having a deck board cover the top of the ledger is a great way to make a trap for debris and water. –  May 10 '23 at 04:39