My deck has a ledger board lagged into the band joist of the house. I am
going to build another deck to put a 3 season porch on top of it. I would
like the level of the new deck to be the same level as the door, which is
about 10 inches from the top of the existing ledger.
In this scenario, is the level of the deck raised? Do you build a frame on
top of the existing deck frame? I think I need to have the deck lagged into
the house because of the 3-season porch, but not sure. How do you guys do
Thanks for your time.
(x-posted on alt.home.repair)
How many seasons the porch is utilized is immaterial. A distraction.
The surface of the top of the porch decking should be just below the bottom
of the door frame access.
You can tongue out the bottom of the joists for the new porch to the unknown
sized ledger board, OR, you can rip out the ledger board, and put it at
proper height using the right sized lumber.
"Lagging" is a new term for me. It was used in the U.S. Navy in reference
to sealing the equivalent to joints in sheetrock. Can you provide education
to this civilian term in your reference?
By "lagging", I think he means fastening the ledger with lag bolts.
To do it right, I would suggest pulling the old off and raising the
new as Dave says. Also, you need to consider whether the existing
deck footings can support the load of a roof.
Thank you for your responses.
Are you saying the ledger board does not have to be connected to the band
joist of the house?
I understand about the load of the roof. This will be taken care of by
adding concrete piers and more support beams.
Well, it sure won't hurt anything to lag the new ledger (by the way,
there are better options to the old fashioned hex head lags--Home
Depot sells a lag that drives with a power drill, and there are also
ledgerlocks, for example). However, if the deck below is fastened to
the house, and the deck above is fastened to the deck below, you
should be OK. By the way, are you pulling a permit for this? If so,
your city building department will have something to say.
Banging my head on the desk. He meant lag bolt, not lagging.
Might interject here if using treated lumber for the ledger, use stainless
steel screws instead. Treated lumber will eat zinc coated lag bolts.
first how is the deck ledger attached to the rim joist of the first floor
and still 10" below the height of the door.
I dont get that
Rim joists are 2x10 or 2x12 but he must have a 2x18inch high rim joist
I have seen 2x10 ledgers on a 2x12 rim joist and the 5/4 decking comes up a
little low because they aligned it with the bottom and not the top so its
low by about a half inch but not 10 inches heh
if you are using pressure treated especially the new quat type
you want to use
Hot Dipped Galvanized half inch Carriage bolts with lock washers and nuts on
the inside of the house and the round head on the outside of the house and
you put them every 16 inches in the center of where your floor joists are
inside the basement.
Lag bolting is not good practice because they come lose
and as said
plated wont work you need Hot Dipped
also bolt your beams to your posts dont just use lags or nails if you are
not going to use a hanger of some type.
and when you use hangers
buy hanger nails
dont just buy regular brights or plated and expect them to last more then 3
Thanks Marson. You are probably right. I prefer to hear from the OP on
what he/she means by "lagging". Based on his/her subsequent question, I
wouldn't be surprised if it means something else though.
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