OK all you deck people. Several years ago I had my rather large deck
completely replaced due to rot. The new deck used white cedar from
the great northwest. I was told that it is extremely resistent to the
normal deteriorating factors. So be it.
The carpenter poured new piers but kept them close to the ground. Then
he mounted the end pieces (what ever they're called) on edge across
the piers. On one side of the deck near a flower garden the mulch was
placed up to the deck touching the side. Over the past 5-7 years the
mulch decayed when had the effect of this end piece and all the
bannisters attached to it to be below the surface of the mulch. As
this was on the garden side no one really paid any attention.
This year, however, someone sat on the railing and most of the ss
screws attaching the bannisters to the end piece detached exposing the
fact that the end piece of the deck is quite rotted through as are the
lower 6-10" of all the bannisters.
I purchased 2 x 10 x 18' of pressure treated lumber to attached to the
old piece as I am not familiar with how to remove it if it happens to
be a supporting end. I'm hoping that I can "sister" the treated
lumber to the old one with ss screws and rebuild the railing using all
new bannisters. Oh, and I've already shoveled out all the mulch and
dirt to a good 3" below the wood now.
So, my question: is this approach feasible? Is there anything that I
could/should do to the old piece prior to attaching the new wood?
Any tips and advice or even actual instructions, pointers to youtube,
etc will be greatly appreciated. Unfortunately as a retired person I
can no longer afford to call in the "Big Guns".
On Friday, August 30, 2013 9:55:13 PM UTC-4, net cop wrote:
Unless something special is going on, which without seeing it we
don't know, I don't see the point to sistering rotted wood. I
would just replace it. I'm also not to keen on the concept of
sistering to a piece of rotting wood. Sistering usually means
the whole piece of whatever is there is left and then you secure
another similar piece to it, like when a joist cracks or a
plumber has foolishly cut big holes in it. If you put rotting
wood in contact with new wood, you now have wet decaying wood,
which is similar to what? mulch. So, it would seem to some
extent you're starting the process over again.
Sounds like something was wrong from the design phase on this, either
with height, soil grading, water runoff, etc. A few inches of mulch
shouldn't wind up being in contact with the deck, certainly not to
the extent that it can structurally decay a new deck in just a few years.
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