A friend had a porch built about 10 years ago. The contractor used
pressure treated lumber but now, the wood is warping an cupping. I
need to replace it to make it safe to walk on. Also, the contractor
nailed it rather than screwed it together so the nails are working their
What type of wood should I use for the replacement? I'm looking for no
rotting and no physical changes.
I just replaced all of the 2X6 badly weathered PT boards on my deck.
My joists spanned 2 feet apart, so if I wanted to use the composite
stuff I would have had to beef up the entire deck with more joists to
be 16" OC. So I just stuck with the same PT wood. It was cheaper. And I
think the previous owner did not maintain the deck well. At least now I
know I will maintain it.
I would look at the environment on the two opposing surfaces.
It's quite possible that there is enough humidity below the deck and
enough drying of the upper surface to promote cupping & warping.
Second, pressure treated wood has high moisture content. Look at kiln
dried pressure treated.
That's expensive. Let the wood come to a more nearly steady state while
stacked on the porch.
This is time consuming and there will be a high percentage of rejects.
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