Where do I use pressure treated wood?

Old 08-29-12, 02:10 PM
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Question Where do I use pressure treated wood?

What is the appropriate place for pressure-treated wood?

Deck posts are obviously PT and interior trim is obviously not, but what about exterior trim on my detached garage that doesn't touch the ground? It's starting to rot away. It is painted and when I replace it, I intend to paint/stain it again.

I rebuilt the front porch railing a few years ago using PT wood because the original non-PT wood had rotted away. I stained that with a white stain to match the house, but now I'm wondering if it is overkill to use PT wood.

I like doing things right, but there's not much point in exposing myself to harmful chemicals to get it to last 30 years when it originally lasted 15 and I only intend to be there for maybe 5 more years.
Old 08-29-12, 02:12 PM
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Anything outside should be PT or a rot-resistant wood like Cedar or Redwood.
Old 08-29-12, 02:34 PM
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The exposure to ACQ is so minimal you would probably have to eat a 2x4x8 to have ill effects. I don't recommend it where children tend to play, not because of the wood, but because children do things, like eat wood.
Outside wood trim can be replaced using products like Azek, which is far superior to plain wood and paints well.

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