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Pressure treated wood porch stairs-what oil treatment to apply

858 Views 6 Replies 4 Participants Last post by  ratherbefishing
I had the stairs leading to my front porch rebuilt about 2 years ago. Please see the picture attached.

Had heard best is to let the pressure treated wood dry for at least a year before applying any type of preservative oil etc to it.

Pressure treated lumber was used to build the stairs and platform at the base. The wood is still pretty new looking as it gets very little use - most people use the back door entrance.

What type of cleaner should I use to pre-treat the wood prior to oil? There are only one foot print stain on one of the steps at present. When I owned a house 20 years ago and had a deck built I used Thompsons and Behr. Can't remember which one was the best though.

I don't want to stain it a color just treat it. May I please have some suggestions on the best type of sealer/treatment that I should apply to the stairs. Again, I don't want to stain it any color just preserve the stairs.

What is the best way to wash the stairs before treatment (I know I have to let them dry after for a few days and make sure no rain predicted for a few days after oiling).

When I had my deck built in my other house years ago I would scrub it down with bleach with a scrub brush. Maybe not such a good idea but it took out all the dirt etc and then after it dried completely I would oil it.

If you can provide a link to a specific product it would be appreciated - not just a brand name. Thanks!!

Yes, I know the top stair looks way off "level" but it is only because whoever built the porch made way too much of a pitch to it for drainage. This was done years before I bought the house. Planning to sell the house in about 2 years or so and rebuilding the porch is not in my plans. Its there and stable, just a steep pitch.

Thanks for your help


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Pressure treated lumber is self protected from fungus and bacteria and you don't need some kind of water repelling coating. Sun UV light damages the wood fiber and the only way to get uv protection is blocking the sun with some kind of stain with solids in it. I assume uv reflects off the solids instead of hitting the wood. If stain/coloring is no good, yearly cosmetic cleaning is about all there is.
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