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Posted by Ernie Willson on March 11, 2009, 7:20 am
James wrote:
> About 5 years ago, I installed a set of outdoor steps leading up to a
> gazebo. These steps are made out of 6 X 6 pressure treated timbers.
>
> The steps are planted into the ground, and staked with rebar. They are
> holding up well. They have never had a sealer,
> stain, or paint on them.
>
> Within the last year, the steps got a slime green color (not the original
> PT color), which I assume is some type of algae growth. This made them very
> slippery when wet, so they are a danger to walk on when it rains.
>
> I cleaned them with a 50-50 water/clorox solution, which removed the green
> algae. But, I now see quite a bit of black areas, which I assume is
> mildew.
>
> Two Questions:
>
> 1. do you think that undiluted clorox would remove the black areas of these
> steps ?
>
> 2. once I get the black mildew areas clean, what should I paint the steps
> with ? I assume a sealer will not do well on PT lumber, and I don't think a
> stain will penetrate PT lumber very well.
>
> ------------------------
>
> Am I on the right track ?
>
> Comments and advice please !!
>
> Thanks !
>
> James
I had the same problem with pressure treated lumber on my patio. Washing
it about once a year with a pressure washer solved the problem.
EJ in NJ
>
>
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> I am going to clean the mildew first, and then see if it is worth the
> bother to paint.
> Thanks again !!
> James