Prepping process for mixture of new and old decking

cstleddyJuly 11, 2012

I posted this in Decks/Porches as well...

We had some of the flooring and rail tops of our 15 year old pressure treated pine deck replaced. I'd like to get it prepped and stain it with a semi-solid stain to get a uniform look (not really into too much wood grain appearance).

The new boards are blonde and the old are dark and gray. Should we use a stripper? A cleaner? A wood brightener?

There's a little of the original semi-transparent stain on the spindles but it's pretty worn away on the floor boards. We are in Raleigh, NC. Deck is on the northside, but almost 100% full sun all day during the summer.

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The dark wood in the original photo is not brown stain. There's some residual stain, but mostly it's dirty, weathered wood. Photo was taken on a cloudy, rainy day.

This photo was taken when dry.

    Bookmark   July 12, 2012 at 7:18PM
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I would say wood brightener, based on the look.
Don't expect all of it to look the same after staining.
Make sure you read and follow the label, as in if you choose oil semi-solid you may be limited to one coat, and the porosity difference will be quite evident once you apply the stain.

    Bookmark   July 13, 2012 at 2:18PM
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Thank you so much for your helpful comments.

Do you think I need to use a stain stripper?

    Bookmark   July 13, 2012 at 3:53PM
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You can quickly darken the new stuff with an iron acetate solution.

1 gallon white vinegar
1 "pillow" of 4-0 steel wool
1 box cheap black tea (4-8 ounces) maybe

Shred the steel wool into the bottle of vinegar, leave the lid loose, and let it dissolve completely. It will bubble go murky, then turn reddish. This is "100%".

TEST various dilutions. Species vary in how blackish or red-brown they turn. Oak goes deep purple-grey, spruce goes charcoal or dark grey-brown, pines (western species) go red-grey ... depends on the wood's tannins and phenols.

Spraying the wood with strong black tea and letting it dry will make it easier to get a grey color because it increases the tannins.

    Bookmark   July 14, 2012 at 11:53AM
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