Decking timber restore

[touch107fm]

Hi guys

I have approx 30m2 of jarrah decking which I got from a client which they pulled up from there house.
Its been denailed. The deck was laid reed side up, I am looking at using it for a small deck project.

I was going to use smooth side up but on smooth side there is a dark stain where the deck was sitting on the joists.

Now I have sanded the timber back and it comes up really good and seems a shame not to use it, but the dark stains are a no go.
Any ideas on how to remove, I was planning on putting it through a thicknesser but have concerned about taking too much off the timber.
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Another Idea was to run the timber through the thicknesser the reeded side up will lose about 3mm from 20mm board.

Cheers

[Kuffy]

have you tried any deckclean stuff + high pressure cleaner? It might get the timber to be a uniform colour along its length, but i suspect the staining from where it sat on the joists will still be noticeable (especially since you already know that it is there).

failing that, a skim pass through a thicknesser wont hurt, 0.5-0.8mm off the face. probably still have a noticeable mark, but if when you oil it, use a stained oil, and in time the sun will bleach everything to a fairly uniform colour.

[rustynail]

Nappysan and water should do the trick

[rwbuild]

Oxalic acid mixed with hot water, liberal soaking and rinse off.

[bob w]

have you tried any deckclean stuff + high pressure cleaner? It might get the timber to be a uniform colour along its length, but i suspect the staining from where it sat on the joists will still be noticeable (especially since you already know that it is there).

failing that, a skim pass through a thicknesser wont hurt, 0.5-0.8mm off the face. probably still have a noticeable mark, but if when you oil it, use a stained oil, and in time the sun will bleach everything to a fairly uniform colour.

Yep, deck cleaner which is oxalic acid, mix with water applied liberally then scrub it in with a very stiff broom then wash off. Don't get it on the plants though. If that doesn't remove it then a skim pass through the thicknesser sounds like the best option, but off the face not the reeded side as that's designed to allow air between the board and the joist to reduce the incidence of rotting.

[Bob38S]

Napisan. Tick. May take more than one application.

Smooth side up is the way to go.

When reeded decking boards were introduced, I was told by a rep that the reed side was designed to go underneath as it allows the board to "breathe" where it sits on the joists and "prevents", read, slows down any rot between the deck and joist. If the reeds are placed up moisture will sit in the grooves and allow greater moisture penetration as it has to evaporate rather than run off.

I believe that people fit the decks with the reed side up to supposedly give greater grip, read anti slip. Looking at it logically, as the reeds are rounded and not sharp, there is less surface area between any footware and the surface, therefore a greater potential for slip.

Also be aware, should you paint or stain the deck in very dark colours and should the deck be in the sun, that the timber will expand and contract to a greater extent with dark colours. This leads to cracking of the surface allowing moisture to penetrate quicker than if lighter shades were used.

just a thought.