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View deadherring's profile

Treatment for pressure treated lumber

by deadherring
posted 08-15-2017 06:50 PM


13 replies so far

View Fred Hargis's profile

Fred Hargis

5095 posts in 2641 days


#1 posted 08-15-2017 07:03 PM

I’d use paint, but that’s just for appearance. Treated lumber will last a very long time without anything. It does need to be dry before you paint it, then prime with a good primer (preferably an oil based) and paint with a 100% acrylic exterior paint. But that’s just me…..

-- Our village hasn't lost it's idiot, he was elected to congress.

View RW19's profile

RW19

1 post in 432 days


#2 posted 08-15-2017 07:44 PM

I built this a few months ago. I let it dry for a month then stained it with some good ole minwax and then paint/weathered it with some good PPG exterior paint. It was my first time doing that kind of finish and I’m pretty happy with it.

View woodbutcherbynight's profile

woodbutcherbynight

5559 posts in 2557 days


#3 posted 08-17-2017 04:40 AM

Paint, use a oil based primer and it will last a long time. Do let it dry out before beginning the entire process.

-- Live to tell the stories, they sound better that way.

View rwe2156's profile

rwe2156

3093 posts in 1629 days


#4 posted 08-17-2017 01:24 PM

Yes you can paint PT lumber but it has to be completely dry. I’ve done it many times with trim on houses.

If it is outside in the weather it will never completely dry.

If this is the case, I would simply coat with a decking sealer.

-- Everything is a prototype thats why its one of a kind!!

View deadherring's profile

deadherring

68 posts in 1791 days


#5 posted 08-17-2017 04:32 PM

Thanks for the suggestions. The Mrs. likes the natural wood look, so I think Thomsons water seal is going to be the way I go.

About how long do I need to wait before applying? A year? Maybe next spring?

Also, do I sand before applying?

@woodbutcherbynight Cool stairs. What would be the reason you need to regularly get on the roof?

View Fred Hargis's profile

Fred Hargis

5095 posts in 2641 days


#6 posted 08-17-2017 04:56 PM

1) when the wood dries a little, it’s probably ready now.
2) No, but you might want to clean it a little if any crap and such fell on it.

-- Our village hasn't lost it's idiot, he was elected to congress.

View tmasondarnell's profile

tmasondarnell

101 posts in 1937 days


#7 posted 08-17-2017 05:13 PM

Nathan,

I am a little confused by what your question is and what are you concerned about.

The 4×6 PT lumber does not need anything done to it for protection, even with full ground contact.

Adding Thompson water seal will not add any additional protection to the Alkaline Copper Quaternary(ACG) that was driven into the wood fibers under pressure. Most likely the Thompsons will bead up and run off. You will not be hurting anything, but you will be wasting your money.

Painting will offer the best protection against UV damage.

View papadan's profile

papadan

3584 posts in 3516 days


#8 posted 08-17-2017 05:14 PM

Let it dry for about one month, sand all body contact areas, (arms, lower fronts) to prevent splinters. soak down with Thompsons water seal and let dry for 24 hours. I use a pump garden sprayer to apply with. Every spring, lightly sand contact areas and spray with Thompsons.

View deadherring's profile

deadherring

68 posts in 1791 days


#9 posted 08-17-2017 08:19 PM

OK, so it sounds like the rough consensus is if applying Thomsons Water seal, let it dry for about a month and reapply every year?

Are there any things to look for when looking at the wood to determine dry enough to have the seal applied?

Thanks.

View Abter's profile

Abter

69 posts in 775 days


#10 posted 08-17-2017 10:45 PM

A $20 moisture meter will go a long way, especially in 1” or 2” stock. easy to buy at most big box stores or amazon. 12% is usual guidance for what you want. Avoid over 20%

Big box PT can be REAL wet. I’ve had juice running out of it from drilling a pilot hole. Very fresh PT runs about 35% or more.

Drying time will vary enormously. A high humidity climate in the shade…it might take forever. In the Mojave desert in the sun….lets just say less.

-- "Many men fish all their lives without ever realizing that it is not the fish they are after." {often mis-quoted as by H.D. Thoreau}

View dhazelton's profile

dhazelton

2789 posts in 2445 days


#11 posted 08-17-2017 11:00 PM

Thompsons doesn’t hold up to weather long. Do it twice a year. You may want to tip your couches over and smear something on the end grain of the legs so it doesn’t wick water up.

View papadan's profile

papadan

3584 posts in 3516 days


#12 posted 08-18-2017 12:38 AM



OK, so it sounds like the rough consensus is if applying Thomsons Water seal, let it dry for about a month and reapply every year?

Are there any things to look for when looking at the wood to determine dry enough to have the seal applied?

Thanks.

- deadherring


Just feel the wood, if it is cool or damp to the touch it’s too wet. It will feel warm and dry when ready. The purpose of the Thompsons is to prevent absorption of moisture. Once a year is plenty and the wood will weather out to a nice gray like you want.

View woodbutcherbynight's profile

woodbutcherbynight

5559 posts in 2557 days


#13 posted 08-18-2017 01:47 AM


@woodbutcherbynight Cool stairs. What would be the reason you need to regularly get on the roof?

- deadherring

Clean the gutters, install lights, minor repairs to roof, pressure washing, all things I did not want to get out a ladder for. As my shop wall is 4 ft buried into the landscape this staircase allows access to the shop roof and from that roof the entire house behind it. Not practical for most but with the lay of the land it works well.

-- Live to tell the stories, they sound better that way.

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