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Pressure Treated?

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Forum topic by ahriman posted 06-06-2020 12:39 AM 325 views 0 times favorited 10 replies Add to Favorites Watch
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ahriman

19 posts in 43 days


06-06-2020 12:39 AM

Hello All- First post, unfortunately not a pretty nor clever one. Hopefully a simple question to answer though. I am doing some reno on the home, and came across what may be pressure treated wood posts holding up my stairway. Can you take a look and tell me what you think (hopefully my photo posting works). The smell is dry and musty, not oily and chemically, but those little divots are worrisome.

https://photos.app.goo.gl/xZU9xd2TsYxEsAAG9

-- "Flying is learning how to throw yourself at the ground and miss"


10 replies so far

View Holbs's profile

Holbs

2344 posts in 2801 days


#1 posted 06-06-2020 12:40 AM

no photo.
when you post a forum message, there will be an upper right green button called “preview” that will show you what your post & pic looks like before submitting.

-- The Carpenter Bee is derived from the Ancient Greek word wood-cutter "xylokopos/ξυλοκὀπος"

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ahriman

19 posts in 43 days


#2 posted 06-06-2020 12:52 AM

Thanx Holbs, maybe the link works?

-- "Flying is learning how to throw yourself at the ground and miss"

View Andre's profile

Andre

3566 posts in 2578 days


#3 posted 06-06-2020 05:31 AM

Looks like P.T. to me! Most of the older stuff around here was green but last few years they have switched to brown.

-- Lifting one end of the plank.

View controlfreak's profile

controlfreak

757 posts in 373 days


#4 posted 06-06-2020 11:12 AM

Strange looking rough milling. Makes me thing that it is repurposed scrap wood. Is it supporting the stairs or could it have been put there to wall off the space underneath?

View ibewjon's profile

ibewjon

1630 posts in 3565 days


#5 posted 06-06-2020 12:56 PM

Does not look pressure treated, old or new. Pallet lumber or cribbing ?

View Holbs's profile

Holbs

2344 posts in 2801 days


#6 posted 06-06-2020 02:42 PM

I thought pressure treated lumber have those triangular 2mm-3mm divots from machines. This looks…rough hacked. Could you scrape off a couple layers to see the if there is chemical discoloration?

-- The Carpenter Bee is derived from the Ancient Greek word wood-cutter "xylokopos/ξυλοκὀπος"

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ahriman

19 posts in 43 days


#7 posted 06-06-2020 04:15 PM



Is it supporting the stairs or could it have been put there to wall off the space underneath?

It is structural, supporting the mid-landing of the stairs.


I thought pressure treated lumber have those triangular 2mm-3mm divots from machines. This looks…rough hacked. Could you scrape off a couple layers to see the if there is chemical discoloration?

I uploaded another photo circling what I thought to be those divots/impressions that indicate pressure treated. Kind of did scrape off a bit, this wood is probably 30-40 years old (if the age of the house is any indicator), and no real evidence of discoloration other than the “aged” brown patina of musty old wood.

-- "Flying is learning how to throw yourself at the ground and miss"

View LesB's profile

LesB

2553 posts in 4215 days


#8 posted 06-06-2020 06:12 PM

So, on pressure treated wood the divots are the work of the machine they use to inject the pressure treatment into the wood. Yours appear to be from a milling machine fo some sort but then the wood was surfaced by hand with an adz or similar tool. It does not seem to be pressure treated.
Unless you see obvious rotting (soft spots or dark discolorations) it should be fine.
Does any of it go into soil that is wet? In that case check it for rot with a sharp probe like a ice pick to see if it is easy to penetrate. Also wood that rests on concrete that has soil contact can wick moisture and rot the end of the wood. There should be a water proof membrane (felt paper, asphalt roofing material, or plastic) between the wood and the concrete.

Pressure treated wood today comes in two varieties. One for above ground made mainly to prevent insect damage and the second that is for below ground to resist fungus and other moisture damage.

-- Les B, Oregon

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ahriman

19 posts in 43 days


#9 posted 06-06-2020 08:19 PM

I am going to go with no, and proceed with exposing the rest of it. My gut tells me it is not, especially since it is devoid of that nasty unmistakable chemical smell. However, if I die from the dust I will kill you guys.

Thanx for the responses, good to be part of the board.

-- "Flying is learning how to throw yourself at the ground and miss"

View Holbs's profile

Holbs

2344 posts in 2801 days


#10 posted 06-06-2020 10:43 PM

Keep us posted either after you find out that it is not pressure treated, or after you die cause you listened to us :)

-- The Carpenter Bee is derived from the Ancient Greek word wood-cutter "xylokopos/ξυλοκὀπος"

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