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Nail-Holes ! ... AGAIN ! ! !
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 Posted: Tue Feb 9th, 2016 12:12 am
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mabloodhound
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In the close-up photo, those are clearly rust stains.  Look at the window header...same stains...running in the direction of the wood grain.



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Dave Mason
D&G RR (Dunstead & Granford) in On30
“All tyranny needs to gain a foothold is for people of good conscience to remain silent.” ~ Thos. Jefferson
“Those who hammer their guns into plows will plow for those who do not.” ~ me
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 Posted: Tue Feb 9th, 2016 07:20 pm
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SJSlots
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Or... could it be a combination of stress fractures in the planks, rust from the nails and sediment/dirt added over quite a few gusty days. I also see what I would determine to be water staining on the planks.



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 Posted: Tue Feb 9th, 2016 10:31 pm
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NevadaBlue
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Just a bit more info, based on first hand experience with those old buildings. I've salvaged wood from similar buildings (that were to be torn down) and learned a lot about them. First, many of the buildings were built with the knowledge that many of them would be 'temporary'. Especially mining towns, were boom and bust type of places. Paint wasn't necessary really. LOTS of the buildings survived for a very long time because of the climate.
The siding is called Drop Siding. Here is a profile of the boards used. The curved area on the right in the photo is the top and the square notch on the left is the bottom. The top in the picture is the outside surface of course. The cracks in the old building's siding are because of the shape of the lower edge of the siding. It was nailed to the studs in the wall, just above that notch. As the boards weathered and shrank, the nail held the stuff below it and the crack was the result.



The material is very difficult to salvage in a lot of cases. The boards become fragile from weathering. Many times, the nails will be loose so it is easier to remove the siding. But, if the nails are tight, a lot of the lumber is lost to breakage. Yes, the black stains are rust, same as red rust but black due to the type of oxidation. Dry climate makes odd things happen.

Oh, rust... iron oxide, Red Rust is Fe2O3 to Black Rust is Fe3O4.

Last edited on Tue Feb 9th, 2016 10:36 pm by NevadaBlue



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 Posted: Wed Feb 10th, 2016 07:21 pm
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mabloodhound
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Good explanation Ken and good photos. And thanks for the chemistry reminder.



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Dave Mason
D&G RR (Dunstead & Granford) in On30
“All tyranny needs to gain a foothold is for people of good conscience to remain silent.” ~ Thos. Jefferson
“Those who hammer their guns into plows will plow for those who do not.” ~ me
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