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#190059 - 11/04/09 01:13 PM Chinese drywall house
gfretwell Offline

Member

Registered: 07/20/04
Posts: 9012
Loc: Estero,Fl,usa
I was in a Chinese drywall house today, before any rehab was done.
The pictures are on my FTP site, (use your back button to get back to index)
http://gfretwell.com/ftp/Chinese%20Drywall/
I will make up some HTML when I get a chance but these are the pictures if you want to browse.

Basically anything covered was OK (including under screws). Brass and copper was affected, steel and aluminum didn't seem to be. You could get the black stuff off the wire with your fingernail. Note the bus bars and lugs in the panel look brand new. (aluminum alloy)

Plumbing fixtures took a hit as did a set of brass keys hanging on the wall.

This house was abandoned at final trim and sat empty for well over a year.
_________________________
Greg Fretwell

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#190061 - 11/04/09 04:51 PM Re: Chinese drywall house [Re: gfretwell]
HotLine1 Offline

Member

Registered: 04/03/02
Posts: 6785
Loc: Brick, NJ USA
Interesting....I have not seen any of this up here...yet.

Thanks for sharing, Greg
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John

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#190064 - 11/04/09 07:58 PM Re: Chinese drywall house [Re: HotLine1]
KJay Offline
Member

Registered: 11/27/07
Posts: 763
Loc: MA, USA
I wonder what kind of condition the AC evap coil is in. Iíve heard there has been a lot of issues with formicary corrosion and pin hole leaks occurring in them because of the off gassing from that crappy Chinese drywall. Iím betting the corrosion would have been a lot worse at the sink faucets and drains if water had been contacting the metal daily from use by occupants.

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#190065 - 11/04/09 08:08 PM Re: Chinese drywall house [Re: KJay]
gfretwell Offline

Member

Registered: 07/20/04
Posts: 9012
Loc: Estero,Fl,usa
The evaporator is trash. I just didn't have time to open it up.
_________________________
Greg Fretwell

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#190073 - 11/05/09 05:37 AM Re: Chinese drywall house [Re: gfretwell]
Alan Belson Offline
Member

Registered: 03/23/05
Posts: 1801
Loc: Mayenne N. France
I assume the gypsum in this sheetrock has an excess of sulfuric acid in it - much gypsum plaster is now made at the top of coal-fired power station chimneys by converting the sulfur pollutants into acid, then 'killing' with limestone. Full of uranium too, from the coal. Try a geiger counter next visit Greg! sick

http://www.cez.cz/en/power-plants-and-environment/coal-fired-power-plants.html
_________________________
Wood work but can't!

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#190074 - 11/05/09 06:17 AM Re: Chinese drywall house [Re: Alan Belson]
Trumpy Offline

Member

Registered: 07/05/02
Posts: 8530
Loc: SI,New Zealand
The sooner everyone starts using DIN Rail stuff, the better. clap
_________________________
Let's face it, these days if you're not young, you're old - Red Green grin

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#190078 - 11/05/09 07:44 AM Re: Chinese drywall house [Re: Trumpy]
NORCAL Offline
Member

Registered: 09/25/02
Posts: 805
Originally Posted By: Trumpy
The sooner everyone starts using DIN Rail stuff, the better. clap



Why go to stoneage gear??? whistle Might work here if we went back to 120V service. crazy

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#190085 - 11/05/09 02:59 PM Re: Chinese drywall house [Re: NORCAL]
johno12345 Offline
Member

Registered: 09/13/05
Posts: 93
Loc: United Kingdom
This is a new one on me, are you saying that corrosive gasses have been liberated from the drywall and that has caused the corrosion?

If so, thats rather alarming!
_________________________
I took my time, I hurried up, The choice was mine, I didn't think enough

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#190086 - 11/05/09 03:45 PM Re: Chinese drywall house [Re: johno12345]
gfretwell Offline

Member

Registered: 07/20/04
Posts: 9012
Loc: Estero,Fl,usa
Yep John, that is the problem. China used fly ash from coal plants to make the drywall, as some US plants do, but their coal is a lot dirtier and the sulfur in the coal creates a SO2 out gassing from the drywall. It is still not clear how long it takes for it all to come out but during the time it does it eats anything copper. I do think, eventually it would reach a safe level but by then it is too late. nobody is going to take a chance on it.
_________________________
Greg Fretwell

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#190111 - 11/06/09 05:40 PM Re: Chinese drywall house [Re: gfretwell]
mbhydro Offline
Member

Registered: 02/21/03
Posts: 340
Loc: Winnipeg MB Canada
I got this off of a HVAC forum that I also frequent:

http://www.chinesedrywall.com/

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