On Thu, 26 Jan 2017 19:57:05 -0500, Alex wrote:
wrote:
On Thu, 26 Jan 2017 11:05:57 -0500,
wrote:
On Thu, 26 Jan 2017 08:52:28 -0500, "Mr. Luddite"
wrote:
Drywall shortages are slowing housing construction. At least in my
neck of the woods.
Wasn't there some kind of health risk problem that arose a few years
back when construction companies started using sheetrock manufactured
and imported from China?
===
Yes, it was a huge problem in high humidity areas like Florida. The
Chinese drywall had a high sullphur content which released sulphuric
acid vapor under the right conditions. That was not only a health
hazzard but also corroded copper wiring and pipes. The only
remediation was to strip out all of the drywall and rebuild the
interior, a very expensive proposition as you can imagine.
I had a friend who had the process down to about $10 a sq/ft and he
did a bunch of them.
Probably just to R&R the drywall. The copper plumbing, wiring, AC
components, etc. would cost far more than that.
If you look at the link from my web page you see the wire itself is
going to be OK as long as you cut off the bad part and strip it again.
In real life you can just scrape off the sulphated part and go but,
technically, some material was removed. The devices should be replaced
but they really were not compromised that much.
Plumbing (pipe) was unaffected because it is virtually all plastic
here. He just replaced the faucets and if they were name brand, they
have a lifetime "finish" guarantee so it is just labor. If you had a
"good" air handler it will have some degradation but if it is aluminum
coil, no problem at all. He was throwing cabinets in the kitchen and
granite counter tops but they were cheap in 2009-10 when this was
going on. The dry walling itself was pretty cheap.
They also sprayed the block with some kind of chemical that
neutralized the S2O