and........ proceeding to the next paragraph........
:quoting from the same place you did:
The name "duct tape" came from its use on heating and air conditioning ducts,
end quote.....
and........ proceeding to the next paragraph........
:quoting from the same place you did:
The name "duct tape" came from its use on heating and air conditioning ducts,
end quote.....
It is simply because the crap they sell at Wal-Mart is not GI grade (AKA 100 MPH duct tape). I had some I used on dive gear that held up for many years and regularly used under water. You can still buy it at some military type stores but it costs over $10 a roll.
It just is not approved by the testing labs that set HVAC standards and will not meet code anywhere.
That's all pretty brilliant, but all of that has been covered in the thread. Does no one read prior to posting anymore?
The edges of flat roofs, the edges of walls between abutting buildings (to prevent ingress of moisture between them) and around openings in roofs (such as hatches, chimneys and skylights).
SIGH. It was named DUCK tape by GIs who used it to waterproof shipping containers, because 'Water flows off it, like water off a duck's back'.
Ex-urban legend. Plus this was already covered, ad naseum.
Duct tape fans unite!
DUCT tape is made of METAL!
The original product was called 'Duct tape', and while it was great for many uses, with a metalized cloth backing, and a rather thick adhesive, it was tested on actual ductwork, and found severely lacking for this use because the adhesive becomes hard when exposed to heat, and the tape turns loose. However, it has MANY other great uses, and the astronauts on Apollo 13 wouldn't have survived had they not had it along. It can be a valuable asset around the house, as long as you don't try to use it on heating ducts.
The product known as 'Duck tape' is simply a cheap knock-off of the original product, and is, in my experience, vastly inferior.
An aluminum metal tape is also used to seal the seams between the metal-backed foam insulation on homes. The adhesive is permanent, and the tape is pretty expensive as such things go, but it keeps out the wind (and water) well.
Just how do you regard having your duct joints fall apart as desirable? Seems to be a bit of a disaster to me.
Ironically, NOT for ducts. I suspect some fly-by-night heating and air conditioning people used it, and it took that name, but it has been shown to be a very ineffective tape for that application.
Original duct tape didn't have the same adhesive as the current product, and its many imitators.
Also possibly because it was made of cotton duck cloth.
The biggest failure is drying out.
greg
According to :
While perhaps not _quite_ Mil-Spec, you can get a very close equivalent at other places. Lee Valley carries it for example.
Because just like a lot of stuff there is a quality version and a cheepo version designed to be sold in big box stores.
If you go to a real supply house you can buy quality duct tape.
I'm not sure who you were asking, but the tape does not and can not be what holds the ducts together. It is merely for sealing the joint for anal types. Most ducts don't have tape on them.
s
If ducts are made properly, they should be locked together by a folded seam by which the ends of the ducts slide together and an edge is then folded over to lock it all together. Look up "pittsburgh seam" or "pittsburgh seaming" and "ducting" on Google.
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