A thrilling question about furnace and ductwork replacement
March 31, 2010 2:43 PM Subscribe
Getting a new furnace with a side order of asbestos abatement funtimes! Do we need new ductwork too?
posted by clavicle to home & garden (3 answers total)
We're about to have our broken 1940s-era gravity furnace replaced with a forced-air furnace. Hooray. We're getting a bunch of estimates and have heard a couple of different things so far about what we need done with the ductwork.
The existing ducts have asbestos wrapping. One contractor says that the tape is something like 7% asbestos and does not need to be messed with, but pointed out a panel somewhere in the ductwork that he says is 92% asbestos and needs to go. Another one doesn't mention percentages, but says the tape is friable and all the ducts have to be replaced. Their estimates differ accordingly. Yet another contractor says we can keep the half of the ducts that aren't wrapped. It sounds like we're going to need the asbestos abatement no matter what, but who's right about the ducts?
Extra credit: It's true, the tape on the ducts is sort of crappy and torn-looking. Google results suggest it's ok to encapsulate fraying asbestos tape with duct tape or possibly spray paint. Is this true or bullshit? Is the asbestos percentage a factor here?