I wrapped the encapsulated R13 around a duct that connects through an
un-insulated garage. Then I wrapped duct tape around it. The duct is round,
about 3 inches circumference. I'm concerned that when the heating season
begins that this will be a fire hazard. Is this a danger?

Billy wrote:
I wrapped the encapsulated R13 around a duct that connects through an
un-insulated garage. Then I wrapped duct tape around it. The duct is round,
about 3 inches circumference. I'm concerned that when the heating season
begins that this will be a fire hazard. Is this a danger?

Doesn't sound like it should be a problem. I'm assuming the 3 inch duct
(4" duct is standard) is metal. Just make sure your duct tape didn't
compress the insulation or it'll reduce the R value. They do make an
insulating product which you simply slide over the pipe. R-13 is a bit
overkill for duct insulation depending upon where you are.

-al sung
Rapid Realm Technology, Inc.
Hopkinton, MA