I used 15 rolls of this duct insulation - the 6 and 8 inch - to repair existing ductwork in a very confined crawl space in my 40 YO house. That meant the insulation wrap had to be cut. Here, it is important to have very sharp scissors to prevent snagging and tearing. Other than that, it was very easy even in the limited work space. After cutting the wrap lengthwise, the insulation was laid over the duct, then the wrap was laid over and pulled onto place. Using flexduct tape, put 3 strips - one at each end and one in the middle to make a temporary hold Then ran tape the length of the seam. Simple as that. Installation on new ducts would be even easier since no cutting would be required. The insulation quality is very good and the outer wrap is strong yet very flexible. I highly recommend this for anyone to use and the price was very reasonable. This was my first try at doing the ducts and, for just a diy-er, it went very well.
18out of18found this review helpful.
Review 2 for 6 in. Diameter R-6 Ductwork Insulation Sleeve
I agree with the previous comments regarding trying to cut and tape this over existing ducting. It probably works pretty well if you can just slide it over a piece of duct before assembly. For retrofit work, I'd suggest buying foil backed batting and cutting to size instead.
Pros: precut to size
Cons: Difficult to Install
2out of2found this review helpful.
Review 3 for 6 in. Diameter R-6 Ductwork Insulation Sleeve
I bought 6 rolls of the 8" to cover my old duct work. I did as one reviewer did and cut the sleeve instead of taking the duct apart. This is not an easy project to do by your self. The foil wrap on the sleeve is very fragile and tears easily. It might be easier to take the duct apart. But if I do my other ducts in the house, I will just tear out the old and use new 8" flexible ducting. Its R8 rated AND cheaper. Live and learn, but for me this product is a never buy it again item.
Cons: Difficult to Install, Difficult to Use
3out of4found this review helpful.
Review 5 for 6 in. Diameter R-6 Ductwork Insulation Sleeve
As a previous reviewer mentioned, this stuff needs to be cut to install on existing duct work. Also as he mentioned, forget about trying to tape the foil cover to the fiberglass - tape won't stick to fiberglass. After a couple of tries, I ended up sliding the foil cover over the duct first, using a small piece of tape to hold it in place if necessary. Then I slid the fiberglass between the duct and the foil. Once things are lined up, tape the seams. A second pair of hands would have been helpful in some places, but I did most of it alone.
Pros: Great Value, High Quality, Economical
3out of4found this review helpful.
Review 6 for 6 in. Diameter R-6 Ductwork Insulation Sleeve
This product comprises a 6' long tube of aluminum foil, surrounding a sheet of fiberglass wool. To fit to new ducts, you pull the tube over the duct and tape into place prior to installation.
I was in the position of having to fit to existing ducts. Instructions tell you to first secure the foil to the fiberglass with tape, then split the aluminum cover lengthwise; the fiberglass is already split so you're forming a two-layered sheet. Wrap this sheet around the duct and tape it closed.
In practice, I found this to be immensely difficult and frustrating. Does adhesive tape stick to fiberglass wool? Not hardly, so the foil and fiberglass keep coming apart and going separate ways. Like in 99% of houses, my duct-work is in awkward, hard to get at places, so I was at screaming point in no time at all.
My options; 1. wait until I have at least one other pair of hands to help, 2.disassemble the ducts and treat as a new installation, keeping the foil wrapper intact, or 3. return the three unused packets for refund. I'll probably go with #1, but I wish I'd known that fitting to existing ducts is NOT a one-person job before buying the product.