Home |
Search |
Today's Posts |
|
Home Repair (alt.home.repair) For all homeowners and DIYers with many experienced tradesmen. Solve your toughest home fix-it problems. |
Reply |
|
LinkBack | Thread Tools | Display Modes |
#1
Posted to alt.home.repair
|
|||
|
|||
Sealing heating ducts
Last weeks Ask This Old House episode had an item about sealing
heating ducts. They mentioned that you shouldnt use use Duck Tape to do the sealing because the adhesive dries out after a few years. They said to use metallic tape instead. My question is, why doesnt the metallic tape adhesive dry out too? Is it different from that used on Duck Tape? I'm also wondering why I couldnt just use the tape used to seal the joints in Tyvek house wrap. Its supposed to last many many years and it sure is tenacious and sticks to anything. -dickm |
#2
Posted to alt.home.repair
|
|||
|
|||
Sealing heating ducts
"dicko" wrote in message news Last weeks Ask This Old House episode had an item about sealing heating ducts. They mentioned that you shouldnt use use Duck Tape to do the sealing because the adhesive dries out after a few years. They said to use metallic tape instead. My question is, why doesnt the metallic tape adhesive dry out too? Is it different from that used on Duck Tape? I'm also wondering why I couldnt just use the tape used to seal the joints in Tyvek house wrap. Its supposed to last many many years and it sure is tenacious and sticks to anything. -dickm There are thousands of types of adhesives for many different uses. Use the one appropriate for your situation for best results. The Tyvek tape may or may not hold up on sheet metal that is heated. Just don't bitch if it does not work. I doubt an of us here know the proprietary formulations of the different tapes to give you the definitive answer. |
#3
Posted to alt.home.repair
|
|||
|
|||
Sealing heating ducts
"dicko" wrote in message news Last weeks Ask This Old House episode had an item about sealing heating ducts. They mentioned that you shouldnt use use Duck Tape to do the sealing because the adhesive dries out after a few years. They said to use metallic tape instead. My question is, why doesnt the metallic tape adhesive dry out too? Is it different from that used on Duck Tape? I'm also wondering why I couldnt just use the tape used to seal the joints in Tyvek house wrap. Its supposed to last many many years and it sure is tenacious and sticks to anything. -dickm Metal tape is VERY sticky, and has the added benefit of crimping and crunching down on small openings. It's what you should use on ducts. |
#4
Posted to alt.home.repair
|
|||
|
|||
Sealing heating ducts
Don't use duct Tape, it's crap. The metal HVAC tape mentioned about
is what you should use yes. |
#5
Posted to alt.home.repair
|
|||
|
|||
Sealing heating ducts
dicko wrote in
news Last weeks Ask This Old House episode had an item about sealing heating ducts. They mentioned that you shouldnt use use Duck Tape to do the sealing because the adhesive dries out after a few years. They said to use metallic tape instead. My question is, why doesnt the metallic tape adhesive dry out too? Is it different from that used on Duck Tape? Different tape material and glues. I'm also wondering why I couldnt just use the tape used to seal the joints in Tyvek house wrap. You could. You could also use $1 a roll Mainstays clear tape from Wal- Mart. Tyvek house wrap is for Tyvek. Its supposed to last many many years On Tyvek I bet you're right. and it sure is tenacious and sticks to anything. For some period of time, I bet you're right...day, week, month, year, years. -dickm See http://covalenceadhesives.com [HVAC tab] for proper stuff for your application. |
#6
Posted to alt.home.repair
|
|||
|
|||
Sealing heating ducts
In article ,
dicko wrote: Last weeks Ask This Old House episode had an item about sealing heating ducts. They mentioned that you shouldnt use use Duck Tape to do the sealing because the adhesive dries out after a few years. They said to use metallic tape instead. My question is, why doesnt the metallic tape adhesive dry out too? Is it different from that used on Duck Tape? I'm also wondering why I couldnt just use the tape used to seal the joints in Tyvek house wrap. Its supposed to last many many years and it sure is tenacious and sticks to anything. -dickm WAG here but since metal doesn't breathe like cloth, the adhesive isn't exposed to air. That could make a significant contribution to longevity. |
#7
Posted to alt.home.repair
|
|||
|
|||
Sealing heating ducts
Did you read my post? I agree, metal tape is what should be used.
wrote in message ... Don't use duct Tape, it's crap. The metal HVAC tape mentioned about is what you should use yes. |
#8
Posted to alt.home.repair
|
|||
|
|||
Sealing heating ducts
|
#9
Posted to alt.home.repair
|
|||
|
|||
Sealing heating ducts
My concern with Tyvek tape is, would it be a fire hazard?
I know I can put my hand on ducts and not burn myself, but, would you like to explain to the insurace company that, because you were too cheap to spend an extra quarter on a roll of tape that is designed for the purpose of heat ducts vs combustable tape. I can guarantee that duct tape does dry out and break down. Mike Holmes on Homes (canadian show) talked about tape too. They were repairing an issue with the heat not getting to the third floor. 10% of the heat was lost in joints alone!! do the monthly math... worth the trip to the store and back. Busting the drywalls reveiled that a pipe was disconnected and was just blowing in the ceiling and walls. Since i'm on it, they also added insulation around the ducts, which I would love to do since my basement is not finished ... yet. cln |
#10
Posted to alt.home.repair
|
|||
|
|||
Sealing heating ducts
cln wrote:
My concern with Tyvek tape is, would it be a fire hazard? I know I can put my hand on ducts and not burn myself, but, would you like to explain to the insurace company that, because you were too cheap to spend an extra quarter on a roll of tape that is designed for the purpose of heat ducts vs combustable tape. I can guarantee that duct tape does dry out and break down. Mike Holmes on Homes (canadian show) talked about tape too. They were repairing an issue with the heat not getting to the third floor. 10% of the heat was lost in joints alone!! do the monthly math... worth the trip to the store and back. Busting the drywalls reveiled that a pipe was disconnected and was just blowing in the ceiling and walls. Since i'm on it, they also added insulation around the ducts, which I would love to do since my basement is not finished ... yet. cln Dicko; Use UL-181 approved tape only. The rubber backed duct tape of yesteryear is no longer approved for flexible ducting. The UL-181 is a newer standard that uses acceptable adhesives and is used by the manufacturer of flexible ducting to connect collars. It is also advisable to use a "mechanical restraint" on duct connections. A 48" zip tie is used today by the trades to provide the mechanical restratint requirment. When ever you join two pieces of flexible ducting, you must use a metal collar or sleeve to connect them. Duct sealing mastic is also approved for flexibe ducting but it too must have the UL-181 approval. Duct sealing mastic is designed to stay flexible and expand as the ducts are warmed. Approved tapes also have a none permeable [breathing] backing so the adhesives have a longer life than those in rubber backed duct tape [cloth tapes.] Through recent testing it is know that most residential air duct systems have a leakage rate as high as 30%. By providing superior sealing you can cut that to 6%. I hope this is helpful. -- Zyp |
#11
Posted to alt.home.repair
|
|||
|
|||
Sealing heating ducts
On Fri, 23 Nov 2007 13:19:27 -0800, "Zyp" wrote:
Use UL-181 approved tape only. The rubber backed duct tape of yesteryear is no longer approved for flexible ducting. The UL-181 is a newer standard that uses acceptable adhesives and is used by the manufacturer of flexible ducting to connect collars. It is also advisable to use a "mechanical restraint" on duct connections. A 48" zip tie is used today by the trades to provide the mechanical restratint requirment. When ever you join two pieces of flexible ducting, you must use a metal collar or sleeve to connect them. Duct sealing mastic is also approved for flexibe ducting but it too must have the UL-181 approval. Duct sealing mastic is designed to stay flexible and expand as the ducts are warmed. Approved tapes also have a none permeable [breathing] backing so the adhesives have a longer life than those in rubber backed duct tape [cloth tapes.] Through recent testing it is know that most residential air duct systems have a leakage rate as high as 30%. By providing superior sealing you can cut that to 6%. I hope this is helpful. Thanks, It helped a lot. The roll of metallic tape that I have does not mention UL-181 anywhere on the package. I'm going back to the store to search for a roll that is UL listed. -dickm |
#13
Posted to alt.home.repair
|
|||
|
|||
Sealing heating ducts
dicko wrote:
On Fri, 23 Nov 2007 13:19:27 -0800, "Zyp" wrote: Use UL-181 approved tape only. The rubber backed duct tape of yesteryear is no longer approved for flexible ducting. The UL-181 is a newer standard that uses acceptable adhesives and is used by the manufacturer of flexible ducting to connect collars. It is also advisable to use a "mechanical restraint" on duct connections. A 48" zip tie is used today by the trades to provide the mechanical restratint requirment. When ever you join two pieces of flexible ducting, you must use a metal collar or sleeve to connect them. Duct sealing mastic is also approved for flexibe ducting but it too must have the UL-181 approval. Duct sealing mastic is designed to stay flexible and expand as the ducts are warmed. Approved tapes also have a none permeable [breathing] backing so the adhesives have a longer life than those in rubber backed duct tape [cloth tapes.] Through recent testing it is know that most residential air duct systems have a leakage rate as high as 30%. By providing superior sealing you can cut that to 6%. I hope this is helpful. Thanks, It helped a lot. The roll of metallic tape that I have does not mention UL-181 anywhere on the package. I'm going back to the store to search for a roll that is UL listed. -dickm It won't be cheap, but you'll be glad you did. -- The e-mail address in our reply-to line is reversed in an attempt to minimize spam. Our true address is of the form . |
#14
Posted to alt.home.repair
|
|||
|
|||
Sealing heating ducts
must have the UL-181 approval. Duct sealing mastic is designed to stay
flexible and expand as the ducts are warmed. Approved tapes also have a I was at an open house and noticed the duct sealing mastic. Which would be better, tape or mastic? Price or other comparisons appreciated? cln |
#15
Posted to alt.home.repair
|
|||
|
|||
Sealing heating ducts
Here is an interesting PDF with facts on heating ducts
http://www.southface.org/web/resourc.../2duct_q&a.pdf cln |
Reply |
Thread Tools | Search this Thread |
Display Modes | |
|
|
Similar Threads | ||||
Thread | Forum | |||
Sealing up old furnace ducts | Home Repair | |||
sealing A/C ducts & boots by registers | Home Repair | |||
Need to seal off slab heating ducts | Home Repair | |||
Proper way to connect heating air ducts? | Home Repair | |||
Sealing Ducts in damp crawl space | Home Repair |