Fastening Insulation Over Metal Ductwork - HVAC - DIY Chatroom Home Improvement Forum


Go Back   DIY Chatroom Home Improvement Forum > Home Improvement > HVAC

CLICK HERE AND JOIN OUR COMMUNITY TODAY...IT'S FREE!

Reply
 
Thread Tools Display Modes
Old 10-17-2010, 10:05 PM   #1
Member
 
Join Date: Jan 2010
Location: mississippi
Posts: 79
Rewards Points: 75
Default

fastening insulation over metal ductwork


I'm planning to remove the insulation over some metal ductwork, seal the seams, and then reattach the old insulation. I noticed the insulation was fastened with staples. I wonder if such staplers are available at big box and not very expansive. Or are there other ways to fasten the insulation?

Advertisement

deerhunter is offline   Reply With Quote
Old 10-17-2010, 10:33 PM   #2
nap
You talking to me?
 
nap's Avatar
 
Join Date: Dec 2007
Location: sw mi
Posts: 5,407
Rewards Points: 2,000
Default

fastening insulation over metal ductwork


Quote:
Originally Posted by deerhunter View Post
I'm planning to remove the insulation over some metal ductwork, seal the seams, and then reattach the old insulation. I noticed the insulation was fastened with staples. I wonder if such staplers are available at big box and not very expansive. Or are there other ways to fasten the insulation?
the staples aren't anything special. Just an old Bostich stapler will work fine. After you staple the insulation, you should use aluminum tape to actually seal the seams.

Advertisement

nap is offline   Reply With Quote
Old 10-18-2010, 05:42 AM   #3
An old Tradesmen
 
Join Date: Oct 2008
Location: PA
Posts: 26,419
Rewards Points: 4,488
Default

fastening insulation over metal ductwork


The stapler normally used. Is a bend out stapler(bends the ends of the staple out, instead of in towards each other).
beenthere is offline   Reply With Quote
Old 10-21-2010, 10:50 PM   #4
Member
 
Join Date: Jan 2010
Location: mississippi
Posts: 79
Rewards Points: 75
Default

fastening insulation over metal ductwork


Is it OK if I skip the staples and just fasten the insulation by wrapping duct tape around it? I visited the bigbox and they don't seem to carry the kind of stapler.
deerhunter is offline   Reply With Quote
Old 10-21-2010, 11:07 PM   #5
HVAC / Plumbing
 
Join Date: Feb 2009
Posts: 1,801
Rewards Points: 1,000
Default

fastening insulation over metal ductwork


You would have to have an outward clinch staple gun. You could use the metal backed tape. Don't know if regular duct tape will hold or not
kenmac is offline   Reply With Quote
Old 10-21-2010, 11:21 PM   #6
nap
You talking to me?
 
nap's Avatar
 
Join Date: Dec 2007
Location: sw mi
Posts: 5,407
Rewards Points: 2,000
Default

fastening insulation over metal ductwork


do not use duck/duct tape. It is not intended for this and does not have the longevity required of the materials for this purpose.



http://cgi.ebay.com/ws/eBayISAPI.dll...=263602_304652


If you can hold the insulation in place well enough to be able to tape it, I would be ok but chances are you are not going to be able to do a decent job.

Did you use mastic on the joints and seams?
nap is offline   Reply With Quote
Old 10-22-2010, 05:09 AM   #7
An old Tradesmen
 
Join Date: Oct 2008
Location: PA
Posts: 26,419
Rewards Points: 4,488
Default

fastening insulation over metal ductwork


Duct tape is great for everything, BUT duct work and duct insulation. Use UL approved foil tape.
beenthere is offline   Reply With Quote
Old 10-22-2010, 12:27 PM   #8
Member
 
Join Date: Jan 2010
Location: mississippi
Posts: 79
Rewards Points: 75
Default

fastening insulation over metal ductwork


As about duct tape. I mentioned in my other post that the HVAC company that worked our duct system used duct tape extensively for sealing. The major connections of the duct that's connected to the air handler are all exclusively sealed by duct tape. To be fair to the Hvac company these tapes do seem to hold up for the about 4 years time. Still I decided to remove them and use mastic instead.
deerhunter is offline   Reply With Quote
Old 10-22-2010, 01:31 PM   #9
nap
You talking to me?
 
nap's Avatar
 
Join Date: Dec 2007
Location: sw mi
Posts: 5,407
Rewards Points: 2,000
Default

fastening insulation over metal ductwork


well, since duct tape was originally created as "duck" tape but later, and for a reason I do not know, altered to be "duct" tape, I'm not sure how it ever came to be used on ducts at all.

this is from Wikipedia (the all knowing)

Quote:
Usage on ductwork
To provide lab data about which sealants and tapes last, and which are likely to fail, research was conducted at Lawrence Berkeley National Laboratory Environmental Energy Technologies Division. Their major conclusion was that one should not use duct tape to seal ducts (specialty tapes are available for this purpose). (They defined duct tape as any fabric-based tape with rubber adhesive.) The testing done shows that under challenging but realistic conditions, duct tapes become brittle and may fail.[6] Commonly duct tape carries no safety certifications such as UL or Proposition 65, which means the tape may burn violently, producing toxic smoke; it may cause ingestion and contact toxicity; it can have irregular mechanical strength; and its adhesive may have low life expectancy. Its use in ducts has been prohibited by the state of California[7] and by building codes in most other places in the U.S. However, metalized and aluminum tapes used by professionals are still often called "duck/duct tapes".
I found the bolded section particularly interesting.
nap is offline   Reply With Quote
Old 11-03-2010, 10:38 PM   #10
Member
 
Join Date: Jan 2010
Location: mississippi
Posts: 79
Rewards Points: 75
Default

fastening insulation over metal ductwork


I have bought this staple gun. But it seems the staples I bought from Lowes are too narrow to fit into it. On the manual of the staple gun it mentioned some part number from PowerFast, I cannot find the specific part number on line. There are some powerfast staples on ebay, but it's different part number. Can I buy these or do I have to stick to the part number?

I'm really surprised that there isn't a standard for staples. I though I just need to go to Lowes and pick the right specification. Actually, the only specification the manual mentioned is leg size. I thought this is the whole story but apparently, the crown width also matters.


Quote:
Originally Posted by nap View Post
do not use duck/duct tape. It is not intended for this and does not have the longevity required of the materials for this purpose.



http://cgi.ebay.com/ws/eBayISAPI.dll...=263602_304652


If you can hold the insulation in place well enough to be able to tape it, I would be ok but chances are you are not going to be able to do a decent job.

Did you use mastic on the joints and seams?

Last edited by deerhunter; 11-03-2010 at 10:51 PM.
deerhunter is offline   Reply With Quote
Old 11-03-2010, 11:05 PM   #11
Newbie
 
Join Date: Nov 2010
Posts: 4
Rewards Points: 10
Default

fastening insulation over metal ductwork


Well if you got a regular staple gun it probably won't do the trick. You need an insulation staple gun with insulation staples. You can't get them from Lowes. It has to be from a HVAC supply house.
berend is offline   Reply With Quote
Old 11-04-2010, 12:10 AM   #12
nap
You talking to me?
 
nap's Avatar
 
Join Date: Dec 2007
Location: sw mi
Posts: 5,407
Rewards Points: 2,000
Default

fastening insulation over metal ductwork


Quote:
Originally Posted by berend View Post
Well if you got a regular staple gun it probably won't do the trick. You need an insulation staple gun with insulation staples. You can't get them from Lowes. It has to be from a HVAC supply house.
if he bought the staple gun in the link I had provided, it was for ductwork.
nap is offline   Reply With Quote
Old 11-04-2010, 05:20 AM   #13
An old Tradesmen
 
Join Date: Oct 2008
Location: PA
Posts: 26,419
Rewards Points: 4,488
Default

fastening insulation over metal ductwork


Doesn't it use regular T5 staples?
beenthere is offline   Reply With Quote
Old 11-04-2010, 12:06 PM   #14
nap
You talking to me?
 
nap's Avatar
 
Join Date: Dec 2007
Location: sw mi
Posts: 5,407
Rewards Points: 2,000
Default

fastening insulation over metal ductwork


Quote:
Originally Posted by beenthere View Post
Doesn't it use regular T5 staples?
it looks like it might

http://www.thermopan.com/products_powerfaststaple.htm
nap is offline   Reply With Quote
Old 11-04-2010, 03:02 PM   #15
Newbie
 
Join Date: Sep 2010
Posts: 27
Rewards Points: 25
Default

fastening insulation over metal ductwork


Quote:
Originally Posted by deerhunter View Post
I'm planning to remove the insulation over some metal ductwork, seal the seams, and then reattach the old insulation. I noticed the insulation was fastened with staples. I wonder if such staplers are available at big box and not very expansive. Or are there other ways to fasten the insulation?
===========

Have you considered using adhesive insulation pins? See this link to see what I'm talking about.

http://www.alibaba.com/product-gs/32...SIVE_PINS.html

Advertisement

OldSingy is offline   Reply With Quote
Reply


Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
We need more venting and insulation Scott Stevens Roofing/Siding 5 10-15-2010 01:55 PM
New Unfaced Insulation Off gassing something common sense Building & Construction 3 10-07-2010 04:46 PM
Old home insulation woes nowwhatnapster Building & Construction 15 11-03-2008 12:59 AM
Insulation over Attic Walkway BigJimmy Building & Construction 4 06-23-2008 03:13 AM
Insulation for a metal building amy General DIY Discussions 2 04-30-2006 10:57 PM




Top of Page | View New Posts