flex duct support

[ICE]

There is usually a place or two where the strap has folded and is not 1.5" wide. I didn't see that here.
Do you allow cloth strap for duct support?

 

[Keystone]

I frequently see the cloth strapping as pictured and do allow its use. Yes there are times where the straping is folded or pinching the duct, at that point I require the issue to be corrected. More times than not if the duct is pinched it's due to a change in angle and I have no concerns about asking for additional supports and do not encounter resistance.

 

[Keystone]

BTW, those ducts in the attic appear to be R6...

 

[north star]

& : & : &


For a fix to a pinched \ restricted duct, a
Hanger Duct Saddle could be used.

& : & : &

 

[SCBO1]

ICE,
ADC Flexible Duct Performance & Installation Standards:

Flexible duct shall be supported at manufactures supported recommendations, not to exceed 5-feet,
not to have more than 1/2-in sag per foot and can be nonmetallic type straps.

You may be a bit saggy looking at your photos, but maybe it meets the manufactures support guidelines??

 

[ICE]

The picture that I used to open this thread does not show any folded cloth strap. I couldn't see any of that from the access scuttle. Had I crawled the attic I most likely would have found a few. I think that over time there will be folded strap as in this picture.


Just knowing that it can turn out like this is reason enough to deny it.