International Code

[duct dr]

Can anyone share some insight on the International Code requiring 2" ductboard in the future? I've heard rumors about this but have'nt been able to get a "yes or no".

[Toolpusher]

International ?
are you working on a qoute for over seas ?

The next city over has gone to an R-6 instaed of R-4.
For unconditioned space inside the building envelope.
No one here stocks R-6, It's 45 miles away.
And about 17% more cost.

So anything is possible.

[duct dr]

Toolpusher, in the Gulf Coast area they've adopted a new "international" code, lots of changes due to the high humidity, and bad storms. Been hearing talk about going to 2" ductboard, but no one down here stocks it. When you can find it the cost is sky high. I'm just trying to figure out if they're goin to really push the issue of using the thicker, more costly board.

[condenseddave]

Originally posted by Toolpusher
International ?
are you working on a qoute for over seas ?

The International Mechanical Code is used all over the US.

[Toolpusher]

I was making a fuuny with the comment guys,

BTW, I was wondering why so many people in the souhth use ductboard when moisture is an issue.
Seems it would have more of a chance to have mold problems then metal.

[sadlier]

Current code requires at least R-5 in an unconditioned space. 1" ductboard is only about R4.3. 1.5" ductboard must be currently used to meet code unless it has duct wrap.

[duct dr]

Good question Tool, the answer is this...cost of metal here is way up, also metal dosent mix well with the salt content in the air. Tends to rust after just a few years. And I have actually seen more mold in metel duct than in ductboard, but havent figured that one out yet.

[duct dr]

They havent made us do that here as of yet sadlier, but I know its only a matter of time. Thanks for the info.

[Toolpusher]

Metal is way up allover, But I can still use metal and wrap it when need be. And still be the same as D.B.

The only advantage I see is time. But wraping doesn't really take all that long.
My big plus to wraping it is I don't itch allnight after I get home.

[duct dr]

Very true tool, very true. (scratch scratch)

[1manband]

R-8(2") has been code here for a while now in unconditioned space, envelope or not. I have yet to see it enforced with ductboard ??? I have no idea why! The commercial guys (ductboard) just get away with it. I am not a fan of ductboard, I am a fan of steel in our climate, Seattle. Right or wrong just the way I was raised in the business, no flex either except for the last five feet.