2603.4 and .5

[Yankee]

What material(s) is best approved for the annular space?

 

[north star]

* * *

Some use the spray-in foam, ...others use left over fiberglass insulation,

...still others use mortar, and still others use the silicone caulking.

What does the AHJ B.O. approve of?

* * *

 

[Yankee]

* * *Some use the spray-in foam, ...others use left over fiberglass insulation,

...still others use mortar, and still others use the silicone caulking.

What does the AHJ B.O. approve of?

* * *

Well that's the question . .. I am the AHJ : ) and I have a relieving arch filled with hydraulic cement.

Not sure what the point of the relieving arch is if filled with that.

 

[TimNY]

I would agree with you Yankee. If this is exposed on the inside, expandable foam is not waterproof and fiberglass will get wet. I see silicon caulk usually. It can be backed with foam, but the side from which water may infiltrate is sealed with silicon.

 

[north star]

* * *

Yankee,



In our AHJ, the contractors use almost anything to seal the ' annular spaces '.

Not saying their choice of materials is correct or even approved, but that is

what I typically see.

The annular spaces should be sealed to prevent the intrusion of pests,

vermin, water and other substances that will be detrimental to the

interior spaces.



I would probably go with inserting the fiberglass first and then sealing

with silicone.

Sorry for any confusion or non-specific answer.



* * *

 

[mtlogcabin]

Depends on what the annular space is around, Fire Damper, Sprinkler Line, Water Line, Electrical Conduit. Are you in a high seismic area.