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does building paper require clearance protection?

Yikes

SAWHORSE
Joined
Nov 2, 2009
Messages
4,098
Location
Southern California
A few months ago, I posted on the mechanical forum asking about type 2 clothes dryers in apartment laundry rooms.
https://www.thebuildingcodeforum.com/forum/threads/what-defines-a-type-2-gas-clothes-dryer.26286/

The owner was not able to give me a definitive response as to the future type of dryers, therefore the inspector wants me to assume Type 2 dryers with 4" exhaust. UMC/CMC Table 303.10.1 requires minimum 2" clearance to combustibles for class 2 dryers.

Now for my building code question: when the dryer duct goes through a conventional 2x6 exterior wall, the stucco has 2 layers type D-60 minute building paper. Is this paper considered a "combustible"?

More specifically, due to the 2" clearance, will I need an 8" hole in the stucco finish to install a 4" diameter dryer vent termination?
 
Just remove the paper within 2 inches of the vent and use a piece of sheet metal as backing for the stucco.
 
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