exhaust-ventframinghvacstudsvent
I want to do what these people have done here:
The problem is I have bracing going diagonally and it is not leaving enough space for the 4" aluminum duct vent.
Can I saw the bracing off for the 1 section where I need to pass the pipe?
I assume not..
What else can I do ?
The warmer air exhausted from the bath entering a cold environment will condense and create moisture. It will create high humidity which will lead to mold growth. this will become a health issue as well as rot the wood. You want to vent it to outdoors, never indoors.
You would use a coupling tape and hose clamps. You use thin flex aluminum duct like shown in picture but I like to stick with the semi rigid flex duct. Zip ties can be used on thin stuff but not semi rigid.
Best Answer
I wouldn't build it that way in the first place. Hiding a dryer duct within a wall and venting it through the roof (I'm guessing here, but that's what it looks like to me) is just begging for nobody to clean it until it eventually catches fire and burns the house down.
I recently re-did my utility room and discovered an in-wall rigid steel duct just like the one in your picture which vented through the roof. Clearly nobody ever cleaned it due to the annoyance of having to get up on the roof, and as a result it was entirely blocked by lint and dust, with a bunch of creepy-crawlies living in it due to disuse and abundant organic material during an unoccupied period. Not only that, but a section of the ducting had gotten open and was depositing moist air right into the wall cavity, which eventually invited termites into that wall:
Do the world a favor and don't hide your dryer ductwork inside a framed wall and vent it through the roof!