How To Drywall Wall With HVAC Trunk And Pipe Penetrations - Drywall & Plaster - DIY Chatroom Home Improvement Forum

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Old 09-24-2010, 05:08 PM   #1
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How to drywall wall with HVAC trunk and pipe penetrations

I am building a wall separating a utility room from the remainder of the basement. An HVAC trunk, gas pipe and two PVC pipes from the furnace in the utility room penetrate the new wall, entering a soffit on the basement side of the wall. I am drywalling the utility room side of the new wall. A soffit to enclose the trunk and pipes is not feasible in the utility room. I have installed a wood frame in the wall around the trunk and pipes. The wall does not need to be fire-proof, although firestop material (mineral wool) is installed to prevent fire from travelling through the soffit.

How do I make a nice looking joint between the utility room wall and the trunk and pipes? Should I caulk between the edge of the drywall and the trunk? Or use some sort of collar around the trunk? Or do I drywall as close to the penetrating objects as I can? Should I use mud to seal the wall to the trunk and pipes? The trunk is galvanized sheet metal covered with a thin metallic bubble-wrap insulation.

Thank you.

Dave P


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Old 09-24-2010, 06:42 PM   #2
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When it comes to penetrations, I hang and cut the drywall as tight as I can then tape and finish around each penetration, you may have several joints to finish depending on where the pipes are but that's what I do.


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Old 09-24-2010, 08:14 PM   #3
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I have a situation just like yours. I cut the drywall close and lived with the results. I figured if I had a room with exposed ducts and pipes, why should I be concerned about a small gap between the pipes and drywall?
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Old 09-27-2010, 02:15 AM   #4
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you're going to have to skim coat the whole area to make it look perfect. it's possible though, a good mud job can hide multiple butt joints near each other.
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