Cutting 6" Dia. Hole For Wall Cap - General Discussion - Contractor Talk

Cutting 6" Dia. Hole For Wall Cap

 
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Old 05-19-2018, 01:41 PM   #1
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Cutting 6" Dia. Hole For Wall Cap


I'm installing the range hood ventilation before the kitchen gets closed up this week, do you guys recommend buying a 6 1/4" hole saw for cutting the opening for ducting to the outside wall, or would you just use a jigsaw from the outside?

I've seen wall caps mounted directly to the siding, then sealed with caulk. I don't trust sealants that much, so I plan on mounting the wall cap on a PVC trim block cut into the siding, sealing around the perforation, back caulking the flanges, then spray foaming from the inside.

How do you guys go about these?

If you need more info,
- rigid ducting (~5' run) in ceiling joists then vented through the rim joist
- wood clapboard siding
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Old 05-19-2018, 01:54 PM   #2
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Re: Cutting 6" Dia. Hole For Wall Cap


i use a jig saw.

that 6" hole saw is an arm breaker....

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Old 05-19-2018, 01:56 PM   #3
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Re: Cutting 6" Dia. Hole For Wall Cap


Make sure you use Z-metal head-flashing above that trim piece.
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Old 05-19-2018, 02:03 PM   #4
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Re: Cutting 6" Dia. Hole For Wall Cap


thanks fellas
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Old 05-19-2018, 02:27 PM   #5
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Re: Cutting 6" Dia. Hole For Wall Cap


Quote:
Originally Posted by griz View Post
......that 6" hole saw is an arm breaker....
That's why you brace the drill against something solid.
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Old 05-19-2018, 03:07 PM   #6
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Re: Cutting 6" Dia. Hole For Wall Cap


ways to go about. One way I like is to cut a enar perfect hole traced out. Once cut, you can insert the vent / pipe. There is a product called "Solar Seal". It is an excellent sealant for roofing and siding. This is a clear sealant. I seal the perimeter of the opening and the perimeter of the vent flange as well.
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Old 05-19-2018, 04:42 PM   #7
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Re: Cutting 6" Dia. Hole For Wall Cap


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Originally Posted by Pangdev View Post
ways to go about. One way I like is to cut a enar perfect hole traced out. Once cut, you can insert the vent / pipe. There is a product called "Solar Seal". It is an excellent sealant for roofing and siding. This is a clear sealant. I seal the perimeter of the opening and the perimeter of the vent flange as well.
Pangdev, are you suggesting I butt the vent flange to the clapboard siding and seal around the perimeter?
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Old 05-20-2018, 05:19 AM   #8
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Re: Cutting 6" Dia. Hole For Wall Cap


I install the vent block before the siding so it can be flashed properly and side around it. Then cut the penetration in the sheathing when the time comes to do the duct. And for one that big, is use a jig saw. Unless you have a good clutched drill a hole saw that big can hurt you.

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