Running An Exhaust Duct In Existing Condo Inbetween Floors - Help?

 
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Old 12-01-2017, 11:16 PM   #1
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Running An Exhaust Duct In Existing Condo Inbetween Floors - Help?


Hello,

I'm a contractor in So Cal.

I have a client that wants me to run a duct through the ceiling inbetween the second and third floor. It's an exhaust for a dryer.

There's an exhaust for a bathroom that runs parallel to the line I would need to run, so I'm hoping the joists are consistent over that 10'.

My question is: what are the chances that I would run into blocking/other obstructions as I'm trying to run the ducting inbetween the joists?

I have done some work like this, but not a ton.

In the pictures you can see where the dryer is, where the bathroom and other exhaust fan is, where the bathroom exhaust vent is, and where the dryer exhaust vent would go.

I did peek in the can lights but did not pull one to see the joists etc. I could do this if I return.

Any suggestions are much appreciated!

L

PS I decided to post in remodel instead of HVAC, as it has more to do with the joists/blocks etc. If I should move to HVAC, please let me know. I just joined.
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Old 12-02-2017, 08:43 AM   #2
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Re: Running An Exhaust Duct In Existing Condo Inbetween Floors - Help?


No way to know.
Why isn't there one already?

Been there, done that. First stop is Condo association. Be prepared for mucho bool sheet.

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Old 12-02-2017, 08:54 AM   #3
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Re: Running An Exhaust Duct In Existing Condo Inbetween Floors - Help?


He might be a small town guy but thats good big time advise take it
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Old 12-02-2017, 10:29 AM   #4
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Re: Running An Exhaust Duct In Existing Condo Inbetween Floors - Help?


Hope you and the client like drywall work...

If there's an HOA, start with them. HOAs have no shortage of nosy neighbors that'll put a monkey wrench in your plans... better to understand what you're up against beforehand. Plus, if you're lucky, you might get building plans.

Then offer a t&m contract to do exploratory holes in the ceiling. (Promise nothing except holes in the ceiling!) Try to establish if there's a beam perpendicular to the joists or anything else that's going to give you trouble.
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Old 12-04-2017, 11:48 AM   #5
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Re: Running An Exhaust Duct In Existing Condo Inbetween Floors - Help?


Hi Everyone,

Thanks so much for the advice! Very helpful.

I will give him some thoughts, plus a proposal for investigative work.

Luckily, his unit is the one above the floor, so we don't have to deal with upstairs neighbors.

Yours,

L
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Old 12-04-2017, 11:50 AM   #6
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Re: Running An Exhaust Duct In Existing Condo Inbetween Floors - Help?


Also - I have a question:

For investigative work, my thought is to drill a small hole where the vent would be, and then run a fish line through and see how far it goes without obstruction.

Then, I could fill the hole with sikaflex etc. once we're done.

Is that better than starting with cutting holes in drywall?

Yours,

L
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Old 12-04-2017, 04:50 PM   #7
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Re: Running An Exhaust Duct In Existing Condo Inbetween Floors - Help?


You need to get a set of the new Makita X-ray vision glasses. Most of my clients don't understand why I dont have a set either.
Last week did a dog door to exterior set everything up got it perfect height in the stud bay perfect.
Cut out most of the sheetrock and right there 3 gas lines.
I guess what I am trying to say is you could get your liner all the way to the exterior wall then run into something.
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Old 12-04-2017, 10:44 PM   #8
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Re: Running An Exhaust Duct In Existing Condo Inbetween Floors - Help?


Quote:
Originally Posted by Anderson View Post
You need to get a set of the new Makita X-ray vision glasses. Most of my clients don't understand why I dont have a set either.
Last week did a dog door to exterior set everything up got it perfect height in the stud bay perfect.
Cut out most of the sheetrock and right there 3 gas lines.
I guess what I am trying to say is you could get your liner all the way to the exterior wall then run into something.
Gotcha. I have the glasses on back order.

Thanks for the input.

L
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Old 12-05-2017, 09:52 PM   #9
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Re: Running An Exhaust Duct In Existing Condo Inbetween Floors - Help?


You really should get your head up in there to get a good look. Or a good scope camera or something. You are going to need to cut a couple decent size holes to run the duct anyway. You're using solid duct I hope
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Old 12-05-2017, 09:53 PM   #10
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Re: Running An Exhaust Duct In Existing Condo Inbetween Floors - Help?


Quote:
Originally Posted by Morning Wood View Post
You really should get your head up in there to get a good look. Or a good scope camera or something. You are going to need to cut a couple decent size holes to run the duct anyway. You're using solid duct I hope
Gotcha. Yes. I will write the proposal appropriately. Thank you.

L

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