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Old 08-29-2019, 09:37 PM   #1
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CelesteTheBus's Avatar
 
Join Date: Aug 2019
Location: Northern California
Posts: 1
Year: 1968
Coachwork: Carpenter
Chassis: C40
Rated Cap: 24
Single Pane Drop Sash Windows

We seem to have a unique creature. She is a 1968 Chevy C40 with a Carpenter body. And she has single pane drop sash windows, meaning the entire window is one solid piece that slides down into the body wall of the bus.

We were hoping to keep the original windows, at least initially, but they're going to make insulating the walls a bit tricky.

Has anyone else encountered these? What did you do? Any thoughts or suggestions, aside from replacing them?


Thanks!
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Old 08-29-2019, 09:49 PM   #2
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Join Date: Sep 2018
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Year: 2007
Coachwork: Thomas Built
Chassis: Minotour
Engine: Chevy Express 3500 6.6l
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Originally Posted by CelesteTheBus View Post
We seem to have a unique creature. She is a 1968 Chevy C40 with a Carpenter body. And she has single pane drop sash windows, meaning the entire window is one solid piece that slides down into the body wall of the bus.

We were hoping to keep the original windows, at least initially, but they're going to make insulating the walls a bit tricky.

Has anyone else encountered these? What did you do? Any thoughts or suggestions, aside from replacing them?


Thanks!
Build a wall inside the bus. Use 2x2s. Then you can insulate. Drawback is you’ll lose 3”
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Old 08-29-2019, 11:13 PM   #3
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Join Date: Jun 2016
Location: Orange County, CA
Posts: 849
Year: 1990
Coachwork: integral
Chassis: Crown Supercoach II (rear engine)
Engine: Detroit 6V92TAC, DDEC 2, Jake brake, Allison HT740
Rated Cap: 37,400 lbs GVWR
All Crowns use their unique Dry Wall design where their single-pane windows drop down seemingly inside the wall, but actually it's between an outer steel ribbed section and the inner wall which then becomes the outer wall further down. This means that you cannot put anything through the wall for the first foot or so below the bottom of the window, so any extra wall insulation must go on the inside. I use 1/2" polyiso sheet behind 3/8" plywood, and this also just happens to make a perfect 90-degree angle to the floor which will help when I build cabinets inside - Crown's walls are not straight, which can make converting them a royal PIA.

Your bus's windows require an effective wiper seal between the glass and outer wall, otherwise water will get down inside the wall with resultant problems. I suggest replacing all those seals before you do anything else. You can easily make new seals from 1/16" or 3/32" EPDM rubber that Grainger sells.

John
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Old 08-30-2019, 06:26 AM   #4
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Join Date: May 2009
Location: Columbus Ohio
Posts: 11,878
Year: 1991
Coachwork: Carpenter
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window felts.. they are still made for classic cars.. you can buy them and mod them to fit your bus.. you may have to pull the windows to get them in.. we had to whemn working wit ha friend's wayne with the same type windows.. when we did his wayne we were able to change the stops while the walls were apart so the windows went down another 2" or so before they bottomed on the cross member in the body..



I cut up window felts for a G-body chevy monte carlo because reporoductions are still made.. we had to use quite a few but pretty much got his windows sealed..we also put a rubber seal in under the felt so when the window is fully closed it closed up against the rubber as a double seal..
-Christopher
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