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Old 08-17-2018, 11:56 PM   #1
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Fiberglass Roof Raise Transition

I don't have a bus yet, but while daydreaming about how I'll do it when the time comes....
Has anyone used fiberglass to close in the roof transition on a roof raise? I have nothing against sheet metal but I'm just thinking about alternatives. Maybe cover the frame work with some large mesh screen or C-Flex and build up with the fiberglass cloth and resin to the desired thickness.

Anyways, just looking for any thoughts.

Thanks,
Andy
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Old 08-18-2018, 09:41 AM   #2
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Originally Posted by Lamacose View Post
I don't have a bus yet, but while daydreaming about how I'll do it when the time comes....
Has anyone used fiberglass to close in the roof transition on a roof raise? I have nothing against sheet metal but I'm just thinking about alternatives. Maybe cover the frame work with some large mesh screen or C-Flex and build up with the fiberglass cloth and resin to the desired thickness.

Anyways, just looking for any thoughts.

Thanks,
Andy
Stu & Filo T used fiberglass for theirs.
IIRC he said if he were going to do it again he'd go with steel.
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Old 08-18-2018, 12:21 PM   #3
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Fiberglas is a very messy job. It would take considerable more time than a quick skin in sheet metal. Many more steps involved with FG.
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Old 08-18-2018, 02:32 PM   #4
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I guess its the heat and humidity, but the stuff doesn't seem to hold up too well in FL.
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Old 08-18-2018, 03:01 PM   #5
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Originally Posted by EastCoastCB View Post
I guess its the heat and humidity, but the stuff doesn't seem to hold up too well in FL.

That must really suck for all of the people with fiberglass boats there.......

My first bus had fiberglass caps. They have been in service for 28 years with no trouble yet.

Maybe Stu will chime in here and share his experience.

If I were going to tackle something like that I would look at using the foam sheets used in boatbuilding to provide the form and glass them over just like building a boat.
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Old 08-18-2018, 03:09 PM   #6
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I have nothing against fiberglass (when it is done right) but personally don't like mixing materials. They will never flex or respond to heat & cold the same.
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Old 08-18-2018, 03:16 PM   #7
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That must really suck for all of the people with fiberglass boats there.......

My first bus had fiberglass caps. They have been in service for 28 years with no trouble yet.

Maybe Stu will chime in here and share his experience.

If I were going to tackle something like that I would look at using the foam sheets used in boatbuilding to provide the form and glass them over just like building a boat.
There is a huge industry here fixing fiberglass boats.
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Old 08-18-2018, 04:49 PM   #8
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This is an interesting read :
https://www.boats.com/resources/shifts-in-fiberglass/



This one has a little more info regarding foam/glass construction:
http://amateurboatbuilding.com/artic...ich/index.html
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Old 08-18-2018, 05:23 PM   #9
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My "commercial series" Blue Bird from 2000 has fiberglass caps over the driver and for the entire back wall. These parts are stamped from sheet metal in a school bus body -- I have no idea why Blue Bird chose different materials for the commercial series.

As much fun as it would be to buy an english wheel and make myself some replacement parts with steel, I'll be cutting and modifying the original fiberglass parts instead. I've never worked with fiberglass before so it'll be a learning experience for sure.
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Old 08-18-2018, 06:11 PM   #10
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Fiberglass boats in Florida absolutely have their share of problems. Shopping for a used boat it can be hard to find one that doesn't have delamination in heavily trafficked areas. This leads to 'soft spots" that can spread rapidly and compromise the structure and water-tightness. The Florida sun and salt water will consume everything given enough time.
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