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Old 11-01-2021, 11:10 AM   #1
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Thomas Tall Roof Raise

I'm looking to do a high roof raise on a Thomas bus with the angled walls. 2 / 3 ft raise. Has anyone been able to pull this off? Thanks for your advice on this risky task.
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Old 11-01-2021, 07:47 PM   #2
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My raise was only 18inches, but the slanted walls were of no issue, I don't think going another 6 inches would be a problem.
https://www.skoolie.net/forums/f13/t...e-20894-2.html
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Old 11-08-2021, 02:07 PM   #3
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Did 14.5" raise Thomas MVP-ER. Angled walls are a non-issue. Good Luck.
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Old 11-08-2021, 08:13 PM   #4
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I thought that I had read a post advising to make the cut below the windows...which is below the angle. I have a Thomas...not planning to raise the roof.
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Old 11-08-2021, 08:50 PM   #5
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You do not want to cut below the windows, unless you plan to keep them.
Again, cutting the angled part is no issue at all, the hat channel will flex enough to get them to go where they need to.

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I thought that I had read a post advising to make the cut below the windows...which is below the angle. I have a Thomas...not planning to raise the roof.
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Old 11-19-2021, 04:19 PM   #6
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Thomas saftliner with the same angled section from the windows up to the roof. If you raise in the window area the extensions will take place entirely ‘inside the angled area and it will be a non-issue. I did an 18in raise just joined the cut half channel with 11ga square tube. Simple. Also a bit of math with reveal the higher you go with you’re raise the shallower the angle becomes.
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Old 11-19-2021, 05:35 PM   #7
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Quote:
Originally Posted by enigmamdw View Post
Thomas saftliner with the same angled section from the windows up to the roof. If you raise in the window area the extensions will take place entirely ‘inside the angled area and it will be a non-issue. I did an 18in raise just joined the cut half channel with 11ga square tube. Simple. Also a bit of math with reveal the higher you go with you’re raise the shallower the angle becomes.
How does lengthening a straight line change the angle?
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Old 11-19-2021, 06:23 PM   #8
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Making the sin measure bigger and not changing the cosine means the angle from vertical is less steep.


More or less.
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Old 11-19-2021, 10:24 PM   #9
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Thanks guys for sharing your experiences and thoughts. After reviewing feedback, my plans are to give the roof an 18" raise, and build out a loft level in the back with an insulated tent rig to extend the ceiling height. In hind sight, a 3 foot raise seems pretty silly for a variety of reasons, namely material cost and clearance height.
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