Thomas Tall Roof Raise

[DrakeTruber]

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.

[NovaTRON]

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

[shaymcquaid]

Did 14.5" raise Thomas MVP-ER. Angled walls are a non-issue. Good Luck.

[BarnYardCamp]

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.

[NovaTRON]

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.

Originally Posted by BarnYardCamp

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.

[enigmamdw]

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.

[o1marc]

Originally Posted by enigmamdw

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?

[TaliaDPerkins]

Making the sin measure bigger and not changing the cosine means the angle from vertical is less steep.


More or less.

[DrakeTruber]

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.