Diagonal wall under a normal roof?

[MushCreek]

I couldn't think of a title that makes any sense, but I'll try to explain. On one corner of the house I'm planning, I want to put the kitchen sink on the outside corner, diagonally. It occurred to me it would be nice to clip the corner of the house diagonally as well, so the sink user could have a window straight in front of them (her). If I cut a diagonal say 3' across in the outside wall, how do I support the roof above without having to clip it as well? Can I just cantilever it over the missing corner? It would have about 3' unsupported in the corner, not including overhangs. Is there a standard way to do this? Can I make it strong and code compliant, or should I just go back to building a box? What would I do about the foundation- follow the diagonal, or make it square, and put a little 'roof' down below the window to cover the corner?

[Redoverfarm]

Maybe ScottA can give you some ideas on the foundation as he has a diagonal wall in his project. 

[poppy]

That amount of cantilever (assuming there is no second floor to support) should be no problem.  Calculate the load but it should be minimal.

I would think that you would want the foundation to match the walls.

Cantilever construction is an unknown for many, but it is pretty basic and more common than one would think.

[ScottA]

You'd probly want to set beams in both walls so they come our flush with the top plate. For cantilever you generaly want to go 2 to 1, meaning twice as much supported as unsupported. As for what size beam you'd need to give more info on the roof loads etc. But it could be done I'd think.

[MountainDon]

If the object is to have a corner window parallel to the diagonally mounted sink in the corner as viewed from the inside, perhaps all you need to do is have the window set diagonally in the corner with the exterior coming to a normal square corner below and above? That would simplify both the foundation and the roof.

If you want the entire corner cut off diagonally, what type of roof is planned, gable or hip... ? That might make a difference.



Did a paint a good enough word picture?

[MushCreek]

You could just notch out the window, I suppose, but then you'd still have to support the overhead part, and provide a way to shed water on the lower part. The window would be on a corner of a typical gable roof, so you'd have a sloping roof on one side, and the gable on the other. There would be plenty of support inboard of the cantilever. I guess you could have a couple brackets that could be both functional and decorative. The current design (I've had thousands) is a very basic 24 X 40, with an 8/12 roof. No second floor, or at least not in that area. I'm building in SC, so snow load is very light- I think they use 10 or 15 lbs.

Just shooting from the hip here, I would provide most of my support on the gable side, since it would be easier to incorporate a sizable beam without messing with the roof line. The sloping side would then simply connect to, and be supported by the gable beam. We're only talking 3' here; you could probably almost get away without any additional support, but I'm sure it wouldn't meet code. If I clipped the roof as well, it would be a funny little piece of a hip roof. It would look odd, although that doesn't bother me much. Id rather keep it a plain gable roof, though- much easier when working with metal roofing.

I'll most likely be building on a walk-out basement, and this corner would be on the walk-out end, so it will be above ground. I'd like to make the basement out of ICF if I can afford it. If I DIY, the added trouble of a little 3' diagonal would be no big deal.

[MountainDon]

A Google for "corner window" and "diagonal corner window", under images,  produces mostly two windows in a 90 degree corner. This is the only diagonal that came up on a modular home site.    http://canterburycabins.com/index.php?pg=options

[MushCreek]

That's exactly what I had in mind- thanks?