Hello, I'm working on a small endless project and have now reached the step where it's time to consider how best to create a balcony on top of the glass veranda.

The roof is low-sloped: About 5 degrees in one direction and 3 degrees in another - (that's what happens if you're foolish enough not to make the extension exactly twice as wide as it is deep #rookiemistake).

I'm attaching two pictures: one from above showing how the roof slopes (how water is expected to drain off), and of course, I want to avoid water being unnecessarily stopped.

The diagonal black lines show where the roof slope changes, and it intuitively feels wrong to have beams going over these "ridges."

We also want the actual balcony decking to be as invisible as possible (like beams hidden behind the railing posts).

All tips are warmly welcome
 
  • 3D model of a building with a low-sloped roof and a balcony structure with railings. The model includes measurements in millimeters.
  • Diagram showing flat roof slope directions with blue arrows indicating water flow paths, bordered by a railing structure.
Rickard.
A bit unnecessarily complicated to build a hipped roof just to completely cover it, I think, but.

If the height must be kept to a minimum, I can’t come up with a better solution than placing the joists from the long side straight in and then making individual blocks/wedges for support where the roof slopes the wrong way, keep in mind not to make them too small for the sake of the roof.
If you have a lot of height to play with, maybe you can use terrace feet to easily level everything without blocking the water anywhere.
 
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Eriwet
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Rickard. Rickard. said:
A bit unnecessarily complicated to build a mansard roof just to completely hide it, I think.
One could think so. It has undeniably resulted in some extra work and a bit of extra cost, but it definitely looks nicer, partly from the sides where we most often see the extension, but especially the interior ceiling. It might have been possible to make it look nice in a simpler way, but we are very satisfied with how it turned out.

Thanks for the tips, they are in line with how I have thought myself, but it's always valuable to hear it from someone else.
 
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Rickard.
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The neighbor has a similar situation as you. They have placed a thin decking in square sections on the roof, to easily lift and clean. Then, like you (drawn), they have chosen to build a sturdy railing as the only permanent construction. The decking has wooden wedges underneath to make it level (it is numbered so that it will be easy to lay correctly after cleaning as well).
 
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Rickard.
If it's open and neat from underneath, then you haven't concealed it as I suggested, and if you're satisfied with it there, then it's probably the right solution!

What can be done is to "widen the eave" so you get a much wider flat part and shorter and steeper side part, becoming a bit "American porch" once the decking and railing are in place. I'm NOT claiming it's prettier or better in any way, but at least it's a little easier to build decking on without losing the eaves all around.
 
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Rickard. Rickard. said:
If it's open and neat from underneath, then you haven't hidden it as I implied, and if you're satisfied there, then it's definitely the right solution!

What you can do is "widen the hip" so you get a much broader flat part and shorter and steeper side part, becomes a bit "American porch" of it once the decking and railing are in place. I'm NOT claiming it's more attractive or better in any way, but at least it's a bit easier to build decking on without losing the eaves all around.
a little late, the roof is already in place, but I understand your thinking!
 
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