ᐅ Construction of a Dutch gable and roof?

Hello,

I am planning to build a one-and-a-half-story captain’s house with an architect on our family property. To keep costs lower and get a better idea of what I actually want, I started creating a 3D model of the house using SketchUp.

This has been very helpful and is going quite well so far.

I have now reached the upper floor, and here it becomes tricky with the knee wall, gable roof (35 degrees), and captain’s gable. I have not been able to find out how such a captain’s gable is constructed or how it affects the interior living space. I have attached two pictures with dimensions and comments:

The following house served as a reference (mine should look quite similar):


Now my 3D version — with some dimensions that might help.

Here I try to explain the issue:

Unfortunately, I have not found any construction plans for such a gable online, nor any photos of the interior. Maybe I can get some tips or photos here that will help with the design.

One note: The diligent staff at the building authority have so far been unable to provide information on the eaves height or ridge height. Therefore, the dimensions are not entirely fixed. Measured from the underside of the slab to the roof, the approximate eaves height is 4.5m (15 feet) and the ridge height is about 8m (26 feet). The house will not be built in a new development but on the plot of a large, dilapidated barn in a small village near Hanover. What do you roughly think, are these dimensions realistic? Are there any regulations at all for such building plots? After all, it will only become a building lot.

Regards

You can use the area behind the green wall, which you marked in purple.

Inside: We have a standard room in such a gable, measuring 3 x 4 meters (10 x 13 feet) without sloping ceilings. The two walls marked "this won’t work" extend about 4 meters (13 feet) into the house. They are standard load-bearing interior walls, 11.5 cm (4.5 inches) thick. The ceiling height is 2.5 meters (8 feet 2 inches), and the ceiling is constructed like the rest of the upper floor as an intermediate ceiling with insulation. However, our gable is not double-layered; instead, it is clad on both sides with wood and slate panels. This means our exterior wall in that area is thinner, although it has the same insulation.

I don’t know how to build it as a double-layered wall, but at least on the outside section you need the full wall thickness, and inside the bricks must rest on something.

The area mentioned by @kbt09 is fully usable in our case.

Architect fees do not become lower just because you bring your own drawings. I have not dealt with the design of captain’s gables yet. In this regard, I suggest you use a reverse image search to identify which house model your façade image belongs to and then study the floor plan there. I assume that only the brick cladding is continuous here, and instead of a wall in this area, a wooden structure designed with the roof frame is used (as is common with dormers). From your description of the plot, I understand that it is at least a §34 area, if not an outer development zone. Both are complex; in the latter case, building there may even require an agricultural operation. As an ambitious amateur, you will likely make little progress with this.

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