The frame posts are also taken into account

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This method is a variation of 1. when planning. In this version, the outer posts on one side are higher, and on the other they are lower by a certain height.
With the same height of the walls, vertical posts of the required height are installed on one of the walls. At first glance, such a structure is unstable, since the rafter triangles have free movement to the right and left. But this flimsiness of the structure is eliminated by installing the frame lathing and covering the front part of the roof with wood.
You can use single-pitched trusses. This method is quite ghana mobile database in that you can build one truss, adjust it to the required dimensions and use it as a template. And using the template, you can build the remaining trusses on the ground. There are ready-made rafter trusses. They are ideally suited to any type of roof. For them, it is enough to only install and secure them to the wall plate. Then you can freely sheathe the single-pitched roof with lathing.
When building an extension near a house, this method is used. In this case, on one side of the extension, posts or a wall can be planned, and on the other, we already have a capital wall of the finished building. Fastening to it can be done with a well-fixed horizontal run or individual fasteners, also aligned horizontally. All fastenings on the wall of the building are made higher than the posts or wall of the opposite side.
We determine the side of the roof slope
The question often arises: in which direction should the roof slope be determined? In the case of an extension to a house, there are no special options. The slope is made in the direction away from the building to ensure free water flow during heavy rains.

If a separate building is planned, then here you can choose the side. Basically, the slope is located on the back of the building. Although there are cases when the slope is made on the front side. In such a situation, the choice is based on the design style of the building, the territorial features of the site, which side is more convenient to lay the communications system, and so on.

But in this case, some nuances should not be overlooked:

It would be more correct to place a single-pitched roof on the windy side. In this way, the impact of the wind is minimized. After all, the wind directed at the roof with a small angle has practically no effect on it.
For a rectangular building, you can choose the location of the slope along or across. But here you need to remember that the rafters of a pitched roof cannot have an unlimited length. For a certain distance, they need to be reinforced. According to the rules, the free size of the rafters is 4.5 meters. When installing a rafter system up to 6 meters, a purlin leg is required. It is placed at an angle of 45 degrees on the support beam.