Formation of the rafter system of the extension

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The Mauerlat is extended to the required length beyond the walls of the building.
Additional elements – fillies – are attached to the outer rafters.
Note: Accordingly, the lathing for the roofing is then made!


Extensions to the house can have different parameters, and with a span width of less than 4000 mm, a classic scheme with rafter support on two bearing points can be used. However, with wider buildings (˃4000 mm), it will be necessary to install braces that rest against the wall of the building.

A mauerlat made of 100×150 germany mobile database timber is laid on the outer wall of the extension. The part is fastened using the selected method (on studs, anchors); in a wooden structure, the part is not mounted using the upper crown of the wall as a support for the rafters.
In the opposite wall of the house, for the rafters, it is necessary to prepare nests for the size of the rafter in the thickness of the wall (such grooves can be made at the stage of laying).