Rafter system of the attic floor

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Construction of the attic floor (loft)
Next we proceed directly to construction work or reconstruction (remodeling the attic into a mansard floor). For those who want to remodel the attic into a mansard, it is necessary to dismantle the old covering.

Then the rafter system is installed, for which you will need:

log (diameter not less than 180 mm) or timber (preferably glued, dimensions 80x80 or 100x100);
board (40x1500) for lathing;
hardware, annealed wire, anchors or reinforcement. In order to securely fasten all elements;
floor beams. The finished floor will be laid on them;
a ready-made staircase to the attic floor. It can be located outside the attic or inside. External placement creates inconvenience when using it in the cold season and in the rain. Internal placement steals the useful area of ​​the lower floor. A spiral staircase can serve as a compromise. Even in the smallest room, a compact folding or retractable staircase can be installed.
roofing material;
protective films;
thermal insulation material;
material for finishing walls and ceilings.
Stairs to the attic floor

The rafter system device begins with the china mobile database of the mauerlat, then the rafter legs are assembled and installed. It is easier to assemble them on the ground. The installation begins with two opposite legs. Then a rope is pulled between them. It regulates the accuracy of the installation.

Rafter system of the attic floor

After the rafter system frame is installed, the legs are fastened together. That is, the lathing is nailed. The lathing pitch depends on the type of roofing material.

Recommended: step-by-step description of the technology for installing a mansard roof on a private house

The process of building an attic floor - video
The frame is ready. A correctly executed roofing pie has the appearance shown in the figure.

Windows on the attic floor
Dormer windows are installed between the rafters. To make the fastening more reliable, horizontal crossbars made of timber are installed in the place where the window is installed (at the top and bottom of the rafter system).