How to make a crate under the roofing sheeting - device and

The professional sheet is considered a practical, functional material that allows you to cover the roof in a short time. High mechanical strength, resistance to corrosion and other external influences makes this low-cost coating a leader in low-rise residential and industrial construction. Since the profiled flooring is quite simple to install, it is often used in the construction of the roof with his own hands. This process does not cause any difficulties, if you correctly perform the device grounds for the roofing material. In this article we will tell how to do the lathing under the professional flooring, how to calculate the pitch between the slats, and also choose a durable material.

Material selection

A crate is a base on which a roofing material made of wooden slats or metal profiles laid perpendicular to the truss feet is laid. It evenly distributes the load on the rafter legs, preventing deformation of the roof surface. The professional sheet is mounted on a continuous or lattice crate in accordance with the technical characteristics of the material. For the manufacture of this element truss system use:

• Wood Natural wood is the most common material from which the crate is made under corrugated flooring. It is lightweight, durable, thanks to which it allows you to create strong, reliable designs. The device of the base of the tree is made using unedged or edged board 150 mm wide and 40-50 mm thick. The lack of a wooden base lies in the fact that the wood burns, on contact with water it rots, gradually losing strength. To extend the life, the boards are treated with fire safety.
• Metal. In production construction for the organization of the basis under a professional flooring often use metalprofile. Metal structures are not limited in length, but also have greater strength with less weight. The device of the base of the metal allows you to increase the pitch between the elements up to 1-1.5 m. The metal elements in contact with water eventually become rusty, gradually deforming. However, the life of the base metal is longer than that of wooden structures.

Important! The roofing of the profiled sheet begins with the flooring crates. To determine the material, the optimal cross section of the elements and the step between them, you need to do the calculation. The calculations are based on the determination of the load, which transfers the roofing pie to the base of the roof.

Step calculation

The professional leaf is considered durable, lightweight, resistant to mechanical damage by the material, the stiffness of which increases the additional vertical stiffeners. The higher the height of the corrugated wave, the higher its carrying capacity. As a rule, the lathing has a simple device, which depends on the type and weight of the material, as well as on the area and angle of inclination of the slope. The step of lathing under corrugated flooring is regulated by building codes, the calculation is performed based on the roof pitch:

1. If the slope of the roof is 15 degrees or less, for sheeting is mounted solid crate. For the roofing material, related to the bearing type, a lattice construction with a step of up to 400 mm is allowed.
2. If the angle of slope of the roof slopes is in the range of 15-30 degrees, the pitch between the elements of the crate should be 300-650 mm. This is the most common base unit for professional flooring and is suitable for most roofs.
3. If the slope of the roof exceeds 30 degrees, the spacing between the elements of the batten for the profiling sheet can be increased to 100 cm

Note! Bearing corrugated, which has a high rigidity, with a wave height of over 80 mm is mounted on the crate with a step up to 300-400 cm, if the slope of the roof slope exceeds 8 degrees.

Installation rules

To understand what kind of crate will be required for mounting a professional sheet, you need to decide on the type of material. Bearing and universal marks with wave heights from 35 mm, made on the basis of galvanized steel sheet with a thickness of 0.6-0.7 mm, are laid on the base with a step width of 1-1.5 m. In this case, the carrying capacity of such a roof will be 600 kg, so that it can be easily maintained. Cheaper wall sheeting with a wave height of less than 21 mm requires the construction of a more reliable solid base, since the sheets of roofing material do not have sufficient strength not to deform under the weight of snow. Lathing for corrugated flooring is organized in accordance with the following recommendations:

• The lathing is attached to the counterbathing rails, which are installed along the rafters and fix the waterproofing material.
• The best fasteners for wooden construction are nails, and for metal - screws.
• The installation of the lathing for corrugated flooring always starts from the bottom up. The first board that is attached along the eaves of the roof is called the main one. It is made of bars with greater thickness.
• The battens should be strictly horizontally. To avoid "distortions", experienced craftsmen at the required height tighten the tracing cord.
• Each batten rail is fastened to the rafter leg with two nails or self-tapping screws to prevent turning the bar under intense loads.

Skilled craftsmen note that if the length of the roof is greater than the maximum length of the existing metal profile or rail, you can make a crate of composite elements. However, in this case it is forbidden to connect the slats of the adjacent rows on one truss leg.

Video instruction