Crack the roof do it yourself

One of the most important components of the roof truss system is lathing. It is intended for placing and fixing on it various roofing materials. In addition, an important function is the creation of the necessary ventilation gap between the roof covering and the layer of insulation to prevent the formation and accumulation of condensate. Proper installation of the batten is an important element that ensures high strength and durability of the roof of the house. If you have time, desire and certain skills, assembled roof lathing with your own hands will reduce the cost of making the roof. Let us consider more details of its manufacture.

Selection and processing of materials

As a material for the manufacture of crates, dry wood should be selected that does not have knots and other defects that can cause cracking and breakage of the bars. In some cases, special roofing plywood can also be used for the batten. To protect the wooden elements of the roof from various parasites and exposure to fire, they must be treated with antiseptics and special fire-fighting compounds. Better impregnation can be achieved by performing work with a paint brush, with alternate application of two layers of the composition.

Types of crates

Depending on the roofing materials used, several types of lathing can be used.

Solid.It is used when mounting the sprayed roof, soft roofing materials, shingles and roll materials. When it is made on top of the first draft layer, perpendicular to it, the boards or bars are packed tightly (with a gap of up to one centimeter). In a simplified version, the crate may consist of a single layer that is packed perpendicular to the rafters.

Permitted. It is recommended when using sheet roofing materials with sufficient area. Slate, ondulin, metal tile and other materials can be used as these materials. The cross section of the timber for the manufacture of the batten is selected based on the weight of the roofing material and the design loads from the winter snow cover. In any case, the cross section of the bar should be? 5 cm. The step of stuffing bars should correspond to the selected roofing material.

Crate for some types of roofing materials

For different types of used roofing has its own characteristics of crates.

Under the soft roof

It is made in the form of two layers of solid wood flooring. The crate should be:

• durable to withstand the weight of the installer, roofing material and precipitation;
• as reliable as possible;
• even (with the absence of kinks and angles to prevent bending and friction of the roofing material).

As material, it is recommended to use calibrated planed boards, roofing plywood or grooved boards, which allows to obtain a very flat surface.

Under roll materials

It is made in the form of double or solid crates that can withstand the weight of a standing person without deflection. The thickness of the used bars or boards should not be? 25 mm, and the width should not exceed 150 mm (to prevent their deformation).

In the manufacture of solid crates, the presence of cracks, protruding nail heads, knobs, and other irregularities is not allowed.

Under the metal tile

It is made in the form of a trellised frame, made of cut bars with an edge equal to 6 cm. The step of mounting the bars depends on the type of metal tile used (the main parameter is a profile) and the angle of slope of the roof slopes.

Due to the high requirements for the strength characteristics of the batten, quality bars should be used, calibrated to the same size (or sorted).

Under the undulation

Depending on the angle of slope of the roof slopes, several variants of its manufacture are used:

• Angle is not more than 10 °. The crate is made in the form of a continuous flooring of special moisture resistant plywood or boards.
• Angle from 10 to 15 °. The crate is assembled from 40x50 mm bars parallel to the eaves with a pitch of 45 mm.
• Angle over 15 °. The crate is made of 40x50 mm bars with a pitch of 60 mm.

For the convenience of the specified interval between the bars, it is recommended to use a special wooden template.

Performance of waterproofing

When installing the batten, waterproofing should be performed using a special film mounted with an overlap of 15 cm. Sequentially installing the film from the eaves to the ridge, it is necessary to provide ventilation gaps that should be placed between the roofing material and the film, and between the insulation and the film.

Correctly mounted lathing with quality materials will ensure reliable fastening of the roof covering and, accordingly, its long service life to protect your home from the vagaries of nature.

Video

Step-by-step instructions for preparing the roof for the installation of metal: