How to carry out the installation of snow retainers correctly

Snow retainers are crucial parts that guarantee a roof’s integrity and safety in the winter. They keep ice and snow from sliding off suddenly, which could endanger those below and cause property damage. In addition to improving roof safety, properly installed snow retainers increase the longevity of roofing materials.

Selecting the appropriate snow retainer type for your roof is the first step towards a proper installation. There are numerous designs that are appropriate for different roof types and pitches, including pad-style and bar-style retainers. To guarantee efficient snow retention, the choice should take local weather patterns, roof material, and slope into account.

It’s imperative to completely clean the roof surface where the snow retainers will be installed before installation. To create a clear and safe attachment surface, all ice, dirt, and debris must be removed. By ensuring a secure fit, this preparation lowers the possibility of the retainers coming loose over time.

It’s important to place the snow retainers strategically. The best places to put them are above eaves and valleys where snow tends to collect and slide. They should be spaced evenly throughout the roof. In order to minimize the risk of structural damage, proper spacing between retainers ensures uniform snow distribution and prevents overloaded sections of the roof.

Determination of the design of the roof

Snow holders can be arranged in multiple rows or in a checkerboard design. The barriers can range in height from 5 to 25 centimeters.

To make the best choice, you must ascertain:

• Roof sloping angle;
• the length of the slope from the ridge to the cornice;
• the average value of the mass of snow per 1 m 2, characteristic of the area;
• Roofing material.

Examine the effects these parameters have on the snow retention system requirements. We will figure out how to determine their value along the way.

Tilt of the roof. Snow slides off of horizontal, flat roofs. Snow flies off vertical surfaces instantly, with no time for accumulation. The range of roofing angles (6 to 55 degrees) where installation is required.

We learn the roof’s slope from the project documentation. Any available tool can be used to measure the angle.

The roof’s vertical length. The length of the roof determines how much pressure snow has on snow holders. Without a cornice, we ascertain it through design documentation. Measure the roulette in the event that there are no drawings.

Snow’s weight. The amount of snow that is typical for the house’s location will be found in the SNiP 2.01.07–85 construction standards and regulations. The data from ongoing meteorological observations are shown in "Snow loads," section 5. They must be used when designing. Eight categories of areas with varying loads are indicated on the map. The map regularly updates to reflect changes in the climate.

Our area’s category tells us how much snowfall is required on a square meter of horizontal surface in order to calculate the load.

Because of the abundance of snow, independent installation is not advised for Kamchatka and Sakhalin (VII and VIII category). When tilting a roof from 6 to 55 degrees, installation is necessary in areas classified as III through VI.

Referenced in section "D Wedding from the roof and snow retention" of joint venture SNiP II-26-76 17.13330.2016. Due to its complexity, the formula needs more details. The North European standard S is used for the roof of your own house. S. 831335. There is no requirement to perform the calculation. Knowing the angle of the roof slope and the district snow load is all that is needed to select the value of the maximum allowable distance between the rows from the table below.

Select a line on the graph that represents the amount of snowfall in the area. The greatest distance between the barriers along the axis y will be indicated by the line’s point of coincidence with the roof slope’s angle values (axis x).

The number of rows on the roof slope can be calculated by dividing the length of the slope (without a cornice) at the distance obtained, rounding the result in a larger direction to the whole.

Choosing the type of snow retainers

The weight of the snow, the kind of roofing material, and the amount of money available will all be important considerations when selecting barriers.

Note right away that we are discussing snow retention and that any device without a detention function will not be taken into consideration. This also applies to snow-gathering prevention devices, which lessen the risk but do not completely eradicate it.

The following types of snow holders are produced with the barrier principle of work:

• Lattice. Metal grille 5-20 cm is vertically attached to the brackets.

The barrier completely prevents snow layers from penetrating. assumes as much of the snow load as feasible. By adding more brackets and pipes, the structure can be strengthened. It’s a good thing that the grate’s design can embellish the outside. Because of the frequent use, lattice barriers are less expensive than tubular barriers.However, lattice barriers perform worse than tubular barriers.

• Tubular. 2-3 pipes with a diameter of 1.5–3.0 cm are attached to metal brackets at a height of 15 cm above the roof. The correctly installed barrier completely stops moving snow layers along the roof. There are configurations of brackets for different roofing materials. The strength is high.

Any type of climate and slope angle can use these kinds of snow retainers. In comparison to lattice barriers, the cost is less. The design allows snow to melt more quickly. Conventional designs can support loads exceeding 180 kg/m 2 when the roof is tilted 30 degrees. The strength of the structure increases with the pipe’s proximity to the roof and the spacing between the brackets.

• Corner. For regions with small winter precipitation and roofs with a slope of less than 30 degrees, corner elements 4-6 cm high are used.

These kinds of snow holders are also known as threshold or plate holders. They lengthen the snow’s duration on the roof until it melts completely by obstructing its sliding layer. Generally speaking, barrier material is comparable to roofing. High strength is not any different.

• Pointed. Used on slopes with a slope up to 20 degrees. In areas where the snow cover can lie for more than half a month, the use is contraindicated. Spot structures are installed on a soft roof in low -snow areas. Roof tilt should not exceed 15 degrees. Create additional interference to sliding snow.

More robust structures can be added to point barriers. The components are arranged in rows with a 0.5–0.7 m gap between them in a checkerboard pattern. It is necessary to cover the mounting locations with roofing material.

Calculation of needs

With the exception of points, barrier structures are erected in continuous rows and have three-meter sections. By dividing the horizontal length of the roof slopes by the section size and multiplying by the number of rows of barriers, we can determine the number of sections. Snow retainers are positioned in additional lines above the attic windows.

Sometimes, in an effort to save money, snow retention barriers are only installed above areas where there is heavy pedestrian traffic. Remember that kids can walk from any side of the house in the winter and that snow is dispersed in a meter-long fall.

The necessary procedures to firmly fasten snow retainers to your roof are outlined in our guide on "How to install snow retainers correctly." In order to stop unexpected snow slides that could destroy property and put people below in danger, snow retainers are essential. We’ll go over selecting the best kind of snow retainer for your roof, where to put it, and how to install it step-by-step. This article will assist you in comprehending and carrying out the installation of snow retainers efficiently, guaranteeing safety and peace of mind throughout the winter months, whether you’re new to this or looking to improve your current setup.

General installation rules

When designing and installing the snow retention system, a few fundamental guidelines need to be followed for roofs with any slope angle. This will shield the roof from deterioration in addition to preventing the potentially hazardous accumulation of snow masses:

1. If the roofing material has not yet been laid, we recommend strengthening the crate in the places of fasteners and immediately in front of the snow holders barriers.
2. The lower row of brackets is attached over the bearing wall of the building.
3. The brackets are attached to the horizontal wooden elements of the crate, and not to the material of the roof.
4. Should not be attached with screws with brackets. Bolt M8 × 60 with a hexagonal head is optimal for use. A heat -resistant rubber washer is laid under the bolt.
5. The places of fastening along the wavy roof are on the upper crests.
6. From the edge of the barrier section to fastening should be less than 0.1 m.

The installation of snow retainers commences with the installation of the extreme brackets, followed by the uniform installation of the intermediate brackets throughout the section. Sections of the barrier are installed without any spaces between them.

Correct installation of snow retainers is essential to preserving the longevity and safety of your roof in the winter. These little gadgets are essential in preventing unexpected snow slides, which can endanger people and property below.

It’s crucial to take the pitch and material of the roof into account when installing snow retainers. To effectively hold snow in place without causing damage to the roof surface, different types of snow guards are needed for different types of roofs.

The efficiency of snow retainers depends on their proper spacing. If they are positioned too far apart, the snow will be distributed unevenly, which could result in concentrated loads that are too heavy for the guards to handle. On the other hand, putting them too close might result in an inefficient load distribution.

When installing snow retainers, always adhere to local building codes and manufacturer instructions. By following these instructions, you can be sure that the retainers are firmly put and strong enough to endure the typical snowfall in your region.

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