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• Snow guard
• Pipe-style snow guard system
• XL pipe-style snow guard system
• Ice-retention bracket for pipe-style snow guard system and XL pipe-style snow guard system
• Mountain snow guard

Snow guards are to be arranged according to the calculated installation pattern over the entire roof surface in each uncut row. (Except in the area of accessories and built-in parts.) Where necessary, additional snow rakes are to be provided in exposed locations. Structural installations such as dormers, chimneys, etc. are to be taken into account according to the standards.

As an additional measure, a snow rake or pipe-style snow guard system can be installed above house entrances and publicly accessible areas. In the area of dormers, chimneys, solar panels, roof hatches, skylights, ventilation pipes, awnings, etc., it may be appropriate, depending on the situation, to attach additional snow retention devices (increased number of snow guards or snow rakes). Install snow guards according to the calculated installation patterns, depending on the roof pitch and snow load. Fasten each guard with at least 2 grooved nails. Only use original snow guards.

From a roof pitch of 45°, a combination of snow guard and snow retention systems must be implemented (= pipe-style snow guard system on the eaves).

The snow guards are installed according to the following installation patterns, depending on the snow load and roof pitch. The applicable installation patterns are shown in the tables listed below. Observe the information on the roof pitch in the vertical direction and the snow load on the ground (sk) in the horizontal direction. The snow loads (sk) to be considered for the respective construction project must be taken from the national standards and regulations.

Requirements

• The installation instructions for the snow guards must be followed.
• Roof structures with h > 1.0 m require a separate certificate.
• Snow overhang is not taken into account!
• Form coefficient for snow load with μ=0.80.

Snow guards are respectively pushed up into the central plate punching and fastened with at least 2 grooved nails. The number of clips in panels is not influenced by the use of snow guards.

With roof tiles, 2, 4 or 8 snow guards are installed per m² (see table below - Installation patterns DP1, DP2 and DP3). The first two rows must be equipped with snow guards throughout.

Snow guards are respectively pushed up into the left of the two central plate punchings and fastened with at least 2 grooved nails. The number of clips in the shingles is not affected by the use of snow guards.

With roof shingles, 2.5, 5 or 10 snow guards are installed per m² (see table below - Installation patterns DS1, DS2 and DS3). The first two rows must be equipped with snow guards throughout.

Snow guards are respectively pushed up into the left of the two DS.19 shingle central plate punchings (marked “ST”) and fastened with at least 2 grooved nails. With a DS.19, the number of clips is not influenced by the use of snow guards.

With DS.19 shingles, 2, 4 or 8 snow guards are installed per m² (see table below - Installation patterns DS.19 1, DS.19 2 and DS.19 3). The first two rows must be equipped with snow guards throughout.

Snow guards are respectively pushed up into the centre of the punching in the rhomboid roof tiles 29 × 29 and fastened with at least 2 grooved nails. If a snow guard is mounted, no additional clip attachment is required on this rhomboid roof tile 29 × 29.

With rhomboid roof tiles 29 × 29, 3, 6 or 12 snow guards are installed per m² (see table below - Installation patterns DR1, DR2 and DR3). The first two rows must be equipped with snow guards throughout.

Snow guards are respectively pushed up into the centre of the punching in the rhomboid roof tiles 44 × 44 and fastened with at least 2 grooved nails. The number of fastenings in the rhomboid roof tiles 44 × 44 is not affected by the use of snow guards. With rhomboid roof tiles 44 × 44, 1.3, 2.6 or 5.2 snow guards are installed per m² (see table below - Installation patterns DR44 1, DR44 2 and DR44 3). The first two rows (starting plates for rhomboid roof tiles 44 × 44 and the first row of rhomboid roof tiles 44 × 44) must be equipped with snow guards throughout.

Snow guards are pushed up on the curved embossing on the fold and fastened with at least 2 grooved nails. The number of fastenings in the R.16 roof tiles is not influenced by the use of snow guards.

With R.16 roof tiles, 1.7, 3.4 or 6.8 snow guards are installed per m² (see table below - Installation patterns R.16 1, R.16 2 and R.16 3). The first two rows must be equipped with snow guards throughout.

Snow guards are pushed up on the curved embossing on the fold and fastened with at least 2 grooved nails. The number of fastenings in the FX.12 roof panels is not affected by the use of snow guards.

With FX.12 roof panels, 1.7, 3.4 or 6.8 snow guards are installed per m² (see table below - Installation patterns FX.12 1, FX.12 2 and FX.12 3). The first two rows must be equipped with snow guards throughout.

In principle, the FX.12 roof panels are laid at irregular intervals with an offset of the vertical angle fold of at least 220 mm. Due to any offset of the FX.12 roof panels, no symmetrical installation pattern is possible. If the use of snow guards is planned for FX.12, it is recommended to lay the FX.12 roof panels with a regular offset. This impairs the irregular appearance that can usually be achieved with FX.12 roof panels, however, a regular installation patterns is only possible with snow guards (Fig. 1 and 2).

The snow rake brackets are installed with two foot parts on the roof membrane. The insert profiles are inserted into the snow rake hook and fastened with a fixing slider. The insert profiles are then connected to each other using sockets - Total height with foot parts: 219 mm.

The snow rake system can also be retrofitted.

Depending on the object and location, it may be necessary to mount several rows of snow rakes. The maximum permissible distances are to be calculated depending on the snow load, the roof pitch and the rafter distance.

Mark the centre of the rafter. The upper foot part (outer edge) should have a distance of at least 10 mm to the overlying fold. Observe a distance of both foot parts of 145 mm (measured on the inside) (Fig. 1).

For attachment to the rafter, the drill holes (∅ 8.5 mm) must lie on the axis of the snow rake hook (course of the rafter) - Fixing screws in one axis with the rafter. Remove rear protective film on the foot parts, position and stick on (Fig. 2).

• Pre-drill the screw holes in the sub-structure framework with a drill (∅ 4.1 mm), drilling depth: approx. 50 mm (Fig. 3).
• Fasten the foot parts with 2 fastening screws, each 8 × 220 mm (with double-shell construction) or 8 × 120 mm (with single-shell construction), on the rafter until the surface seal is pressed onto the roof covering or sub-structure framework. When processed correctly, the surface seal bulges slightly outwards (attachment for drill: Torx TX40) (Fig. 4).
• Attaching (placing) the cover caps to the foot parts (Fig. 5).

• Mounting of the snow rake hooks with both hexagon head screws (M12) to the foot parts (SW 19; torque: 35 Nm) for roof tiles (Fig. 6A), shingles (Fig. 6B), rhomboid roof tiles (Fig. 6C), R.16 and FX.12 (Fig. 6D).

• Insert profiles according to recesses in the mounted hooks. The overhang in the edge area may not exceed 30 cm (Fig. 7).
• After installing the 3 insert profiles, push the locking profile onto the hook from above (pre-drilled hole at the bottom) (Fig. 8).

• Fasten each insert profile once in the centre of the profile length with the supplied 5.5 × 25 mm TX25 self-tapping screws (1 pc. per insert profile) to prevent lateral shifting of the bars and to ensure profile expansion to the left and right (Fig. 9 and 10).

• Connect insert profiles in the joint area with the connecting sleeves supplied. The connecting elements have a foam element in order to be able to absorb linear expansion caused by heat (Fig. 11).

• Push the junction of the pipe-style snow guard system onto the insert profile (Fig. 1).
• Fasten the junction with the supplied fastening screw (Fig. 2).
• Fully assembled junction for the pipe-style snow guard system (Fig. 3).

The XL snow rake brackets are installed with two foot parts in the rafter on the roof membrane. The insert profiles are inserted into the XL snow rake bracket and fastened with a fixing slider. The insert profiles are then connected to each other using sleeves – total height 360 mm.

The XL pipe-style snow guard system can also be retrofitted.

Depending on the object and location, it may be necessary to mount several rows of snow rakes. The maximum permissible distances are to be calculated depending on the snow load, the roof pitch and the rafter distance.

• Mark the centre of the rafter. The upper foot part (outer edge) should have a distance of at least 10 mm to the overlying fold. Observe distance of 360 mm (measured on the inside) between the two foot parts.
• For attachment to the rafter, the drill holes (Ø 8.5 mm) must lie on the axis of the XL snow rake bracket (course of the rafter) - fixing screws in one axis with the rafter. Remove rear protective film on the foot parts, position and stick on (Fig. 1 and 2).

• Pre-drill the screw holes in the sub-structure framework with a drill (ø 4.1 mm), drilling depth: approx. 50 mm (Fig. 3).
• Fasten the foot parts with 2 fastening screws, each 8 × 220 mm (with double-shell construction) or 8 × 120 mm (with single-shell construction), in the rafter until the surface seal is pressed onto the roof covering or sub-structure framework. When processed correctly, the surface seal bulges slightly outwards (attachment for drill: TX40) (Fig. 4).
• Attaching (placing) the cover caps to the foot parts (Fig. 5).
• Mounting of the XL snow rake brackets with both hexagon head screws (M12) to the foot parts (SW19; torque: 35 Nm) (Image 6).

• Insert profiles according to recesses in the mounted XL brackets. The overhang in the edge area may not exceed 30 cm (Fig. 7).
• After installing the 5 insert profiles, push the locking profile onto the hook from above (pre-drilled hole at the bottom) (Fig. 8).

• Fasten each insert profile once in the centre of the profile length with the supplied 5.5 × 25 mm TX25 self-tapping screws (1 pc. per insert profile) to prevent lateral shifting of the bars and to ensure profile expansion to the left and right (Fig. 9).
• Connect insert profiles in the joint area with the connecting sleeves supplied. The connecting sleeves have foam elements in order to be able to absorb linear expansion caused by temperature change (Fig. 10).

• XL pipe-style snow guard system – slide the XL junction onto the insert profiles (Image 1).
• Fasten the XL junction with the supplied fastening screw (Image 2).
• Fully assembled XL junction (Fig. 3).

• Clamp the ice-retention bracket onto the insert profile (approx. 4 pcs. per metre) (Fig. 1).
• Fasten the ice-retention bracket with the supplied fastening screw (Fig. 2).
• Fully assembled ice-retention bracket (Fig. 3).

Installation is carried out with two foot parts on the roof membrane. Round timber with Ø 140 mm can be inserted in the mountain snow guard brackets and fixed using the screws provided. Total height of the supports with foot parts: 219 mm. The mountain snow guard supports can also be retrofitted. Available in all colors for PREFA roof systems (small format).

Depending on the object and location, it may be necessary to mount several rows of mountain snow guards. The maximum permissible distances are to be calculated depending on the snow load, the roof pitch and the rafter distance.

• Mark the centre of the rafter. The upper foot part (outer edge) should have a distance of at least 10 mm to the overlying fold. Observe a distance of both foot parts of 145 mm (measured on the inside) (Fig. 1).
• For attachment to the rafter, the drill holes (Ø 8.5 mm) in the foot parts must lie on the axis of the mountain snow guard supports (= course of the rafter) - Fixing screws in one axis with the rafter. Remove rear protective film on the foot parts, position and stick on (Fig. 2).

• Pre-drill the screw holes in the sub-structure framework with a Ø 4.1 mm drill, drilling depth approx. 50 mm (Fig. 3).
• Screw the foot parts with 2 Fastening screws, each 8 × 220 mm (with double-shell construction) or 8 × 120 mm (with single-shell construction), on the rafter until the surface seal is pressed onto the roof covering/sub-structure framework. When processed correctly, the surface seal bulges slightly outwards (attachment for drill: Torx TX40) (Fig. 4).
• Attaching (placing) the cover caps to the foot parts (Fig. 5).

Mounting of the mountain snow guard bracket with two hexagon head screws (M12) to the foot parts (SW19; torque: 35 Nm) for roof tiles (Fig. 6A), shingles (Fig. 6B), rhomboid roof tiles (Fig. 6C), R.16 and FX.12 (Fig. 6D).

• Insert round timber corresponding to the diameter of the mountain snow guard bracket (Ø approx. 140 mm) and fix with a screw (5 × 60 mm). The overhang in the edge area may not exceed 30 cm (Fig. 7 and 8).