Snow guard system

Snow protection systems (e.g. seam clamps including snow guard pipes and ice stoppers) generally prevent snow and ice from slipping off. Absolute snow protection or avalanche protection is not possible! Snow transport and the formation of cornices cannot be prevented. In the event of a hazard, the removal of the snow masses must be arranged by the homeowners.

In the case of standing seam coverings, the snow guard is secured using seam clamps incl. snow guard pipes and ice stoppers. The required number of the rows of snow guards is to be calculated depending on the property and the location.

The seam clamps are only to be used for their intended purpose (snow guard!).

Note

Provided calculations by PREFA are based on the installation of single pipe clamps on each fold and double pipe clamps on the eave.

Open the screws far enough that the sailer clamps rest on the roof covering (see figure above).
Align the row and then tighten the screws to a torque of 35 Nm. Only the supplied original screws may be used for attachment.
PREFA seam clamps can also be placed in the clip area. This does not affect the longitudinal and transverse expansion of the panels.
The seam clamps must be mounted at right angles to the roof surface.
In order to prevent the pipes from being pushed or turning, each pipe must be fixed once in the middle. Join the snow guard pipes with provided sleeves. The pipe expansion is ensured by the foam elements in the connecting sleeve. The overhang in the edge area may not exceed 30 cm.
Seam clamps with two snow guard pipes are to be used in the eaves area, while single pipe seam clamps would be sufficient for the main roof area 2 ice stoppers per tray must also be attached to the lower snow guard pipe in the eaves area. Ice stoppers are attached to the snow guard pipes. To avoid the pipes from twisting, two ice stoppers should be installed contrary to each other.
PREFA double pipe seam clamps must be positioned in such a manner that the lower of the two pull-through pipes is arranged on the eaves side (see figure below).
PREFA seam clamps with an elongated hole can be used up to an eaves pitch of 45°.

Single pipe and double pipe seam clamps