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☛ Tender text for root protection membrane "WSB 100-PO"
☛ Tender text for leading up WSB 100-PO
Separation and sliding layers, applied as loosely laid tarpaulins or membranes, protect the roof waterproofing from tensile and shear forces. In the case of chemically incompatible materials (e.g. simple soft PVC membranes on bitumen), a neutral separation layer must be provided. In the case of inverted roofs, no foils (vapour-barrier!), but only vapour-permeable fleeces (e.g. TGV 21) may be used as a separating layer on the insulation boards in order to avoid condensation within the thermal insulation.
Root protection films, applied as loosely laid tarpaulins or as welded sheets, protect the roof waterproofing from penetrating plant roots. This is especially necessary for bituminous waterproofing. The WSB 100-PO root protection membrane, which can be welded with hot air, is advantageous for complicated roof surfaces with many projections, penetrations, etc. and for intensive greening. The WSF 40, large-format tarpaulins made of special PE, laid with an overlap of at least 1.5 m, are suitable for simple roof surfaces that are to be extensively greened. In general, when using root protection layers on existing waterproofing, attention must be paid to the material compatibility of the materials. The ZinCo root protection film WSF 40 and the root protection membrane WSB 100-PO are bitumen-compatible!
Technical Information
Installation Instructions
This installation instructions describe the essential steps of using this product. In addition, please observe the relevant standards and guidelines, in particular the provisions of occupational health and safety.
If there is a risk of storms, the installation should not take place.
1) General:
The WSB 100-PO root protection membrane is a flexible, thermoplastic polyolefin membrane with an integrated reinforcement made of polyester fabric. The web is homogeneously welded with hot air in the overlapping process or homogeneously with automatic machines.
Due to the changing boundary conditions such as air temperature, humidity, wind movement, etc., each sheet should be given 30 minutes to relax before welding. For the same reasons, test welds and peeling tests must be carried out before the actual welding work begins, after work interruptions and in the event of changing weather conditions.
2) Installation:
The WSB 100-PO root protection membrane is laid over the entire surface of the roof surface on non-root-resistant roof waterproofing.
The non-reinforced, stretchable connecting membrane is suitable for rising components, which is fixed at the upper end with the AP 60 clamping profile or the AP 150 clamping and protective profile. It may make sense for the roofer to already install the siding. The prefabricated corners are to be used as both interior and exterior corners.
The seam overlap is approx. 75 mm, whereby the seams must be at least 38 mm wide for automatic welding machines and at least 50 mm wide for manual welding machines.
3) Cutting:
The WSB 100-PO root protection membrane can be cut with a cutter knife (with a hard blade) or sturdy universal scissors. When cutting, care must be taken to ensure that the roof waterproofing is not damaged under any circumstances! If damage does occur, it must be reported and repaired immediately. The root protection membrane must be cut out in a circle over roof drains, about 1 cm larger than the roof drain all around (cross cut is not enough!). To protect the edges of on-site cut webs, they should be used as a bottom panel if possible.
The seam surfaces must be free of any dirt, as these can hinder homogeneous welding. If the seams are heavily soiled, they should be cleaned carefully with a clean cotton cloth soaked in acetone or xylene.
Caution: The seam connection of the test weld can only be tested for strength after the seam has cooled down sufficiently. In any case, a flawless weld seam separates from the fabric when it is peeled off.
4) Substrate:
The substrate must be flat, closed, free of burrs and protrusions, and pressure-resistant to enable the contact pressure required for welding. A protective layer of heat-resistant geotextile with at least 300 g/m² (e.g. ZinCo Separation and Protective Mat TSM 32) below the root protection membrane is recommended.
5) Welding of the lap seam with automatic machines:
Only welding machines may be used in which the temperature and running speed can be individually controlled and the required contact pressure is available. At ambient temperatures of -5 °C to 30 °C, the welding temperature to be set is 560 °C to 620 °C with a running speed of between 2.4 and 3.7 m/min and an air flow rate of 80–100%.
The setting must be adapted to the boundary conditions and checked by a test weld and a peel test (see point 1).
6) Welding of the lap seam with hand-held devices:
Only welding machines may be used where the temperature can be individually controlled. A 40 mm wide, heat-resistant plastic roller must be used for pressing.
7) Welding is to be carried out in three phases:
a. Attachment to fix the web.
b. Weld web edge bottom layer (prevents hot air from escaping inside).
c. Sealing welding up to the edge of the track upper layer.
Tool recommendation: Slitter rewinder
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