Koster KSK SY 15 - Bitumen Post Applied Sheet Membrane

Horizontal waterproofing.

Guidance for specification option:

• On top of the fillet, an approximately 30 cm wide strip is applied as corner reinforcement.
• Apply the vertical and horizontal layers on top of the strip.
• Roll out membranes or pre-cut pieces in a length of approx.
• 50 – 80 cm, remove approx. 30 – 50 cm of the backing paper at the beginning of the membrane and press the exposed adhesive layer onto the substrate beginning from the middle.
• Avoid trapping air and creating creases.
• Pull the backing paper through from under the roll and pull it off while unrolling the membrane.
• Firmly press the applied membranes onto the substrate.
• Use the KÖSTER Leister Hand Pressure Roller (40 mm) on the overlaps and edge areas.
• Overlap the membranes a minimum of 5 cm, national and local guidelines may vary.
• Connections to metal are achieved using a strip of KÖSTER Fix-Tape 10 ALU.
• Connections to vertical interior walls are made with KÖSTER Butyl Fix-Tape Fleece to act as a plaster base.
• All inside corners are to receive a fillet.
• Cover roofs after waterproofing with a geotextile and cover with a screed or round gravel 16 / 32, 5 cm thick.

Vertical waterproofing.

Guidance for specification option:

• All interior and exterior corners are reinforced by applying pre-cut membrane pieces approximately 30 cm wide.
• Remove the backing paper just before applying the membrane to the surface.
• For waterproofing of the especially demanding internal and external corners use specially cut pieces of membrane.
• Refer to the KÖSTER KSK application guidelines on the packaging for details.
• Waterproof wall surfaces beginning approx. 30 cm above ground level, proceeding downwards to the wall floor junction and on to the side of the foundation.
• Pre-cut the membrane to the required length.
• Apply the membrane by removing the protective paper and pressing the membrane onto the substrate.
• Overlap the edge of the previously applied membrane by a minimum of 5 cm.
• All overlapping areas of the membranes must be firmly pressed together using a KÖSTER Leister Hand Pressure Roller (40 mm).
• Remove the backing paper from the self-adhesive edge before applying the next membrane.
• In order to avoid water infiltration behind the membrane, seal all exposed edges of the waterproofing layers as well as around pipe penetrations and other junctions and endings with KÖSTER KBE Liquid Film.
• Mechanically fix the upper ends of the membranes with large headed zinc coated nails, (5 pieces / m), or with a fixing profile.
• In case of rough substrates or porous concrete, a second coat may be needed after the first coat has fully dried.
• Embed KÖSTER Glass Fiber Mesh into the KÖSTER KBE Liquid Film around pipe penetrations.
• Protect the KÖSTER KSK SY 15 with KÖSTER Protection and Drainage Sheet 3-400 against damage due to backfilling.
• A layer of XPS Insulation (minimum 30 mm) also provides protection against backfill.
• The construction pit should be backfilled immediately after full cure of the KÖSTER KBE Liquid Film.
• Horizontal areas must be covered within two weeks of their application.

Manufacturer's standard.

Guidance for specification option:

• Store rolls standing upright.
• Do not place pallets on top of each other Protect from pressure and moisture.
• Do not remove the roll from its package until the moment of application.
• Do not expose rolls to low temperatures or direct sunlight.
• Avoid keeping the product outside for long periods when the external temperature is higher than +28°C.
• Do not leave the roll outside overnight.
• If possible use the entire product which has been removed from its original packaging in the same day.
• Do not apply on dirty, wet, dusty or humid surfaces
• Do not apply when the weather is cold or humid and/or when the substrate is humid (the temperature of the areas in which the various materials are in contact should be at least + 10°C).

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