WPM 188 (Shelterbit Garden Tanking Membrane) 3.0mm SBS bitumen membrane
Positive vapour barrier Excellent resistance to pollutants and aging Good
elongation and flexibility For waterproofing planter boxes, garden beds, roof
gardens and flower beds Contains root inhibitor - stops roots from plants
damaging the membrane High flexibility during application at sub zero
temperatures with no physical strain
WPM 188 is an S.B.S. (Styrene Butadine Styrene) torch applied modified bitumen
waterproofing membrane, consisting of a specially formulated bituminous
compound of distilled asphalt modified with selected high grade visco-elastic
polymers and reinforced with a high quality combined reinforcement (fibreglass
and polyester) and treated with preventive chemicals to stop roots from plants
damaging the membrane. The exceptional elongation properties of SBS combined
with the strength and dimensional stability of the reinforcing, provides an
excellent waterproofing membrane for new and existing constructions. ARDEX WPM
188 is coated with either a sanded or talc top surface finish, while the bottom
surface is embossed and protected by a heat sensitive polythene film. This type
of finish for the lower surface has been chosen for two specific purposes. 1.
To act as a temperature gauge during application. When the film melts it shows
that the compound is at the correct temperature. 2. The embossing is to allow
the gases to rapidly escape when heated to its correct installation temperature
avoiding possible problems of bubbling and blistering.
resistance to pollutants and aging.
flexibility during application at sub zero temperature with no physical strain.
shape stability at high temperatures.
resistance to perforation.
root growth ingress into both the membrane and the laps.
elongation and flexibility.
welded laps provide an homogenous joint.
WPM 188 has been especially formulated for the waterproofing of:
covered civil works etc.
WPM 188 is used as a single layer or multi layer tanking membrane in horizontal
or vertical applications, also for waterproofing balconies, terraces and flat
application of ARDEX WPM 188 should be carried out by an accredited applicator.
Installation shall be strictly in accordance with the manufacturer’s
recommendations. All surfaces to which the ARDEX Shelterbit systems are
installed must be properly prepared prior to installation. All surfaces must be
clean, dry, smooth, and free of sharp edges, fines, loose or foreign materials,
oil, grease and other materials which may damage the membrane. New concrete
must be cured a minimum of 28 days prior to the installation.
WPM 188 Apply to all surfaces one coat of ARDEX WPM 240 Bituminous Primer at a
coverage rate of 5 square metres per litre and allow to dry thoroughly. A layer
of ARDEX WPM 188 shall be installed over all positive side surfaces by LPG
torch application techniques by an ARDEX accredited applicator. The ARDEX WPM
188 must be fully bonded to the prepared substrate with side laps of 7.5cm and
end laps of 10cm. The membrane must be detailed in accordance with ARDEX
recommendations. Overlaps shall be sealed by torch. The ARDEX WPM 188 membrane
shall extend to at least 100mm above the backfill level. The top edge of the
membrane shall be finished using an ARDEX Pressure Seal to prevent ingress of
water behind the membrane. After all membranes have been installed they shall
be protected from mechanical damage by placing ARDEX Protection Board against
the membrane before backfilling. The board shall be fixed using PVC Duct Tape –
do not use mechanical fixing that will puncture or penetrate the membrane.
WPM 188 is hazardous; non-dangerous goods. However during installation,
exercise caution when working with open flame. Examine all surfaces to which
the flame has been applied for smouldering or burning conditions. Do not use
open flame on or near highly combustible materials. Follow all local fire
rolls of ARDEX WPM 188 should be stored in a covered area protected against
sunlight and UV radiation. Rolls should be stored in a vertical position on a
smooth floor so as not to damage the edges.
size: 1m x 10m
weight: Approximately 35kg
per pallet: 28
Technical Data shown below are the average results of the Tests, Measurements
and Trials, carried out on ARDEX WPM 188 Waterproofing Membrane.
mass: 3.5 kg/m2
stability: 90 oC
flexibility: -20 oC
strength Ultimate longitudinal: 720 N/5cm, Ultimate transverse: 420 N/5cm
at break: Longitudinal 40%, Transverse 45%
resistance: Longitudinal: 130 N, Transverse: 140 N
finishes: Lower torch film, Top torch film
1) Lower surface; the surface which is applied to the structure being
Note 2) Top surface;
exposed to underside of covering membrane