8/12/2019 Bituplus P
2/2
Unroll the roll ofBITUPLUSPmembraneand align the side laps.
Re-roll the roll halfway and stand on theunrolled portion to
prevent shifting. Side overlaps should be a minimum of 100 mm and
the end overlaps150mm.BITUPLUSP membranes are installed by using a
cylinder fed propane gas torch. Use of hand-held roofingtorches is
recommended as it affords a good control. I f multiple burner
torching machines areutilized, care must be taken to ensure the
application of uniform heat and avoid overheating of the
membrane.Begin torching the embossed polyethylene side of the
rolled portion of the membrane. Proper torchingprocedure involves
passing the torch flame in an L pattern applying about 75 percent
of the heat acrossthe coiled portion of the roll and 25 percent
across the substrate, including the lap area of the
previouslyinstalled membrane.As the membrane is heated the
embossing starts to melt away exposing a shiny bitumensurface. Roll
forward the membrane and press firmly with the boot or roller
against the substrate to bondwell. The propane flame should be
moved from side to side and up the lap edge while the membrane
isslowly unrolled and adhered to the underlying surface. Subsequent
shift of the roll shall be avoided afterheating has begun. When
complete, the remaining un-torched membrane shall be re-rolled and
installed inthe same manner. When one end is complete, re-roll the
opposite end not yet torched, and install in thesame manner.
As subsequent rolls are installed, heat is applied to both the
roll and the exposed laps of the membranebeing overlapped onto. Be
sure to heat the entire roll evenly, not just the lap areas, with
extra concentrationat the laps. Care shall be taken not to over
torch the membrane as this will expose and damage
thereinforcement.
Sealing
Heat both the overlaps and use round tipped trowel to seal the
overlap. Adequate heat is confirmed when auniform flow of melted
bitumen compound flows evenly in a bead that oozes from the applied
membranesedges. Excess compound should be smoothed and pressed into
the seam using a heated trowel.Any un-bonded areas must be lifted
and re-torched. Do not attempt to reseal by torching the top
surface of themembrane.
Application-Vertical Area:
Provide a 200 mm wide reinforcing strip ofBITUPLUSPover the
cement sand angle fillet.A mineral surfaced flashing sheet membrane
shall be lapped with the base membrane and taken up on theparapet
wall and tucked into a groove cut into the concrete. The grooves
will be sealed with a suitablemastic sealant followed by fixing of
the wooden batten.Water flood test is to be carried out for a
minimum of 48 hours.
The applied waterproofing membrane shall then be protected with
insulation boards (Extruded/expandedpolystyrene) followed by the
separation layer (Geo-textile membrane). The top surface is either
finished withcement sand tiles or gravels.
Membrane around Pipes:
A cement sand fillet (50mm x 50mm) is to be provided all around
the pipe. A 400 mm wide reinforcing stripwill be laid after
applying the primer. The joint of the membrane with the pipe will
be sealed with Bitumenrubber mastic.
MEMBRANE REPAIR
There is every chance of the membrane getting punctured due to
the ongoing site activities. The damaged areashould be patched with
a piece of the same membrane which extends at least 100mm from all
the sides of thepuncture. The area to be repaired shall be primed
with the bitumen primer and allowed to dry before carryingout the
patching works.
Henkel Polybit Industries LimitedP.O. Box 293 | Umm Al Quwain |
UAE |
Tel: +971 6 7670777 | Fax: +971 6 7670197 |
[email protected]
