icopal Monarplan Series Installation Manual page 18

6.3.1 Butt joints of unbacked membranes
Unbacked membranes are laid, analogue to the longitudinal edge,
with an overlap of at least 5 cm at the end of the membrane.
The top corner of the membrane must be rounded off!
Before welding the T-joint, the respective inner (middle) membrane
end must be chamfered over the whole lap width (min. 4 cm)! This
can be done with the hot nozzle of a hand-held welder, if necessary,
with a metal plate serving as an underlay.
Note: Be aware that the temperature of the hot air welder is not too
high and overheat/burning the membrane!
6.3.2 Butt joints of backed membranes
Backed membranes (Monarplan® GF), at the end of the membrane,
are butt-jointed or, if appropriate, tacked with hot air with an
overlap of approx. 1 cm (advantageous at low temperatures) and
covered with an unbacked tape (15 cm tape width for mechanically
fastened waterproofing membranes, e. g. if fasteners are placed
at the butt joint) of at least 15 cm width.
The length of the tape: membrane width + approx. 5 cm.
At one end of the tape, both corners have to be rounded off.
Place the tape at the centre of the joint with the rounded-off end
extending approx. 5 cm onto the previously laid membrane, which
is through at the joint. The other side of the strip should end level
Monarplan
min. 5 cm
min. 5 cm
min. 5 cm
® Installation manual
round off
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