With mineral membrane
CORRUGATED METAL SHEET ROOFING
Waterproofing
with mineral membrane
1- Corrugated metal
sheet substrate
2- Insulation panel,
mechanically fixed to the substrate
3- Double layer
waterproofing system, made of:
a) first layer: NOVAGUM-P 4 mm (3) applied
by torching, in total adhesion;
b) second layer: NOVAGUM-P MINERAL 4,5
Kg/sqm (5), applied by torching in total adherence to the first one and on the
verticals, up to a height of 20 cm above the level of the water.
For double
layer systems, it is always advisable to lay the cap sheet in longitudinal
direction respect to the base sheet, arranging the overlaps by having the ones
of the upper layer in the middle of the first layer sheets. The sheets must be
laid as well in such way that head overlap are staggered in longitudinal
direction by at least 100 cm.The joints must be made by torching, overlapping
the membranes (laid as "tiles", in the direction of the slope, to favour the
down flow of the water), for at least 8 cm in the case of the side and 12 cm for
the head. Vertical walls and other protruding structures must be waterproofed
with the same type of membrane, possibly mineralised.
4- Mechanical
fixing
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