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TREATMENT
WITH WATERPROOF COATING:
The wall waterproofing coating
system to be used shall be
Sealflex Elastomeric Wall
Waterproofing Coating System. It
is a heavy-duty, high build,
elastomeric wall coating system
for external walls and other
vertical substrates. It gives a
strong, durable and elastic
membrane that bridges small
cracks and tolerates some
movement of the substrate. It is
ideally suitable for less sound
substrates such as concrete or
plaster that contains hairline
cracks or that is subjected to
movement within itself. The
system shall consist of a
suitable primer, a 100 % acrylic
elastomeric bodycoat and a
topcoat, and the total dry film
thickness shall be approximately
320 microns. The system shall
pass the 3.0mm Mandrel, with
elongation of more than 300 %
and subjected to accelerated
weathering test with no visible
defects after 2,000 hours in the
QUV Weatherometer. Its carbon
dioxide diffusion resistance
shall be 4.4 x 105 u. It shall
have a water vapour transmission
rate of 48.3 gm/m2/24 hours.
Cleaning the entire surface with
water and wire brushing to
remove algae, fungi, moss, etc.
Providing and applying SEALFLEX
heavy duty, high build,
elastomeric waterproofing
coating system on clean, dry,
oil and dirt free, sound
substrate in one coat of primer,
two coats of FORMELAST AF body
coat & two coats of FORMWAL 620
top coat. |
EXTERNAL WALLS
Erecting scaffolding, opening up
the defective areas and cracks
in ‘V’ groove upto 5 to 8 mm
width and depth as necessary.
Providing and applying a brush
coat of cement + AQUABOND 150
(polymer) in proportion 1:1.
Refilling the same with polymer
modified mortar in proportion
1:3.5 using screened sand and
adding polymer by 20% by weight
of cement. Curing the same at
least 3 days.