The conventional system of waterproofing involves
. This relies on the application of one or more
layers of membrane (available in various materials: e.g.,
bitumen, silicate, PVC, EPDM etc.) that act as a barrier
between the water and the building structure, preventing
the passage of water.
Virtually all building envelopes, particularly below-grade
areas and plaza decks, encounter hydrostatic pressure
from water during their lifetime. lifetime Therefore, the use
of a quality waterproofing system is essential to preserve
the water-tightness of the building envelope.
A waterproofing system which prevents the passage of liquid
water in the presence of hydrostatic pressure.
Protection as necessary.
A drainage system that reduces hydrostatic pressure.
Accessory products which complement, attach and detail the
waterproofing and drainage.
What is quality Waterproofing?
Waterproofing is the treatment of a surface to prevent
the passage of liquid water in the pressence of
Damp-proofing is the treatment of a surface to retard
the absorption of moisture in the absence of
PERMIABILITY OF CONCRETE
Portland cement mortar
and concrete can be
the use of any integral
materials; but in order
to obtain it considerable
care should be
exercised in selecting
Well-graded sands containing considerable graded fine
material are preferable for making impermeable concrete.
The consistency of the concrete mixture should be wet
enough so that it can be puddled, mixture should be well
spaded against the forms to avoid the formation of
pockets on the surface.
Care should be taken not to over trowel.
The use of excessive water, causes shrinkage cracks
and formation of laitance-seams.
Defective workmanship can result in improper
proportioning, lack of thorough mixing etc.
WHERE IT IS USED?
Positive Side Waterproofing: Positive side is
same side of the structure as the source of the
water. Designed to stop water before it has a
chance to enter the structure and cause structural
Negative Side Waterproofing: Interior side
opposite the water pressure side of the structure
Most commonly used in • Remedial work • Elevator
pits • Tank liners
Blind Side Waterproofing: Positive side applied
prior to installing the structural walls or slabs.
NATURE OF WAERPROOFING
Full adhesion to substrate: To prevent lateral migration of water between the
waterprofing material and substrate.
Factory controlled niform thickness: variance in thickness may lead to variable
Flexibility over cracks: able to widtstand substrate movement.
Resistance to high hydrostatic pressure
Positive drainage and protection of the waterproofing: Quality system should
include prefabricated drainage.
Track record: The system should be proven by time.
TYPES OF WATERPROOFING
Sheet Membrane Waterproofing
Lose laid – PVC, HDPE, etc.
Bonded – self-adhesive, hot applied
One or two component
Applied by hand, by spray
Hot applied, cold applied
Metal Oxide Waterproofing
• First surface is cleaned .
• Surface is covered with Bituminous coating.
• After that second layer of bituminous coating
• Polybelt sheet is layer is placed over hot
• Then again second layer of polybelt sheet is
• Similarly third layer of bituminous and polybelt
sheet is placed.
• Then finally covered with geotic sheet layer.
• Then protection layer of 100mm thick PCC is
• For horizontal waterproofing polybelt sheet is
used and for vertical waterproofing asplalt sheet is
Membrane Waterproofing With Insulation-On
• After doing proofing.
• layer of thermacol is laid.
• It is covered with cloth called zeotec and joints
are filled with bitumen.
• then scrid concrete (1:4:8)100thk. According to
required slope min.50mm to75mm is laid.
• thermacol layer is not laid adjacent to sides a
distance of 9mm is left and concrete is filled in it
so that rain water doesn’t penetrate in
cleaned and made suitable
for further application)
• Primer is applied by roller or
• Proofing -then resin is
• Surface will be rainproof
• Decorative covering
• A hard course providing
additional protection and
Advantages o using liquid water proofing-
• Minimum disruption
• Ease and speed of installation
• Cost effective
• Compatible with most substrates and easily detailed
• Proven and guaranteed performance
• Long life
• Technologically advanced
• Range of specifications to suit all needs
• Range of finishes including solar reflectives.
TAPECRETE is an acrylic based Polymer Modified
Cementitious Composite coating system.
Use of Tapcrete
TAPECRETE is used for surface treatment,
protecting, waterproofing and repairing concrete and
Waterproofing of basements, toilets, terraces, roofs,
swimming pools, water towers etc.
General concrete repairs.
Protection of concrete against corrosion, salt attack
• surface is cleaned.
• surface is made smooth with the layer of tape crete
• left for 2 hrs
• then coating of priemer.
• then 1st coating of tapecrete left for 1 day.
• then another coating of tapecrete.then protection
plaster(1:4)to protect layer of tapecrete.
METAL OXIDE WATER
• used in steel structures.
• Add metal-oxide compound to portland cement, sand, and water to
produce a slurry consistency . Blend together .
• Clean masonry surfaces
• Clean concreate surfaces
• Dampen surface for several hours prior to application with water and
maintain damp condition until applying waterproofing.
• Number of Coats: One bond coat and sufficient waterproof coats to make
the surface absolutely waterproof.
• Do not apply waterproofing when temperature is forecast to be 40 deg F
or less within 24 hours of application.
The ability to expand and contract as it absorbs and expels water; . It can
expand and contract an infinite number of times; . It can swell to 10 to 20
times its volume; It is
inorganic and does not break down with timeThe ratio of their surface area to
physical volume is large and this characteristic enables them to absorb large
quantities of water.
• Bentonite is a type of clay having the unusual
characteristics of cohesion, binding, sealing, and thickening.
• When installed below grade as a waterproofing membrane,
it becomes hydrated with the moisture that is naturally
present in the soil and forms an impermeable barrier that
absorbs and expels water .
• can expand and contract and is capable of absorbing
seven to 10 times its own weight in water, swelling up to 18
times its dry volume.
• to function properly as a waterproofing barrier, it is
extremely important that this barrier remain under a
constant minimum pressure of 30 to 60 pounds per square
A green roof is a roof of
a building that is partially
or completely covered
with vegetation and a
growing medium, planted
over a waterproof
membrane. Green roofs
are also referred to as
roofs and living roofs.
A green roof starts with a
waterproofing layer. For existing
roofs, the existing waterproofing
(asphalt shingles, tar and gravel,
etc.) can be used. For new
construction, a single-ply
membrane such as EPDM
(ethylene propylene diene
monomer) TPO (thermoplastic
polyolefin). EPDM and TPO are
quick to install, and also act as a
root repellent, preventing plant
roots from compromising the
• On top of the waterproofing layer are drainage, water retention and filter layers.
• Next up is the growing medium. This is usually a lightweight, custom mixture,
composed mostly of expanded stone, volcanic rock, perlite, with only a 10% to 20%
• Finally, come the plants. These are chosen to match the composition and depth of
the growing medium.
• Typically, a green roof also requires insulation. This can either be placed between
roof rafters (as in a typical roof), or above the waterproofing layer1. Vegetation
2. Vegetation drainage soil 200 mm
3. Separation layer
4. Drainage layer
5. Membrane (f.i. polypropylene)
6. ROOFMATE SL-A
7. Bituminous waterproofing
8. Concrete layer
Before the installation of your green roof, a project manager inspects the roof’s
structure, surface, condition, and drainage to determine the precise waterproofing
materials that will be used. Once the materials are on site waterproofing experts
prepare your roof by cleaning and repairing it’s surface and then applying layers of
waterproofing membranes, barriers, and sealers. These ultra-strong barriers help
protect the roof from dirt and root growth. Finally, layers of soil are added to aid in
overall drainage and plant nourishment.
Filter Fleece Soil and Plug