Waterproofing building work procedure - type, advantages, precautions

1. WATERPROOFING BUILDING WORK PROCEDURE -
TYPE, ADVANTAGES, PRECAUTIONS
What is the procedure of waterproofing ?
Water-proofing maintains the appearance of the building and
increases the life of the structure. New buildings rarely suffer
from leakages through waterproofing, but as the structure
becomes older, it settles unevenly, forms cracks in the walls
and then leakage seepage begins.
For better water-proofing work, the selection of quality material
and workmanship is important. Stress is laid on the procedures
and stages of the work, along with the checking methods for
workmanship.

2. In this chapter, we will study the tools required for water-
proofing, working procedures and stages of work for W.C.,
bathroom, terrace sloping roofs, water tanks, basement,
swimming pools working procedure for pressure grouting,
repairs and maintenance in water-proofing, use of chemicals
for water-proofing works, precautions and.care to be taken,
water-proofing for expansion joints etc.
MATERIAL REQUIRED FOR WATER-PROOFING AND
IT'S SPECIFICATIONS
Following materials are generally used for water-proofing work
(1) CEMENT
Ordinary Portland Cement is used for all water-proofing works.
For detailed specifications refer
(2) SAND
Clean river sand should be used for water-proofing work. If
muddy, the sand should be washed before use. For detailed
specifications.
(3) METAL
Hard angular metal of size varying from 12mm to 20mm size is
used for the water-proofing work. For detailed specifications
refer

3. (4) BRICK BATS
Brick bats should be well burnt pieces of bricks having proper
thickness. Underburnt and overburnt, brick bats should not be
used for water-proofing work. Brick bats shaped like half brick
or more, should only be used for water-proofing. Very
small pieces of bricks should be rejected. For
detailed specifications.
(5) WATER-PROOFING POWDER CHEMICAL
A number of chemicals and waterproofing compounds in
powder form are available in the market. The best out of the lot
should be selected for mixing in cement while during water-
proofing work.
(6) GERU RED COLOUR
For a coloured finish to water-proofing treatment, especially for
terraces, colour pigments are used in cement for the top coat.
For this, geru/red colour pigments are used.
(7) SHAHABAD TILES
25mm to 40 mm (1" to 1") thick rough Shahabad tiles of size
60cm x 90cm (2'0" x 3'0") are used for the box type treatment of
water-proofing to basement. For detailed specifications.
(8) G.I. Sockets

4. 25 mm (1") with 1.5 m to 2m (5' to 7) long pipe.
TOOLS REQUIRED FOR WATER-PROOFING WORK
Following tools are generally used for waterproofing work :
 25 mm G.I. sockets
 Trowel (thapi/nayala)
 Wooden float (randha)
 Plumb bob (olamba)
 Line string (dori) and red colour (for marking)
 Metal float (tipani)
 Hammer chisel (chhinni)
 Hacker (tacha)
 Screens for sieving the sand
 Spade (phauda)

5.  Mortar pan (ghamela)
 Right angle
 Ladder
 2.0m long ruler
 Wooden mallet
 15 cm (6") brush
 3.0m (10'.0") tape
 1.5m to 2.0m long G.I. pipes of diameter
 40mm, 50mm (1-", 2")
 Pressure grouting machine (if required)
 Measuring boxes (farma)
 M.S. tray
 G.I. bucket
 Plastic mug
 Barrel (drum)
 Arrangement for plastic paper/tarpaulin
 Level tube
 Spirit level
 Scaffolding material
WORKING PROCEDURE AND STAGES OF WORK OF
WATER-PROOFING
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