BID Document for Guest House with Boundary Wall.pdf - Integrated ...

to maintain thinner plaster layer. All the joints in masonry should be raked for a depth of about 20 mm. In case
of plastering on concrete surfaces, the face should be roughened by chipping of about 5 mm. Oily, greasy and
efflorescence spots should be removed either by brushing, scrapping or both.
11.5 Laying:
In order to maintain uniform thickness of the plaster, the screeds are formed on the prepared wall surface before
actual plastering is started. Patches of plaster 15 cm x 15 cm are first of all applied at an interval of about 2 m
both horizontally and vertically over the surface. The two dots lying in vertical strips of mortar are formed
between dots. Then the plastering shall be started from the top and worked towards the bottom. The whole
surface shall be made flush between the screeds with wooden straight edges and rubbed thoroughly with wooden
floats. Rounding of corners if desired by the Engineer-in-charge shall be carried out in one operation.
11.6 Curing:
The plastered surface shall be kept wet by sprinkling water after 12 hours for at least 7 days and shall be
protected from rain or sun.
11.7 Thickness:
Unless otherwise specified or desired by E.I.C. the thickness of plaster shall be as follows:-
a) Plumbed Surface of Brick work - 15 mm
b) Rough Surface of brickwork - 20 mm
c) Vertical concrete surface - 10 mm
d) Ceiling of Roof, Chajja etc. -
10 mm Cement Pointing to Exposed Brick
Where shown on the approved drawings or specified in schedule of work, exposed brick faces shall be cement
ruled pointed. The mortar shall be raked out of the joints to a depth of 6 mm. The dust shall be brushed out of
the joints.
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