1. Hacking (tacha) of columns, beams including soffit, ceiling, lofts, etc.
in-situ works or precast components shall be checked. Tacha should be one per
square inch. Removal of plastic/oil skin from old concrete surface shall
be ensured.
2. The line, level and plumb of masonry and door window frames shall be
checked.
3. Proper raking of masonry joints shall be ensured. Masonry joints shall be
inspected for hollowness. Hollow joints, if any, shall be
refilled.
4. Fix katka (aggregate) with mortar & chicken mesh at junction of the
masonary with concrete surfaces.
5. Wetting of wall surfaces shall be ensured before starting the plaster by
spraying water. The concrete surfaces should be sprayed with cement slurry.
6. Necessary scaffolding shall be erected as required. No scaffolding member
should be inserted directly into the masonary. Proper bracing of the masonary
should be done.
7. a) Plaster pads, (Thickness Indicators or T.I.) of required thickness (12 mm or
as specified) shall be taken on the walls.
b) The
plaster pads shall come within the range of aluminium square tubes which shall
be used for maintaining the uniform level of surface of plaster.
c) T.I.
should be taken at least one day before.
8. Sand to be used for plaster shall be sieved on 4.75 mm sieve.
9. Dry mixing of mortar of specified mix shall be done on
raised platform/steel plates. Wet mixing shall be done thoroughly as and when
required. No centering plate should used as platform for the same. Use of
mortar within 30 minutes (before setting time) after adding water shall be
ensured.
10. Plastering shall be carried out in two coats. The first coat itself shall
be in plumb, line and level.
11. The surface shall be roughened with wire brush immediately after the first coat
so as to give a proper bondage with the second coat. The second coat should be
of richer mix so as to prevent the porosity from reaching the below plaster
& thereafter the masonary.
12. The second coat should have a minimum thickness of 6 mm. Second coat shall be
with specified waterproofing compound for plastering on south-west sides.
13. Plumb, right angle, level of plaster; required size of door/window frames after
plaster, plumb and level of door/window jambs, shall be checked.
14. Mortar splashes on door window frames shall be cleaned & the
entire area should be cleaned after day's work is completed.
15 Plastering shall be cured by watering for 7 days. Please hold the pipe at the
top of the plastered component and let the water cascade down. This increases
absorption of water and doesn't waste it.
