Aug 6, 2021

Internal Plaster Work - Standard Work Procedure

Internal Plaster Work


Introduction:

This standard operating procedure enumerates the scope of Internal Plasterwork to be executed in the Tower area as specified in the approved drawings and at places when instructed by the Tower-in-charge.


Responsibility:  

The respective Tower-in-charge is responsible to execute the work as per the procedure.

Safety & protection:

Working space to be clear of debris so that easy access is ensured.

Scaffolding to be checked for the load carrying capacity and ensure no overloading.

Lifting, manual transporting of materials have to be carried out by workers who are properly trained. Otherwise this may cause serious injuries to workers.

Throwing of debris from height strictly prohibited.

PPEs should be used properly.
 

Preparatory Works: 

All the nails, binding wire, masking tapes and wooden piece shall be removed from concrete surface.

All the dust, oil spots, and green algae, if any shall be cleaned from concrete and Blockwork surface with the help of wire brush.

Proper scaffolding shall be provided to allow easy approach to every part of the work. 

In no case, holes in Blockwork should be done for supporting scaffolding.
At place of work where sufficient natural daylight is not available, artificial light shall be made available.

Level pads of size not less than 2 x 2 shall be made on the walls and if required on ceiling also to serve as finished reference level surface. 

The distance between level pads shall not exceed 6 in any direction so that their surface alignment can be checked with the help of aluminum straight edge.

Level pads shall also be checked for vertical alignment with the help of plumb bob, for right angle with the help of right angle and for diagonal dimension of room with the help of tape.

Fiber mesh should be fixed on all concrete and blockwork joints (except base course joint). 

In case of level differences in adjoining surfaces, the same shall be made up before fixing of chicken mesh.

Ensure Concrete surface roughened for proper bonding.

All electrical chases shall be filled with cement mortar and properly rendered with non-shrink grout and application of fiber mesh over it. Curing should be done for 7 days before starting any type of plaster.

All the conduit drops shall be checked and concealed with plaster. If any visible in opening area.

All the ceiling points and wall points shall be checked for level and dimensions as per drawing or as per clients requirement if any. All electrical boxes and light points should be in line with finish face of plaster.

Ensure all electrical boxes are protected with plastic sheet packing before plaster.

Do wet the surface to receive plaster one hour before, so that while starting plastering, the surface is skin dry.


Work method for plastering: 

The mortar for plastering has to be prepared in Tray or on a firm or on metal sheets only.

Do prepare the mortar in clear area in proportion as follows;

Bond Coat / Key Coat  1:4 with 6mm fibers @ 100 grams per bag of cement (Strongplast)

Finish Coat  1:5 with 6mm fibers @ 100 grams per bag of cement (Strongplast).

Do mix mortar which can be consumed with in next 2 hours.

For kitchen and ducts plaster 100% Crush Sand should be use.

For toilets plaster Crush sand and river sand in 50:50 % proportions should be use.

Do add water to the dry mixed sand and binder (not otherwise).

While applying plaster on walls, empty cement bags shall be placed on floor near walls and rebounded mortar fallen on bags shall be put back into mixed mortar before it sets and 10% additional cement should be added in that mix and remixing should be done before its use.

Proper checking and supervision for plumb, line, right angle, measurement of openings after application of plaster should be done by site supervisor / engineer.

Electrical switch boxes shall be perfectly in line with plaster.

For Bond Coat / Key Coat curing should be done for minimum 3 days.

For finish Coat Curing should be done for minimum 10 days.

After completion of plaster clean the floor and all electrical boxes.


Team
CBEC India

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