Standard Operating Procedure for internal and external plastering works ensuring durability, aesthetic finish, and quality workmanship as per IS 1661:1972 specifications.
To establish a standardized procedure for plastering works ensuring smooth, durable, and aesthetically pleasing wall finishes while maintaining quality standards and structural integrity for both internal and external surfaces in accordance with project specifications.
This procedure applies to all internal and external plastering activities including surface preparation, mixing, application, finishing, and curing for walls, ceilings, columns, and other areas requiring plaster treatment in residential, commercial, and industrial construction projects.
Oversees quality compliance & specifications
Leads plastering team & ensures proper execution
Ensures PPE usage and safety protocol adherence
Execute plastering work & material handling
Conducts inspections & rectifies defects
Ensures timely availability of required materials
OPC 43/53 Grade or PPC as specified
Well-graded, silt-free sand (FM 2.0-3.0)
Clean potable water free from impurities
Waterproofing compounds, plasticizers
Plumb bob, spirit level, straight edge, measuring tape
Trowels, floats, hawks, screeds, brushes
Mechanical mixer, pans, buckets, gauge boxes
Secure platforms for height work
Verify total thickness is within ±2mm of specification (Internal: 12-15mm, External: 18-20mm)
Max 3mm deviation when checked with 2m straight edge in any direction
Maximum 3mm deviation per meter height; 8mm max for full height
No visible cracks greater than 0.5mm width permitted
Consistent finish as per specifications; no trowel marks or blemishes
Test by tapping with wooden mallet; no hollow sounds indicating poor adhesion
Perfect right angles at internal corners; rounded as specified for external corners
Water test for external plaster after 21 days; no water penetration
Helmets, gloves, goggles, dust masks, safety boots, and reflective vests mandatory
Inspect daily, stable base, proper guardrails, access ladder, maximum load limits observed
Proper lifting techniques, team lifting for loads >25kg, use mechanical aids when possible
Clean work area, clear access paths, proper waste disposal, organized material storage
Waterproof connections, GFCI/ELCB protection, regular inspection of cords and equipment
No work during storm warnings, lightning, heavy rain, or strong winds (>25 km/h)
SDS for all materials, emergency eyewash station, calcium chloride/admixture handling protocols
First aid kit readily accessible, trained first aider on site, emergency contact information displayed
Minimize water wastage during curing and cleaning, collect and reuse where possible
Reuse leftover mortar for non-critical applications, proper segregation of waste
Water spraying during mixing, dust barriers around work area, covered material storage
Avoid extreme temperatures (<5°C or >40°C), protect from rain, adjust curing methods by season
Work in smaller sections for better control; avoid overworking finishing coat
Sprinkle water lightly during finishing for smoother results without weakening plaster
Apply mesh at all internal corners (wall-ceiling) to prevent cracking
Add set retarders to mortar, dampen surface more frequently, work during cooler hours
For smooth concrete surfaces, scratch with wire brush in crisscross pattern for better adhesion
Add small amount of lime (5-10%) to improve workability and reduce cracking
Heat mixing water slightly and protect fresh plaster from freezing for at least 48 hours
Clean tools immediately after use and oil metal surfaces to prevent rusting
By following this Standard Operating Procedure, plastering works will be executed with consistent quality, durability, and aesthetic appeal. The steps outlined ensure that the finished plaster surfaces meet structural requirements while providing excellent finished surfaces for subsequent works such as painting or tiling. Proper execution and attention to detail during each phase of plastering will result in high-quality finishes that enhance the overall construction quality and provide long-lasting protection to structural elements.