7 KEY BENEFITS OF USING CLC FOR WEATHERING COURSE
Choosing the right weathering course material is crucial for long-term durability, cost
savings, and energy efficiency. Here's why CLC is an excellent choice for modern
construction projects
1.COST SAVINGS
CLC weathering course costs ₹80 -
100/sq.ft, whereas the conventional brick jelly lime concrete method costs ₹160-200/sq.ft,
including hacking with kaduka and jaggery water. That's nearly 50% savings!
2.FASTER INSTALLATION
CLC weathering course requires only one day to lay,
compared to 30-40 days for conventional brick jelly lime concrete. This significantly
reduces project duration.
3.REDUCED STRUCTURAL LOAD
CLC weighs 900-1100 kg/m³
Traditional brick jelly lime concrete weighs 1800-2000 kg/m³
50% weight reduction leads to lower structural reinforcement costs.
4.LOWER WATER ABSORPTION
Initial absorption is 20%, reducing to 6-8% over time.
CLC prevents water percolation, ensuring quicker rainwater drainage.
Reduces risk of structural deterioration by protecting steel reinforcement from corrosion.
5.STRENGTH IMPROVEMENT OVER TIME
Compressive strength: 2-3 MPa in 28 days, increases to 6-8 MPa with aging due to continuous
hydration of lime and fly ash.
6.HEAT RESISTANCE
CLC transfers minimal heat to the RCC slab below, enhancing energy efficiency by keeping
interiors comfortable year-round-cooler during summer and warmer in winter.
This helps reduce reliance on air conditioning and heating, leading to potential energy
savings.
7.SOUND INSULATION
The air voids in CLC act as sound barriers, minimizing noise transfer. This is especially
beneficial in residential buildings, where foot traffic on terraces is common.
COMPARISON CLC VS TRADITIONAL WEATHERING COURSE
Traditional brick jelly lime concrete takes 40 days for 2500 sq. ft, weighs 1800 kg/m³, and
costs ₹160-200/sq.ft.
CLC weathering course takes just one night (10 PM - 6 AM), weighs 900 kg/m³ after curing and
costs ₹80-100/sq.ft.
Suitable finishings: Kerala burnt clay tiles, terracotta pressed weathering tiles, or cool
roof tiles.
SITE REQUIREMENTS BEFORE CLC POURING
✔ Terrace surface must be cleaned properly.
✔ Coving plastering at parapet wall & slab junction to be completed.
✔ Waterproof coatings & leak tests (e.g., ponding) should be verified.
✔ Plumbing lines running along parapet walls should be completed.
✔ Bull marks to be fixed at 2-3m intervals for proper leveling.
✔ Expansion joints (4½-inch brick walls) required every 15m.
✔ Scaffolding for slurry pipe delivery support to be provided.
