Calcium Silicate Board vs Gypsum Board: Which is Better for Interiors?
- Raj Arya
- Jul 26
- 3 min read
When it comes to modern interior construction, the choice of wall and ceiling panels significantly affects the durability, moisture resistance, fire safety, and long-term cost. At Wedge India, we often get asked:
“Should I use Calcium Silicate Board or Gypsum Board for my interiors?”
Let’s dive deep into this comparison to help you make the best decision for your project.
What Are These Materials?
Gypsum Board (also known as drywall or plasterboard)A lightweight panel made from gypsum (calcium sulfate dihydrate) sandwiched between paper liners. Popular for false ceilings and partitions in homes and offices.
Calcium Silicate Board (CSB)A durable board made from a mix of calcium and silicate materials, reinforced with cellulose fibers. It is known for high strength, thermal stability, and water resistance—widely used in commercial, industrial, and residential interiors.
Key Comparison: Calcium Silicate Board vs Gypsum Board
Feature | Calcium Silicate Board | Gypsum Board |
Durability | Very High – Impact & crack resistant | Moderate – Prone to dents and cracks |
Moisture Resistance | Excellent – Ideal for wet areas | Poor – Swells and warps with water |
Fire Resistance | Superior – Withstands high temperatures | Good – Can resist limited fire |
Weight | Heavier – Needs skilled installation | Lighter – Easier to install |
Sound Insulation | Good with proper backing | Good in dry environments |
Mold & Termite Proof | Yes – Highly resistant | No – Susceptible in humid areas |
Lifespan | 25–30 years | 10–15 years |
Cost | Slightly higher | Economical |
Where Should You Use Each?
Use Calcium Silicate Board for:
Bathrooms, kitchens, basements
Commercial buildings
Hospitals, schools, industrial partitions
Any area exposed to moisture, fire, or heavy usage
Use Gypsum Board for:
Bedrooms, living rooms, offices
Dry partitions and false ceilings
Budget residential projects
Why Wedge® Calcium Silicate Boards?
At Wedge India, we manufacture high-quality Wedge® Standard Calcium Silicate Boards that are:
Available in 6mm to 25mm thicknesses
Resistant to moisture, fire, and termite
Eco-friendly and asbestos-free
Perfect for false ceilings, drywalls, and partitions
Popular Size: 2440mm x 1220mmPrice: Starting from ₹700/sheet (6mm) including GSTSKU: WDG-CSB2440-06
Key Differences: Calcium Silicate Board vs Gypsum Board
Property/Criteria | Calcium Silicate Board | Gypsum Board |
Fire Resistance | Very high (Class A, up to 4 hours) | Moderate to high (typically 30–90 minutes) |
Moisture Resistance | Excellent – ideal for wet areas | Low (unless “moisture-resistant” variant) |
Termite/Fungal Proof | Yes | No |
Strength/Durability | High – resistant to cracking, impact, deformation | Moderate – can crack or sag in humidity |
Thermal Insulation | Superior – low conductivity, boosts energy efficiency | Good but less than calcium silicate |
Weight | Slightly heavier | Lighter, easier to lift and work with |
Workability | Needs power tools; harder to cut | Very easy to cut, install, and finish |
Surface Finish | Smooth, ready for paint/laminate | Smooth, ready for paint/laminate |
Applications | Fire-rated walls, ceilings, wet zones, industrial | Standard walls/ceilings in dry areas |
Cost | Higher upfront | Lower upfront |
Lifespan | 30+ years, low maintenance | 10–15 years, more susceptible to damage |
Conclusion: Which One Should You Choose?
If you're building for long-term performance, moisture resistance, and fire safety, Calcium Silicate Board is the clear winner. While Gypsum Boards offer a cost-effective solution for dry areas, they fall short in strength and durability.
While Gypsum Board remains a popular and economical choice for general interiors, Calcium Silicate Board emerges as the superior option for environments demanding higher performance. Its unparalleled fire, moisture, and impact resistance make it the intelligent investment for spaces where safety, durability, and long-term value are paramount.
At Wedge India, we are committed to providing premium Calcium Silicate Boards that not only meet but exceed industry standards, ensuring your interiors are built to last and perform under pressure. Contact us today to learn more about how our Calcium Silicate solutions can elevate your next project.
For Indian interiors, especially in humid and high-temperature zones, Wedge® Calcium Silicate Boards offer unbeatable value.
Looking for premium-grade Calcium Silicate Boards at competitive prices in India?We’ve got you covered! 💪
At Wedge India, we specialize in high-performance calcium silicate insulation boards and wedge-shaped sections designed for extreme industrial environments—cement kilns, steel plants, and high-temp piping systems.
🧱 Key Product Highlights:✅ Sizes: 2440x1220 mm | 600x150x100 mm blocks✅ Density: 220–260 kg/m³✅ Temperature Resistance: Up to 1100 °C✅ Price Range: ₹38/kg to ₹120/kg depending on type and use✅ Custom shapes & OEM supply available
📦 Bulk orders? Pan-India shipping? B2B partnership?We’re ready to serve EPCs, OEMs, and insulation contractors across India and beyond.
📲 Visit our product page for details:👉 https://www.wedge-india.com/insulation/calcium-silicate
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