Calcium Silicate Board vs Gypsum Board: Key Differences and Applications
When it comes to interior finishing, choosing between calcium silicate board and gypsum board is a common dilemma. Both materials are widely used in construction, but they have distinct properties, advantages, and ideal applications. Below, we compare these two materials in terms of composition, fire resistance, usage, pricing, and more.
1. Material Composition
Gypsum Board
- Made from gypsum plaster sandwiched between two layers of paper.
- The paper surface helps prevent cracking and enhances durability.
- Available in moisture-resistant, fire-resistant, and standard variants.
Calcium Silicate Board
- Composed of silica (SiO₂), calcium (CaO), reinforcing fibers, and additives.
- Manufactured through high-pressure steam curing for enhanced strength.
- Often marketed as asbestos-free for safety.
2. Fire Resistance
Gypsum Board
- Rated B1 (Flame Retardant).
- Produces smoke and gases when exposed to fire.
Calcium Silicate Board
- Rated A (Non-Combustible).
- Does not emit toxic fumes when burned.
- Preferred for high-fire-risk areas like ducts and commercial spaces.
3. Common Applications
Gypsum Board
- Ideal for residential ceilings and partitions.
- Easy to shape and install but not suitable for damp areas.
Calcium Silicate Board
- Used in commercial and public spaces (theaters, museums, subway stations).
- Excellent for fireproofing, moisture-prone areas, and high-impact walls.
4. Installation & Workability
Gypsum Board
- Easier to cut and shape, making it more flexible for curved designs.
- Produces less dust during installation.
Calcium Silicate Board
- Harder to cut, generates more dust.
- More durable but less adaptable for intricate designs.
5. Price Comparison
- Gypsum Board: ~$25–$45 per sheet (2400×1200×9.5mm).
- Calcium Silicate Board: ~$45–$70 per sheet (2440×1220×8mm).
6. Standard Sizes & Thickness
Gypsum Board
- Common sizes: 2400×1200×9.5mm, 2400×1200×12mm.
Calcium Silicate Board
- Common sizes: 2440×1220×8mm, 2400×1200×10mm.
Conclusion
- Choose Gypsum Board for residential projects where ease of installation and cost matter.
- Choose Calcium Silicate Board for fireproofing, moisture resistance, and high-traffic areas.
For architects and designers, understanding these differences ensures the right material selection for durability, safety, and aesthetics.