Which Size to Choose?
| 2″ (50mm) | Lift/elevator shaft walls, false ceiling enclosures, narrow decorative partitions. |
| 3″ (75mm) | Toilet/bathroom partitions, utility room dividers, light interior screens. |
| 4″ (100mm) | Most common internal partition size. Non-load bearing walls inside homes and offices. |
| 5″ (125mm) | Semi-external walls. Staircase enclosures where 4" feels insufficient. |
| 6″ (150mm) | Standard external wall for residential buildings. Best balance of cost and insulation. |
| 8″ (200mm) | External walls needing 4-hour fire rating. Premium residential and commercial projects. |
| 9″ (225mm) | Replaces traditional 9" brick wall exactly. Maximum strength, 6-hour fire resistance. |
AAC Blocks vs Red Bricks
| Feature | AAC Blocks | Red Bricks |
|---|---|---|
| Size | 600×200×50–225 mm | 225×100×75 mm |
| Weight | 3.5–19 kg/block | Much heavier (equiv. vol.) |
| Density | 550–650 kg/m³ | 1,500–1,700 kg/m³ |
| Strength | >4 N/mm² | 3–4 N/mm² |
| Thermal Insulation | 0.16 W/m·K (excellent) | 0.81 W/m·K (poor) |
| Fire Resistance | Up to 6 hours | Up to 2 hours |
| Sound Reduction | 45 dB | 30–40 dB |
| Water Absorption | 5–10% | 15–20% |
| Mortar Joint | 3–5 mm (thin-bed) | 15–18 mm |
| Eco-Friendly | ✓ Uses recycled fly ash | ✗ Depletes clay |
Technical Specifications
| Type | Autoclaved Aerated Concrete (AAC) — Grade 1 |
| Standard | ISI:2185 Part 3 · ISO & BIS Certified |
| Face Size (L×H) | 600mm × 200mm (same for all thicknesses) |
| Available Sizes | 2″ · 3″ · 4″ · 5″ · 6″ · 8″ · 9″ |
| Block Weights | 3.5 · 4 · 9 · 9.5 · 13 · 17 · 19 kg |
| Density | 550–650 kg/m³ |
| Compressive Strength | ≥ 4 N/mm² (Grade 1) |
| Thermal Conductivity | 0.16 W/m·K |
| Fire Resistance | 2 hrs (50mm) → 6 hrs (225mm) |
| Sound Reduction | 45 dB (200mm wall) |
| Water Absorption | 5–10% |
| Joint Mortar | AAC thin-bed mortar · 3–5 mm joint thickness |
| Min. Order | 500 units per size |
Why Choose AAC Blocks?
- ✓3–4× lighter than clay bricks — reduces structural dead load, saves on steel and foundation cost
- ✓Excellent thermal insulation (0.16 W/m·K) — lower AC bills, cooler rooms in Tamil Nadu heat
- ✓Large 600×200mm face — fewer blocks needed, construction 30% faster than red bricks
- ✓ISI:2185, ISO & BIS certified — accepted by all banks for home loans
- ✓Up to 6-hour fire resistance, termite proof, moisture resistant, dimensionally precise
- ✓Eco-friendly — uses recycled fly ash from thermal power plants
- ✓Easy to cut, drill and shape with standard hand tools — less on-site waste