What Are 8 Hole Bricks?
8 hole bricks (also called 8 perforation bricks or 8-core bricks) are a type of perforated clay brick featuring eight evenly spaced holes running through their length. These perforations account for approximately 35–45% of the brick's volume, making them significantly lighter than both solid bricks and 3-hole variants.
8 hole bricks are the preferred choice in modern RCC-framed construction across India. They comply with IS 2222:1979 (Burnt Clay Perforated Building Bricks).
8 Hole Brick Dimensions, Weight & Specifications
| Specification | Details |
|---|---|
| Standard Size | 190 × 90 × 90 mm (Modular) |
| Also Available | 230 × 110 × 70 mm (Conventional) |
| Number of Holes | 8 (arranged in 2x4 pattern) |
| Hole Size | 18–22 mm × 30–35 mm (rectangular) |
| Perforation Area | 35–45% of face area |
| Weight (per brick) | 1.7 – 2.2 kg |
| Compressive Strength | Min. 5 N/mm² (IS 2222) |
| Water Absorption | Less than 20% |
| IS Standard | IS 2222:1979 |
8 Hole Brick Price in India (2026)
| State/Region | Per 1000 Bricks | Per Brick |
|---|---|---|
| Delhi NCR / Haryana | Rs 8,500 – Rs 11,500 | Rs 8.5 – Rs 11.5 |
| Rajasthan | Rs 7,000 – Rs 9,500 | Rs 7 – Rs 9.5 |
| Uttar Pradesh | Rs 6,500 – Rs 8,500 | Rs 6.5 – Rs 8.5 |
| Gujarat | Rs 9,000 – Rs 12,000 | Rs 9 – Rs 12 |
| Maharashtra | Rs 10,000 – Rs 14,000 | Rs 10 – Rs 14 |
| Tamil Nadu / Karnataka | Rs 8,000 – Rs 11,000 | Rs 8 – Rs 11 |
GST Note (2026): 8 hole clay bricks attract 12% GST in India. Prices quoted by suppliers may or may not include GST — always clarify before ordering. Demand a proper GST invoice for ITC benefits on commercial projects.
Key Advantages of 8 Hole Bricks
- 25–30% Lighter: Compared to solid bricks, 8 hole bricks drastically reduce dead load — crucial for multi-storey RCC structures.
- Superior Mortar Bond: Eight perforations provide more surface area for mortar penetration, creating a stronger masonry bond.
- Better Thermal Performance: More air pockets mean better insulation. Walls built with 8 hole bricks stay 3–5°C cooler in summer.
- Sound Insulation: The multiple air cavities absorb sound vibration, improving acoustic performance in residential buildings.
- Faster Construction: Lighter weight means masons can lay bricks faster, reducing labor hours by 10–15%.
- Eco-Friendly: Less clay consumption per brick reduces kiln fuel consumption and carbon footprint.
8 Hole Bricks vs 3 Hole Bricks — Detailed Comparison
| Parameter | 8 Hole Bricks | 3 Hole Bricks |
|---|---|---|
| Weight | 1.7–2.2 kg | 2.0–2.5 kg |
| Perforation % | 35–45% | 25–30% |
| Compressive Strength | Min 5 N/mm² | Min 3.5 N/mm² |
| Thermal Insulation | Excellent | Good |
| Sound Insulation | Better | Average |
| Price (per 1000) | Rs 6,000–Rs 12,000 | Rs 5,000–Rs 11,000 |
| IS Standard | IS 2222 | IS 1077 |
| Best Application | RCC frame infill walls, high-rise | Low-rise load-bearing walls |
Where Are 8 Hole Bricks Best Used?
- Infill walls in RCC frame structures — The most common application in modern apartments and commercial buildings
- Interior partition walls — Where sound insulation and light weight are priorities
- High-rise construction above G+3 — Every kilogram saved at upper floors translates to significant structural savings
- Green Building projects — IGBC and GRIHA-rated buildings prefer perforated bricks; for maximum green rating, consider 10 hole bricks which offer even higher perforation and lower thermal conductivity
- Industrial buildings — Factory walls and warehouse partitions
Structural Considerations — When NOT to Use 8 Hole Bricks
Despite their advantages, 8 hole bricks are not recommended for:
- Foundation work or below-grade construction
- Retaining walls (lateral earth pressure)
- Unreinforced load-bearing walls in seismic zones III, IV, and V
- Areas with high groundwater or flood-prone zones
How Many 8 Hole Bricks Do You Need?
Use this simple formula for a standard 4.5-inch (115 mm) thick wall. For a complete walkthrough with examples for full houses and boundary walls, see our detailed brick calculation guide:
- Bricks needed = Wall area (sq ft) × 6.5 (including 5% wastage)
- Example: 1,000 sq ft of wall area = 6,500 bricks
- For 9-inch walls: multiply by 13
Expert Insight — Naresh Sihag, BricksStreet: "In modern G+4 and taller buildings, switching from solid to 8 hole bricks for infill walls can save Rs 80,000–Rs 1,50,000 in structural steel cost for a 2,000 sq ft apartment, because of reduced dead load. The brick cost is nearly the same."
Buying Checklist for 8 Hole Bricks
If you are comparing options, also check our buying guide for 3 hole bricks and 10 hole bricks to pick the right type for your project.
- Ask for IS 2222 test certificate from the kiln
- Check compressive strength report (min 5 N/mm²)
- Verify uniform hole size and positioning
- Ensure minimum 25 mm shell (outer wall) thickness
- No cracks in the web (partition between holes)
- Consistent red/deep-red color — no black patches (under-fired)
Frequently Asked Questions — 8 Hole Bricks
What is the price of 8 hole bricks in India in 2026?
In 2026, 8 hole brick prices range from Rs 6.5 to Rs 14 per brick across India. Delhi NCR and Haryana: Rs 8,500–Rs 11,500 per 1000. Rajasthan: Rs 7,000–Rs 9,500 per 1000. Maharashtra is the costliest at Rs 10,000–Rs 14,000 per 1000. Prices are ex-kiln and exclude transportation and 12% GST unless stated.
What is the weight of an 8 hole brick?
An 8 hole brick weighs between 1.7 kg and 2.2 kg, making it approximately 25–30% lighter than a solid clay brick of the same size. This weight reduction significantly lowers the dead load on RCC structures, which can reduce structural costs on multi-storey buildings.
What IS standard governs 8 hole bricks in India?
8 hole perforated bricks in India are governed by IS 2222:1979 (Burnt Clay Perforated Building Bricks). The standard requires a minimum compressive strength of 5 N/mm² and limits perforation area to a maximum of 45% of the face area. Shell thickness must be at least 25mm and web thickness at least 13mm.
Are 8 hole bricks stronger than 3 hole bricks?
Yes. 8 hole bricks under IS 2222 require a minimum compressive strength of 5 N/mm² vs 3.5 N/mm² for IS 1077 Class 3.5 (3 hole bricks). However, 8 hole bricks are NOT recommended for load-bearing walls in high seismic zones — they are best used as infill in RCC frame structures where the frame carries the load. Read more: 3 hole bricks complete guide.
How many 8 hole bricks per square foot of wall?
For a standard 4.5 inch (115mm) wall: approximately 4.5 bricks per sq ft. For a 9 inch (230mm) wall: approximately 9 bricks per sq ft. Add 10% for wastage. Since 8 hole bricks use the same nominal dimensions as conventional bricks, the calculation is identical.
Can 8 hole bricks be used in bathrooms and wet areas?
With proper waterproofing, yes — but it is not ideal. 8 hole bricks have higher water absorption potential due to the perforations. For wet areas like bathrooms, kitchens, and external plinth areas, it is better to use solid bricks or AAC blocks with proper waterproofing treatment. If using 8 hole bricks in wet areas, ensure the mortar fully fills the perforations and apply two coats of waterproof plaster.
