A well-constructed foundation distributes building load to the soil and prevents settlement, cracking, and structural failure. Here is the sequence used on residential projects across Haryana and Rajasthan.
Step 1: Site Survey and Soil Check
Before excavation, verify:
- Soil bearing capacity (most residential areas in Haryana: 1.0–1.5 T/m²)
- Water table depth (important for foundation depth decisions)
- Property boundary markings and setback requirements
Step 2: Excavation
- Typical residential foundation depth: 1.0–1.5 metres below ground level
- Width: For a 9-inch wall, foundation width is typically 2–2.5 feet at the base, stepping in with each course
- Ensure excavation bottom is level — use a dumpy level or laser level for accuracy
- Remove loose soil and compact the excavation base
Step 3: PCC (Plain Cement Concrete) Base
A 3–4 inch layer of 1:4:8 or 1:5:10 PCC is laid at the bottom of the excavation:
- This provides a level, clean surface for brickwork
- Prevents soil moisture from directly contacting foundation bricks
- Allow 24 hours curing before starting brickwork
Step 4: Foundation Brickwork
Foundation bricks are laid in 1:4 cement-sand mortar (stronger than wall mortar):
- Start with the widest course at PCC level, typically 2 bricks wide (18 inches)
- Each subsequent course steps in by half a brick on each side
- For a single-storey building: 4–5 courses of stepping, reaching 9-inch wall width at plinth level
- For two-storey: 6–7 courses with wider base
- All joints must be fully filled — no gaps or voids in foundation mortar
Step 5: DPC at Plinth Level
At plinth level (150mm above ground level), install a Damp Proof Course:
- 40mm thick 1:1.5:3 concrete with waterproofing compound
- This prevents rising damp from entering the building walls above ground
Step 6: Backfill and Compaction
After foundation brickwork reaches plinth level:
- Backfill excavated area with clean earth in 200mm layers
- Compact each layer with a plate compactor or manual rammer
- Do not use construction debris for backfilling — it settles unevenly
Why Foundation Bricks Must Be High Quality
Foundation bricks are permanently buried underground in contact with soil moisture. Low-quality bricks deteriorate over years, causing foundation failure. Use only well-fired Zigzag kiln bricks with water absorption below 16% for foundation work. BBC1 bricks meet this specification consistently.
For bulk foundation brick orders, call +91 97280 65410 or use our quote form.