Mainstreet Brick Business Plan — The Unit Economics of Brick Making
What a single brick costs to make and sell: cement, aggregate, labour and energy, and the cents-per-unit margin that results.
The Unit Economics of Brick Making
Jump to section
- Overview & contents
- i. Important Notice and Basis of Preparation
- 1. Executive Summary
- 2. The Unit Economics of Brick Making
- 3. Market Analysis
- 4. Products and Positioning
- 5. SWOT and Competitive Position
- 6. Site, Plant and Production
- 7. Route to Market and Sales Strategy
- 8. Regulatory, Environmental and Quality Compliance
- 9. Management and Organisation
- 10. Capital Requirement and Funding
- 11. Financial Projections
- 12. Break-Even Analysis
- 13. Debt Service and Working Capital
- 14. Investment Returns
- 15. Sensitivity and Scenario Analysis
- 16. Value Creation Levers
- 17. Risk Management
- 18. Implementation Timeline
- 19. Conditions for Success and Exit Options
- 20. Key Performance Indicators
- 21. Key Assumptions
- 22. Conclusion
- A. Appendix A: Consolidated Financial Summary
- B. Appendix B: Capital and Depreciation Schedules
- C. Appendix C: Funding and Debt Schedules
- D. Appendix D: Risk Register
- E. Appendix E: Glossary
Everything in this plan follows from the economics of a single unit. A concrete masonry unit is cement, aggregate, water and compaction — and cement is by far the most expensive ingredient.
|
Product |
Ex-works price |
Cement per unit |
Material cost |
Gross margin |
Margin % |
|---|---|---|---|---|---|
|
Stock brick (7 MPa) |
R1.85 |
0.31 kg |
R1.33 |
R0.52 |
28.1% |
|
Maxi brick (90 mm) |
R4.10 |
0.56 kg |
R2.43 |
R1.67 |
40.7% |
|
M140 hollow block |
R8.60 |
1.15 kg |
R5.18 |
R3.42 |
39.8% |
|
M190 hollow block |
R11.50 |
1.45 kg |
R6.53 |
R4.97 |
43.2% |
Two structural facts emerge. First, cement is roughly 43 per cent of material cost across the range, and is bought from a concentrated supplier group with limited negotiating room for a small producer. Cement price movements pass almost directly to the bottom line, which is why the sensitivity analysis in Section 15 treats cement as a primary risk rather than a routine input.
Second, the margin ranking is the inverse of the volume ranking. The stock brick — the highest-volume, most-requested product — returns 28 per cent while the M190 hollow block returns 43 per cent. The reason is geometric: a hollow block uses roughly 4.9 times the material of a stock brick but sells for 6.2 times the price, because it replaces several bricks in a wall and saves the builder mortar and labour.
2.1 The correction that matters: margin per unit of capacity
|
Product |
Gross margin per unit |
Margin % |
Capacity slots consumed |
Margin per 1 000 slots |
|---|---|---|---|---|
|
Stock brick (7 MPa) |
R0.52 |
28.1% |
1.00 |
R520 |
|
Maxi brick (90 mm) |
R1.67 |
40.7% |
3.75 |
R445 |
|
M140 hollow block |
R3.42 |
39.8% |
6.43 |
R532 |
|
M190 hollow block |
R4.97 |
43.2% |
13.85 |
R359 |
Materials alone consume roughly two-thirds of revenue, and cement alone 29 per cent. That is the defining feature of the cost structure and the reason a bulk cement supply agreement is treated as a condition precedent rather than a procurement preference.