Roof and terrace waterproofing and repair
Starting costs about $9,370 in the United States and 1,660,000 NGN in Nigeria. After 12 months, this business can bring in about $3,240 net per month in the United States and 753,000 NGN in Nigeria. The starting money comes back in about 9 months, with 45 hours of work per week.
Mundyo estimates, data as of 2026-11-02.
See the numbers for my countryFree, no account, in the currency of 247 countries.
The numbers
| Country | To start | Net per month (month 12) |
|---|---|---|
| United States | $9,370 | $3,240 |
| Nigeria | 1,660,000 NGN | 753,000 NGN |
| United Kingdom | £6,420 | £2,170 |
| Kenya | 421,000 KES | 109,000 KES |
| India | 212,000 INR | 79,500 INR |
Amounts adjusted to each country's price and income levels.
The problem
Leaks, cracks and broken tiles damage walls and ceilings; owners struggle to find someone who diagnoses well and acts fast before the rainy season.
The solution
On-site diagnosis with photos, suitable repair or re-waterproofing (membranes, coatings, tiles, flashing) and an annual inspection contract.
Your customers
Owners of houses and flat roofs, residential buildings, small blocks, shops, warehouses and farm buildings.
How you make money
€50-100 diagnosis deducted from works; repairs €300-3,000, full redo priced per m²; annual inspection at €90.
Competition
Established roofers and waterproofing firms, general builders, informal workers and 'miracle' products sold in big-box stores.
Who has an edge
An experienced roofer, mason or waterproofer, comfortable at height, who documents diagnoses and gives a written guarantee.
The risks
Accidents at height, strong seasonality, long-term warranties in some countries and claims if leaks return.
The first 3 steps
- Train on common waterproofing products and working at height.
- Buy ladders, harnesses and basic tools, then get insured.
- Offer free diagnoses in one neighbourhood before the rains.
How the numbers are calculated
Example in a high-income eurozone country, at month 12: revenue €4,900 − costs €2,700 = €2,200 net per month. Revenue: 5 repairs × €800 + 10 inspections × €90. Costs: waterproofing materials, scaffolding, vehicle, construction insurance, social contributions. For other countries, Mundyo adjusts the starting budget to the price level (World Bank) and the income to prices and customers' purchasing power, then converts at the day's exchange rate.
Frequently asked questions
How much does it cost to start: Roof repair and waterproofing?
About $9,370 (United States), 1,660,000 NGN (Nigeria), £6,420 (United Kingdom), depending on the country. Mundyo calculates the amount for 247 countries.
How much can you earn per month?
After 12 months, about $3,240 (United States), 753,000 NGN (Nigeria), £2,170 (United Kingdom) net per month, after costs.
How long until I get my starting money back?
About 9 months, with 45 hours of work per week.
What are the risks?
Accidents at height, strong seasonality, long-term warranties in some countries and claims if leaks return.
Where do I start?
1. Train on common waterproofing products and working at height. 2. Buy ladders, harnesses and basic tools, then get insured. 3. Offer free diagnoses in one neighbourhood before the rains.
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