Waterproofing consists of applying a sealing product to walls to block rainwater infiltration, while preserving vapor permeability. According to the CSTB, an untreated wall can absorb up to 8 liters of water per m²during an intense rainy episode.
Rates by Type of Waterproofing Treatment
| Type of treatment | Price/m² | Price/ml | Durability | Application |
|---|---|---|---|---|
| Surface water repellent (facade) | 15 - 35 € | - | 5-10 years | Porous facades |
| Impregnating water repellent | 25 - 50 € | - | 10-15 years | Stone, brick, plaster |
| Colored water repellent (renovation) | 40 - 80 € | - | 10-20 years | Aesthetic renovation |
| Resin injection (underground walls) | - | 100 - 200 € | 20-30 years | Cellars, basements |
| Capillary barrier (injection) | - | 80 - 150 € | 15-25 years | Rising damp |
| Waterproofing membrane | 50 - 100 € | - | 25-40 years | Underground walls |
* Price incl. tax including labor and supplies. Sources: Batichiffrage, Qualitel 2024.
Complete Budget Examples
Single-family house facade (100 m²)
Item details:
- High-pressure cleaning300 - 500 €
- Scaffolding (rental)500 - 1 000 €
- Impregnating water repellent (100 m²)2 500 - 5 000 €
- Application laborincluded
3 300 - 6 500 €
Total incl. tax
Durability: 10-15 years
ROI: protection + property valuation
Underground cellar (20 linear meters of walls)
Item details:
- Humidity diagnosis0 - 300 € (often free)
- Support preparation200 - 400 €
- Resin injection (20 lm)2 000 - 4 000 €
- Finish plaster500 - 1 000 €
2 700 - 5 700 €
Total incl. tax
Durability: 20-30 years
Ten-year guarantee included
Rising damp (30 lm)
Item details:
- Diagnosis + hygrometric measurements150 - 400 €
- Drilling + resin injection (30 lm)2 400 - 4 500 €
- Drying time3-6 months
- Plaster repair800 - 1 500 €
3 350 - 6 400 €
Total incl. tax
Durability: 15-25 years
Permanently eliminates rising damp
Financial Aid Available
Eligibility conditions
Waterproofing treatment alone is not eligible for state aid (MaPrimeRénov', CEE). However, if carried out as part of a global renovation:
✓ Eligible if coupled with:
- • External Thermal Insulation (ITE)
- • Facade renovation + thermal improvement
- • High-performance global renovation
Cumulative aid:
- • MaPrimeRénov': up to 75€/m² (ITE)
- • CEE: 5-20€/m²
- • VAT 5.5% (vs 10%)
- • Eco-PTZ: up to 50,000€
Tips for Getting the Best Price
- 1.Request at least 3 quotes: differences can reach 40% for the same service
- 2.Check certifications: Qualibat, ten-year guarantee, professional liability insurance
- 3.Compare products: request technical data sheets for the water repellents used
- 4.Prioritize autumn: less demand = more negotiable rates
- 5.Group the work: facade renovation + waterproofing = scaffolding savings
Sources et références
Cet article s'appuie sur des sources officielles et vérifiées pour garantir la fiabilité des informations.
- [1]Building price observatory— Qualitel
- [2]
- [3]Work price database— Batichiffrage
- [4]Energy renovation aid— ANAH
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Rédaction ZeroHumi
Équipe éditoriale ZeroHumi
Documentation technique vérifiée à partir des sources citées (ADEME, ANSES, OMS, CSTB, CEREMA)