Free Waterproofing Contractor Invoice Template

What is a Waterproofing Contractor invoice?

A waterproofing contractor invoice covers work installing systems to prevent water ingress in basements, foundations, roofs, wet rooms, and other water-affected areas. Waterproofing includes cavity drain membrane systems for basement conversions, cementitious tanking for below-ground walls, injection damp proofing, chemical damp-proof courses, flat roof waterproofing membranes, and wet room waterproofing systems. Because damp and water ingress can have severe long-term structural consequences, guarantee documentation is important. Many waterproofing products come with manufacturer-backed guarantees of 10-25 years when installed by certified applicators. Invoices should reference the system used, the manufacturer, and the guarantee terms to help clients understand the value of the work.

What to include on a Waterproofing Contractor invoice

• Property address and area treated
• Waterproofing system type and manufacturer
• Surface preparation work
• Material quantities and specification
• Drainage provisions (cavity drain, sump pump)
• Guarantee reference and term (years)
• Certified applicator reference (if manufacturer certification required)
• Labour and materials breakdown
• VAT details if VAT-registered
• Payment terms

Common waterproofing contractor invoice line items

How to invoice as a waterproofing contractor

Invoice in stages for larger basement conversions: preparation, membrane/tanking installation, drainage, plastering. For smaller jobs (DPC injection, wet room tanking), invoice on completion. Attach the manufacturer's guarantee certificate and your certified applicator documentation with the final invoice.