Before comparing prices
Define the variables behind the quote
Roof orientation, shading and structure
Electrical and heating-system upgrades
Accreditation, warranties and commissioning
Quote checklist
Ask every tradesperson to price the same brief
- Labour and named materials
- Preparation and protection
- Access equipment and waste
- VAT and provisional allowances
- Testing or certification
- Making good and final finish
- Programme and payment stages
- Warranty and snagging