What to consider
Keep the exact product data, measured insulated area, invoices and required installation photographs. Ask who supplies each document and confirm application timing. Include an affordable plan if a subsidy is not granted; this guide quotes no subsidy amount.
Apply this to your roof
Record your preferences in the roof plan. Final dimensions, product suitability and the complete build-up are assessed for the actual roof; keep the agreed details and manufacturer instructions with your project documents.