CPV Code 4546 – Roofing Work
What does CPV code 4546 cover?
CPV code 4546 (Roofing work) covers all services related to roofing: roof covering (tiles, slate, metal, bitumen shingles), flat roof waterproofing (bitumen, plastic sheets, liquid waterproofing), sheet metal work (gutters, downpipes, flashings), roof insulation and green roofing. Integration of photovoltaic systems into the roof skin is increasingly part of the scope.
The roof is one of the most critical building components: it protects against weather, contributes significantly to energy efficiency and has a lifespan of 30–60 years for public buildings depending on material and execution.
Who uses this CPV code?
Roofing works are tendered for new builds as part of the construction project and for existing buildings as standalone renovation measures. Typical scenarios include roof renovation of public buildings (schools, sports halls, town halls – often combined with energy upgrades), new build projects, flat roof renovation, green roofing for municipal climate adaptation, and photovoltaic integration.
The bidder side comprises roofing and sheet metal businesses, often covering both trades. The roofing trade has around 15,000 businesses in Germany, predominantly in the SME sector.
How does Patterno help?
Patterno HIT filters roofing tenders by roof type (pitched, flat), material, region and project size. A flat roof specialist does not see pitched roof tenders. A slate roofer in Thuringia only sees relevant projects in their region.
Patterno BID accelerates calculation: roofing bills of quantities are typically compact (50–150 items), but calculation requires precise knowledge of material and assembly costs. The AI agent prices based on stored conditions, also considering seasonal factors and regional characteristics.
Current trends
Several trends shape the roofing market: energy-efficient renovation (roof insulation as one of the most effective energy-saving measures), photovoltaic mandates (more states requiring PV on public buildings), green roofing (municipal climate adaptation strategies) and asbestos remediation (systematic replacement of asbestos-containing roof coverings from the 1960s–1980s).