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Roof insulation and waterproofing works – flat-roof thermal retrofit 2026 Tender
Original: Roof insulation work – Dachabdichtungs- und Dachbegrünungsarbeiten
In context
This is a contract notice published by a government body covering construction and works. Bids are invited through an open procedure. Delivery covers Germany (Europe). It is classified under Energy Efficiency, Sustainable Buildings and Engineering and Infrastructure against the sustainability taxonomy rather than matched on keywords.
This tender procures comprehensive roof insulation, waterproofing, and green-roof works for a Munich municipal building, including thermal insulation layers, bituminous and liquid-plastic membranes, copper and stainless-steel flashings, and intensive roof greening. Bidders must be specialized roofing contractors with expertise in flat-roof systems, thermal insulation, waterproofing membranes, and extensive green-roof installation.
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About this tender
Roof insulation, waterproofing, and greening work on two building sections (Unterer Anger 11-12 and Rückgebäude) in Munich. Scope includes provisional sealing of attikas, bitumen roof waterproofing, substrate preparation (drying, cleaning, grit-blasting, measurements, primer application), compensation layers with expanded glass granulate/cement mortar, multi-layer thermal insulation (PUR/PIR/CG materials at various thicknesses 90-300mm), vapor barriers, liquid plastic coatings, metal flashings (copper, stainless steel, aluminum), drainage systems (gutters, downspouts, outlets), pigeon deterrents, and intensive/extensive roof greening with landscaping elements. Total scope approximately 217-695 m² per section plus extensive linear and item-based components.
Lots
- Lot 1: Unterer Anger 11-12 - Roof Insulation and Waterproofing
Provisional attica sealing (~37m), bitumen roof waterproofing, substrate preparation (~217 m²), compensation layers, multi-layer thermal insulation (PUR/PIR/CG D210mm and D90mm, ~181 m² and ~32 m²), linear insulation for attica (~125m), wooden composite boards (~37m), aluminum clamping rails (~62m), vapor barriers (~217 m²), two-layer roof waterproofing PYE (~217 m²), liquid plastic coating (~50m), stainless steel attica outlets/emergency outlets (6x), copper spill pipes (3x), copper downspouts DN100 (~47m), copper base flashings (~84m), copper attica caps (~37m), stainless steel sheet metal (~93m), stainless steel fittings (9x), pigeon deterrents (~37m), cooler space (~13 m²), intensive roof greening (~98 m²), drainage channels (~104m), provisional drainage for 6 outlets.
- Lot 2: Rückgebäude (Rear Building) - Roof Insulation and Waterproofing
Substrate preparation (~695 m²), compensation layers (~69 m²), stainless steel sheet metal (~350m), steel angle profiles (~510kg), aluminum attica caps (~15m), stainless steel inserts (9 total), damping wedges (~52m), multi-layer thermal insulation (PUR/PIR/CG D240mm ~139 m², D240mm ~526 m², and D300mm strips ~400m), wooden particle boards (~167m), aluminum clamping rails (~80m), vapor barriers (55 m² G200S4+Al, 625 m² self-adhesive aluminum composite), two-layer roof waterproofing PYE (~43 m²), one-layer FPO waterproofing (~621 m²), liquid plastic coating (~55m), stainless steel attica outlets (4x), drainage channels in stainless steel (~12m), protective rubber granulate mat and separating layer (~695 m² each), terrace paving (~43 m²), extensive roof greening (~610 m²), provisional drainage for 10 outlets.
Key requirements
- ✓Thermal insulation retrofit: PUR/PIR/CG layers up to 220 mm depth across ~217–350 m² roof areas
- ✓Bituminous and liquid-plastic waterproofing membranes (2-layer PYE-KTP-KSP, FLK 2 mm) with full substrate preparation (cleaning, haftgrundierung, measurements)
- ✓Extensive green-roof installation (~98 m²) with drainage, terrace pavers, and edging; copper and stainless-steel flashings, gutters, and downpipes (DN 100 copper, ~47 m)
- ✓Attica and wall-junction detailing, bird-deterrent systems, temporary drainage provisioning for 6 roof outlets
Relevant sectors
About this sector
Energy efficiency funding covers building retrofits, industrial process upgrades, heat recovery, efficient equipment and demand reduction. It arrives as grants for audits and capital works, as support schemes run by agencies and utilities or as public tenders for retrofit and energy services. Applicants usually need a baseline of current energy use and a measured saving.
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