For its headquarters at Karl-Wiechert-Allee 60C, 30625 Hannover, Germany, Abfallwirtschaft Region Hannover (aha) is planning to build a new 4-storey social and office building with workshops (abbreviation: KWA-Z04) on its own premises.

In the new building complex, a social area, an administrative area for the employees of the building management, the construction planning and the EDP, as well as various meeting and training rooms will be created. In the adjoining single-storey central section, the technical rooms supplying the entire complex as well as two workshops are planned. The hall construction will receive a set solid core for further workshops. Open and closed storage areas are provided on the workshops (1st floor workshops).

The subject of this award procedure is the services of the roof waterproofing trade / 300.321:

1. Administration

- Roof waterproofing of the administration on reinforced concrete slab or for technical floor on trapezoidal sheet metal, approx. 620 sqm, intermediate building on reinforced concrete slab approx. 380 sqm

- Vapour barrier as elastomer bitumen membrane

- Thermal and slope insulation MiWo

- Roof waterproofing 1st layer bitumen welded membrane

- Roof waterproofing, top layer, bitumen welded membrane

- Insulation and waterproofing attic

- Inspektionswartungswege 60 m

- SHEV skylight 2 pieces

- Plumbing work administration

- Roof drainage as attic gully, emergency drainage

- Temporary roof drainage, 68 m

- Attic covers made of aluminum sheet 175 m

- rope safety system

- Sicherheitsgeschirr

2. Roof waterproofing of the workshop on trapezoidal sheet DN 5%, approx. 1,670 sqm

- Vapour barrier as elastomer bitumen membrane

- Thermal and slope insulation MiWo mech. fortified

- Roof waterproofing 1st layer FPO roofing membrane mech. fortified

- SHEV skylight 1 piece, 3 pieces ventilation roof hoods

- Continuous line 18.0 x 2.0 m

3. Plumbing work

- Roof drainage as gutter

- Temporary roof drainage, 68 m