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ETFE air cushion roof lobby Bisonspoor Maarssen

Buitink Technology realized an ETFE air cushion roof for the new bussiness lobby's dome in shopping centre Bisonspoor in Maarssen. This roof consists of 5 ETFE air cushions, with a total surface area of about 470 m².

Unique ETFE roof design

Its unique design and shape being suggestive of dolfins and whales.

Pictures by: Harry Noback Fotografie

Heat reflecting roof

The roof is consists of 4 layers of ETFE foil (3 air chambers). The outer layer is heat reflecting by using a special IR blocking foil. This foil is light transparent but blocks effectively the heat from sun shine (see below graph ''T IR-cut'').

Below graph shows the relation between Transmission and Wavelength of light for standard foil (''T Standard natural") and IR blocking foil (''T IR-cut'').

Warmtewerend ETFE dak

  3 layer
ETFE clear
1 layer IR-cut /
2 layer ETFE clear
Direct energy transmission: 0,74 0,36
Radiation reflectance: 0,22 0,11
Light transmission grade: 0,71 0,44
Light reflection grade: 0,24 0,11
UV- transmission grade: 0,45 0,19
Solar heat gain coeffincient: 0,75 0,41

Project data air cushion roof

Size: 470 m² total for 5 cushions
Material: ETFE foil, transparant including infrarood block        
Client: Wintertrust
Architect: Op ten Noort Blijdenstein
Main contractor: Bouwbedrijf aan de Stegge Twello BV
ETFE air cushion roof:      
Buitink Technology
Location: Bisonspoor 2017, 3605 LB, Maarssen


Bisonspoor 2277, Maarssen


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