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Air cushion roof atrium Eyescan Clinic

Buitink Technology realized an ETFE air cushion roof for the atrium of Eyescan Eye Care Clinic in Utrecht. The roof consists of 5 cushions having a total surface area of about 145 m2.

Heat reflecting ETFE roof

The roof consists of 4 layers of ETFE foil (so 3 air chambers). The outer layer is heat reflecting by using a special IR blocking foil.This layer is heat reflecting.

The special IR blocking foil is transparent but blocks effectively solar heat radiation.

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 IR cut


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

Size: 145 m2 total of 5 cushions
ETFE foil, transparant and with infrared block          
Client: Eyescan Oogzorgkliniek
Architect: Architektenburo Guido Bakker
Main contractor: Bouwbedrijf J.G. Timmer BV
ETFE air cushion roof:          
Buitink Technology
Year of construction: 2018/ 2019


Soestwetering, 3543 AZ Utrecht


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