In Zoetermeer, HBM Dakbedekkingen of Barendrecht renovated the roofs of two connected buildings, those of gewoonfietsen.nl and a fitness club. The roofing was in very poor condition and needed to be completely replaced or overlayed.
Nick van Loenen, Director of HBM: “At the request of Mrs Konijn, the owner of the building, a circular concept was chosen for the roof renovation. Her wish was to install a roof system that was manufactured as much as possible from recycled raw materials and that could also be recycled or reused in the future.”
After consulting with IKO, the decision was made to install insulation and a new waterproofing layer on top of the existing roof. The new layers consist exclusively of circular products:
- IKO enertherm Atelia PIR insulation
- IKO base 460P60 EU Atelia
- IKO powergum 4 AW/F Atelia (white cap sheet)

Project data
- Location: Industrieweg 23-25, 2712 LA Zoetermeer
- IKO account manager: Marc de Reus
- New build / renovation: Renovation
- Client: Van der Kooij Bouwmanagement
- Roofing contractor: HBM Barendrecht
- Surface: 350 m² and 180 m²
- Number of roof surfaces: 2
- Data project: Sep. 2024 - Oct. 2024
Products used IKO atelia
- Ballast: n/a
- Cap sheet: IKO powergum 4 AW/F Atelia 5.0
- Underlay: IKO base 460P60 EU Atelia 12.0
- Insulation: Enertherm ATELIA 1.2×1.0 76mm
- Vapour barrier: Existing roof covering
- Substructure: Steel roof