Safe and energy-efficient roof access for Wisselspoor Utrecht

For the sustainable residential development Wisselspoor in Utrecht, Staka supplied several TopAccess roof access hatches. This mixed-use urban district blends industrial heritage with modern architecture. To ensure safe and easy access to rooftop technical installations, contractor Van Wijnen selected Staka’s reliable, fully integrated roof access solutions.
The installed roof hatches – models TOP147 and TOP99 – were supplied with extension ladders, and one unit with a scissor stair. This combination ensures both flexibility and safety during maintenance. With a thermal insulation value of U= 0.21 W/m²K, the TopAccess hatches also contribute to the energy performance of the buildings.

Durable and high-quality roof access hatch

Designed for outstanding insulation and longevity, the TopAccess roof hatches are ideal for sustainable building projects. Their thermally broken construction and premium stainless steel housing ensure excellent thermal performance. KOMO and TÜV certifications provide added peace of mind and long-term reliability.

Extension ladder combination: flexible and practical

Several of the hatches were combined with an extension ladder – a lightweight aluminium solution suitable for floor heights up to 9 metres. The ladder is easy to use and can be safely stored using the Staka SafeStepSystem. A cost-effective and secure option for maintenance access.

Scissor stair combination: space-saving and user-friendly

One of the hatches was equipped with a scissor stair, ideal for areas with limited ceiling height or where aesthetics are important. The compact design folds neatly into the ceiling when not in use, maintaining a clean interior finish. The stair allows quick, safe, and ergonomic roof access in accordance with EN 14975.

Project information

Project: Residential development Wisselspoor
Location: Utrecht, the Netherlands
Client: Van Wijnen
Product: TopAccess Roof Access Hatches
Supplied units:

• 5x TOP147 with extension ladder
• 1x TOP147 with scissor stair
• 1x TOP99 with extension ladder

Specifications:

• Insulation value: U= 0.21 W/m²K (EN-ISO10077-2)
• Rc-value: 7.22 m²·K/W
• Sound insulation: 23 dB
• Wind load: 2400 Pa
• Water tightness: 750 Pa
• Snow load: 950 N/m²
• Upstand height: 330 mm
• Material: Stainless steel (AISI 304)
• Gas springs with locking mechanism
• KOMO and TÜV certified

The choice for Staka underlines the sustainable and future-proof character of Wisselspoor. With a lifespan of several decades and robust certified construction, these hatches offer a reliable solution for any commercial or residential roof access project.