Membrane roofs with K2: Safe and flexible

01 September 2025

Membrane roofs

On a membrane roof, sheets made of PVC, EPDM, or TPO ensure reliable sealing and effectively protect the building from weather conditions. These lightweight, flexible, and weather-resistant roofing systems offer a cost-effective and durable solution. Thanks to their adaptability, they are well-suited for complex or curved roof surfaces — even in combination with photovoltaic systems.

Ballast

The Dome 6 systems are aerodynamically designed and require only minimal ballast, making them ideal for installation on membrane roofs. When roof load capacity is limited, additional options for ballast reduction are available — all of which can be quickly and easily planned in K2 Base.

  • Using the D-Dome instead of the S-Dome System
  • Using the LS System which is clamped on the long side of the module
  • Combining ballast and roof anchors or complete switch to roof anchors
Overview of the Dome 6 variants

Insulation

K2 Base offers the option to enter the maximum permissible pressure on the thermal insulation. If this threshold is exceeded, an additional number of Mat S protection mats can be automatically added, enabling a more even distribution of the load. An additional solution is the K2 LoadSolver: thanks to its widened contact surface, it ensures particularly effective load distribution on the insulation.

More on insulation

Roof anchors

For roofs with low load-bearing capacity or a roof pitch of 3° or more, mechanical fastening of the mounting system is required.

K2 Base provides planning options with roof anchors from various manufacturers such as Sika, Solmont, and CW Lundberg. The respective load-bearing capacities of the anchors are automatically taken into account. Additionally, users can enter custom anchor values. Connection to the K2 rails is conveniently made using the Dome FixPro component.

Plan roof anchors in K2 Base now

Cooperation with Sika

Enhanced safety through tailored solutions for various applications:

  1. Fixed anchoring on flat roofs: Easily design the SikaRoof® Anchor statically in the K2 Base planning tool
  2. Additional elevation on flat roofs: With Dome 6 Lifted LS on SikaRoof® Anchor
  3. New for pitched roofs: SingleRail IFP on SikaRoof® Anchor – ideal for membrane and bitumen roofs
More

K2 Dome 6 RidgeConnector

In cases where the use of roof anchors is not possible or not desired, there is now a cost-effective alternative: the K2 Dome 6 RidgeConnector.
It connects module blocks simply and efficiently across the roof ridge. The roof anchor can be omitted – saving material and costs while also eliminating an entire work step on the roof.

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We’ve got the perfect solution for your membrane roof too!

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