An EPDM roof that can be removed later
Today, a flat roof must be reliably watertight and able to move with the building throughout its lifespan. BossCover The Circular System combines a durable EPDM membrane with mechanical, detachable connections. This ensures that the installed components remain accessible for inspection, recovery, and potential reuse.
Removable roof structure
Detachable eaves and roof edge
For new construction and renovation
Circularity starts with connection
Technically, a material can last for years, while the building or roof structure may change sooner. If the layers are permanently bonded together, it becomes difficult to capitalize on that residual value later on. BossCover The Circular System is therefore based on a design that allows for disassembly.
Sustained Performance: Keeping Materials in Their Original Function for as Long as Possible
Modular Design: Detachable Connections Minimize Destructive Disassembly
Preserving value: Reuse takes precedence over processing into raw materials
Two roof structures, one principle
The roof surface is either loosely laid and ballasted or mechanically fastened. In both designs, the connections and system components are mechanically fastened so that they remain detachable. In the Circular Ballasted System, the membrane remains loosely laid and is ballasted. In the Circular Mechanical System, the membrane is mechanically fastened, as are the eaves and roof edge.
View the technical documentation
Detachable connections at the eaves and roof edge
With the BossCover Certefix, the EPDM membrane is mechanically clamped into the roof edge, without the need for adhesive fastening. The roof edge profile mechanically anchors the membrane to the roof edge while also allowing the connection to be detached.
Certefix mechanically clamps the membrane into the fillet
The roof edge profile secures the membrane to the roof edge
Both connections remain accessible for inspection and disassembly
Designed for Change
A building rarely remains unchanged throughout its entire lifespan. By designing the roof structure to accommodate future modifications from the outset, usable materials are not automatically lost during renovation or repurposing.
Renovation and retrofit insulation: the membrane is removed to allow access to the underlying layers
Add-on floors and expansion: the existing structure will be removed, and the materials will remain recoverable
Disassembly and subsequent use: components remain accessible individually
Circular Roofs in Practice
For its own new office, the Belgian architectural firm AST77 chose BossCover Circular System in combination with reclaimed insulation, covering 500 m² of roof. At the temporary asylum seekers’ center in Dordrecht, circularity was incorporated into the design from the outset: a 6,000 m² roof with 1,100 meters of Certefix, constructed with the intention of later dismantling and reassembly at a different location.
From EPDM Scraps to Rooftile XL
During processing and prefabrication, EPDM scrap is generated that cannot be reused as a roofing membrane. BossCover collects this clean scrap and has it processed into granules. That recycled material serves as the raw material for BossCover Rooftile XL, a durable rubber tile for flat roofs.
Walkable finish for utility areas and walkways
Suitable for use as a finish on rooftop terraces
Recycling only comes into play when reuse is no longer possible
Frequently Asked Questions About Circular Roofs
What is a circular roof?
What is the BossCover Circular System?
What is the difference between the ballasted system and the mechanical system?
Can existing EPDM be reused during a renovation?
What happens to EPDM that can no longer be reused?
Are you working on a circular roofing project?
Our project team works with you to determine the appropriate roof structure, detailing, and application of the BossCover Circular System.
Request the circular brochure