AB Ålholmhus Invests in Solartag and Green Facades
At the corner of Roskildevej and Ålholmvej in Valby, the housing cooperative AB Ålholmhus is undertaking an extensive and visionary renovation. The project includes a complete replacement of the roofs—partly with solar panels on the sloped surfaces and sedum on the flat roofs—new insulation with a climate screen made from recycled materials, the establishment of green facades, and not least a significant upgrade of the building’s sustainable profile.
The worn corrugated asbestos cement roofs are being replaced with Solartag—a Danish-designed roofing solution with integrated solar cells that combines beautiful architecture with green technology. The matte surface without glare makes the roofing solution particularly suitable for sloped roofs in dense urban areas, as the solar cells are not visible and the roof simply looks like a regular slate roof.
The Solartag on AB Ålholmhus is expected to produce a total of 83,596 kWh of green electricity per year, of which around 49,000 kWh will be used directly in the building.
At the same time, the facades are insulated with climate-friendly materials and partially clad with recycled aluminum trapezoidal sheets and green vegetation, which can help purify the air, reduce noise, enhance the building architecturally, and improve residents’ wellbeing.
“We wanted a solution that is both sustainable and beautifies the buildings. Solartag and the green facades fulfill both—plus it results in a lower electricity bill in the long term. The price difference compared to a conventional roof was surprisingly small, so the extra cost of a Solartag is recouped relatively quickly through the green electricity the roof produces,” says Ole Vinkler from the board of AB Ålholmhus.
The project is designed by A4 Architects and carried out in collaboration with Hovedstadens Bygningsentreprise A/S, HBO/Solarlightning energy consulting, and Solartag in Ishøj. The project is supported with funds from the Building Renovation Pool in Copenhagen Municipality. The renovation supports Copenhagen’s goal to become a greener and more climate-friendly city, and AB Ålholmhus is now leading by example locally, showing how aesthetics and sustainability can go hand in hand.
The exhibition was dominated by a strong focus on tech, high performance, and low cost – often without consideration for surroundings, heritage, or the environment. That’s exactly why our presence mattered. Because we take a different path.
Solartag represents a new agenda – where people, green transition, and architecture go hand in hand. Our message to the industry is clear: Solar energy shouldn’t be only about watts and price. It must also be about people, urban spaces, and architecture. Our solution is a sleek, Scandinavian solar roof – designed to respect the building’s expression, its context, and the people who live in and around it.
We are proud to help put aesthetics on the agenda in an industry that too often forgets both beauty and people. For us, solar energy is also about building beautifully, sustainably, and in harmony with the surroundings.
About AB Ålholmhus:
The housing cooperative AB Ålholmhus is centrally located in Valby at Roskildevej 150-152 and Ålholmvej 27-31. The cooperative consists of 96 apartments spread across three buildings, originally constructed in the 1950s. In 2025, the cooperative is undertaking an extensive building renovation, which includes replacing the old corrugated asbestos cement roofs with Solartag—a Danish-developed roofing solution with integrated solar cells. At the same time, the facades will be additionally insulated and clad with both recycled materials and green vegetation, and the balconies will be refurbished. The new solar roof is expected to produce 83,596 kWh of green electricity annually, much of which can be used directly by the residents of the building. The project is designed by A4 Architects and carried out in collaboration with HBO Solutions/Solarlightning energy consulting, Solartag, Hovedstadens Bygningsentreprise, and the Copenhagen Municipality’s urban renewal department.
About Solartag:
Solartag is a Danish-developed roofing solution with invisibly integrated solar cells that combine aesthetics and functionality in one. With Solartag, you get an active roof that produces electricity where it is consumed and pays for itself compared to traditional roofs. Solartag is made from hardened, silk-matte glass, ensuring a sleek matte black appearance without glare and requiring minimal maintenance. The roof panels come with a 40-year warranty as a climate shield and a 25-year performance guarantee on the solar cells. Solartag is designed in Denmark and produced in the EU, certified by Bureau Veritas (EPD), the Danish Technological Institute, and the Danish Fire Institute.
For further information, contact:
Ole Vinkler – AB Ålholmhus – aalholmhus@probo.dk
Rune Gitz-Johansen – rg@solartag.eu – +45 2682 8563