Traditional standing seam roof meets innovative photovoltaics and sustainably shapes the future of our homes...

The Estonian product from the company "Roofit Solar-Energy OÜ" uses a 0.5 mm thick galvanized steel sheet, material grades S280GD to S350GD, as the base and carrier material and is coated using the patented "GreenCoat Pural BT" process.

Conventional double standing seam roofing is made of aluminum, zinc or copper and is known for its impermeability and durability, but has a relatively high expansion coefficient.

As a steel sheet is connected to the monocrystalline PV film and a 3.2 mm tempered glass panel, this lower coefficient of expansion plays a decisive role.

In an elaborate lamination process using special adhesives, different materials are processed at high temperatures with corresponding separating films to form a "composite material" that is ultimately durable; Ruukki, the steel manufacturer, gives a 50-year guarantee against rusting through; these modules have been subjected to a hail test and, in addition to all this, still generate electricity.

The installation of the active panels using the standing seam technique is an old traditional craft and really needs no further explanation, as the rules of the trade are well known among tradesmen.

With a total weight of just 16 kg/m², this building-integrated photovoltaic system is particularly interesting for existing buildings to be renovated with static problems in the substructure, which is otherwise almost identical to that of a stone roof covering, only much lighter.

Therefore, rear ventilation is important for a well-functioning PV system, which the manufacturer requires to be 5 cm and therefore the counter battens should be 50 mm and the supporting battens 30 mm.

The eaves and ridge are rear-ventilated and thus ensure the removal of the warming air, whereby a better efficiency is achieved due to the lower temperatures.

Roofit Solar has attracted a great deal of attention due to its multiple approvals for listed buildings, such as the Havelquartier in Potsdam and the National Library in Tallinn.

The solar panels from Roofit Solar offer extensive scope for creative and innovative architectural design, including façade design.