In today’s world replacing a failing roof covering on a building can lead to so much more when the emphasis broadens to embrace sustainability and the environment.

Focusing on how the roof can perform in addition to waterproofing the building will extend the opportunities for the construction and uplift the value it brings to the building owner.

Retrofitting a simple extensive green roof or a solar PV array is possible on roof deck constructions that can support the imposed loads.  A structural engineer will be engaged to confirm suitability for each project and roof area.

Creating a sustainable environment

Retrofitting a green roof brings back a piece of nature and the roof space can be vegetated with low-maintenance plants for a simple solution. A BauderEXTENSIVE green roof combines the finished planting scheme and all its supportive components with a secure waterproofing system to give you consistently the best results.

An extensive green roof, because of it's lightweight nature, can generally be retrofitted onto a flat roof without additional support to the roof deck, and suitability will be confirmed for your building by a structural engineer.

Extensive green roofs

Low maintenance, lightweight, simple systems with no general access.

Extensive green roofs have thin layers of substrate to keep depth and weight to a minimum. They are delivered for a variety of reasons, the most popular being for biodiversity and meeting latest legislation drivers.

Retrofitting a photovoltaic array creates a solar roof that produces electricity for the building’s use, and brings all the benefits of low-maintenance renewable energy generation to your project.

The primary consideration is to the additional weight loading and wind uplift factors that the PV array will impose and the capacity of the building’s structure to support the new provision.

BauderSOLAR F PV system

The most lightweight system available in the market (9-12.5 kg/m²), making it highly suitable for retrofit applications - where weight loadings are often a deciding factor on whether adding PV to an existing building is feasible. The integrity of the current roof covering is also completely upheld during the installation, as the Bauder system is installed using a unique penetration free fixing method. Moreover, the low-profile modules are set at a 12° angle, ensuring they are unobtrusive and making it easier to overcome planning issues.

A very real challenge

A common problem across the industry is that photovoltaic systems are often installed on roofs that have an old waterproofing membrane or thermal insulation that does not comply with the latest energy-saving regulations. In overall energy terms, such a combination does not work: on the one hand, energy is gained through the photovoltaic system, while on the other hand, the potential energy saving is cancelled out by the lack of proper thermal insulation.