A combination of concrete paving, kerbs, benches, plants and turf areas had to come together to create a beautiful space for local residents to enjoy at Crown Place, Liverpool University.
The sub layers of this project were crucial. The root barrier and protection fleece were installed to protect the waterproof membrane below, followed by a 40mm drainage board filled with crushed gravel across the whole roof area. This allowed the permeable paving above to drain quickly and effectively.
The intensive substrate, plant species and turf were carefully selected to endure roof conditions. Shade tolerant and low maintenance vegetation was essential on this project to keep the roof looking great all year round.
The key issue Sky Garden faced was the potential risk of damaging the inspection boxes with the spider crane being used on the roof. It was feared that the initial design of the boxes could give way to the weight of the crane legs. Using initiative, Sky Garden delighted the client by designing an inspection box that could withstand the loading weight of the crane and therefore avoiding any potential roof damage or injury.