18/09/2026
From a structural metal deck to a completed biosolar green roof, thereโs a lot more happening above a building than you might think. ๐ทโโ๏ธ
Following on from our previous video about structural floor and roof systems, this project shows how the metal deck was developed into a complete waterproofed, insulated and functional roof.
The build-up starts with OSB board to create a rigid surface, followed by the waterproofing system. Insulation is then installed to the required thickness to help the building achieve its thermal performance requirements, with further membrane layers providing protection and a durable finished surface.
Careful detailing is particularly important around penetrations, outlets and perimeter areas. Tapered insulation is also used to create the necessary falls, helping direct rainwater towards the drainage outlets.
But this roof goes even further.
๐ฑ A green roof system provides planting and habitat that contributes towards the project's biodiversity requirements.
โ๏ธ Solar PV panels form part of the strategy for delivering a building designed to achieve net-zero carbon in operation.
๐ถ Safe access routes are incorporated so the roof and its equipment can be inspected and maintained safely.
This represents around six months of work, but one of the early advantages of the system was being able to establish the waterproofing layer and make the building watertight, allowing internal works to progress.
A great example of how modern roof design brings together structure, waterproofing, thermal performance, drainage, biodiversity, renewable energy and safe maintenance within one coordinated system.