Passive Houses/ Warm Roofing
The growth of the sustainability movement has seen the increase in architectural specification of specialised materials to enhance the thermal efficiency of a building. At Aquaproofing, we’ve gained a reputation as warm roof installation specialists over the last ten years for both new roofs and the overlaying of existing ones.
A warm roof insulates a building from the outside-in, as opposed to the use of conventional glass wool stuffed inside the ceiling cavity. This improves a building’s thermal efficiency via the installation of rigid foam insulation panels (called Polyiso) on top of the roof substrate which is either concrete, plywood, or metal tray.
We install to the exact specification of the architectural plans where applicable, or in the case of some warm roof overlays that don’t involve such drawings, we establish the building owners’ thermal efficiency requirements (the R-value) and work with the materials supplier to specify the appropriate polyiso board thickness to suit.
Once the insulation layer is installed, its surface is waterproofed with a membrane system in the same way that a traditional membrane roof would be. So, our methodology and mantras remain the same, especially when it comes to ensuring that the foam insulation surface is installed as uniformly flat as possible otherwise imperfections will telegraph through the membrane surface.
We’ve also been involved in some tasteful roof garden projects. Like any of the above-mentioned membrane installations, the manufacturer’s complete ‘system’ must be installed. A roof garden (or a green roof) is made up of a series of components such as proprietary root barriers, drainage boards and drainage protection systems. The manufacturers we work with also have established partnerships with suppliers of specialised leak detection systems, high drainage soil formulas, roof garden-friendly plants and watering systems.
Read about a warm roof job we completed recently on our Case Studies page.
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