In April 2020, we implemented a 385m2 Sarnafil Single Ply membrane roofing solution on a stunning new build home, located on the edge of a country park. The homeowner was looking for a modern, high-performance roofing solution to complete his new home, which included its own gymnasium, a distinct wrap-around roof, and stunning red cedar, exterior cladding.
It’s location meant that the homeowner wanted to ensure the build fitted in with its surroundings, as well as the house scale and height appropriate to its location. Maintaining the landscape and scenic quality of the surrounding was important.
The main roof installation was completed in stages, in which our team installed the different roof levels as and when works were completed. The building outline is defined by its sectional, Sarnafil protected wrap around the roof, with an extended overhang that compliments the super-sharp lines of the building design while retaining the integrity of the structure. The overhang also helps to protect the cladding, windows, and doors below from weather damage, while still allowing ambient sunlight to enter the home.
The roof installation consisted of a warm roof with a plywood deck and a Sarnavap 500E Polyethylene air and vapor control layer. The Insulation was SarnaTherm polyisocyanurate rigid foam, providing zero Ozone Depletion Potential (ODP) and low Global Warming Potential (GWP) to achieve the required ‘U’ value. The insulation is in accordance with BS EN 13165 and the SPRA (Single Ply Roofing Association) Design Guide.
The Sarnafil lead grey fleece-backed single ply roofing membrane was adhered to the substrate and hot air welded. Sarnafil reinforced membranes are manufactured at a state-of-the-art manufacturing plant in Switzerland to ISO 9001 (Quality) and 14001 (Environmental) standards. Manufactured with a dirt-repellent lacquered top surface and treated with fire retardants, it provides a dimensionally stable and vapor permeable waterproof membrane, certified by the BBA as having a ‘life expectancy in excess of 40 years.
Upstands for the roof skylights were created using the Sarnafil membrane, allowing the skylights to fit perfectly into place. The final touches included a Sarnafil lead grey decor profiles to give the final look and feel of a traditional metal roof.
Once the roofing installation was completed a Sarnafil Field Technician carried out a 34-point final inspection, ensuring that the work had been carried out in accordance with the specification and that it meets the necessary standards for the issue of the Sarnafil Product guarantee.
Adam Alexander, Roofing Manager, De Rosa Installations said: “This has been a very exciting project for us. The roof design plays such an important part in this self-build, effectively linking all areas of the house together. The project was rolled out in stages which allowed us to work on other projects at the same time.
It was also interesting to see the house build evolve over time to the stunning family home it has become. We had a great relationship with both the homeowner and main contractor which made the whole project a pleasure to work on and, of course, throughout we had the support of the Sarnafil technical teams when it was needed”.