House Refurbishment Aylesbury
Re-using existing tiles on a leaking roof refurbishment
This new build property was installed with plastic slate tiles at a 15 degrees pitch. The design of the roof was very low pitched, which unfortunately led to the roof tiles leaking.
ISOLINE LOW LINE was specified to rectify the issue. The roof tiles were removed, and ISOLINE LOW LINE was fitted to the existing structure ensuring complete waterproofing. The same roof tiles were then re-installed over the ISOLINE sheets, not only saving time but also saving on the cost of purchasing new tiles.
This was the first time the Roofing Contractor, Steadfast Roofing had installed ISOLINE LOW LINE, and feedback was very positive with the installers stating "Onduline's ISOLINE LOW LINE system is easy to install and great to work with".
PROJECT DETAILS
Contractor: Steadfast Roofing
Products: ISOLINE LOW LINE
Initial Roof Installation
The project featured plastic slate replica roof tiles, a popular choice due to their lightweight and aesthetically pleasing qualities. The tiles were installed at a 15-degree pitch, which is the minimum recommended pitch for this type of tile. This specification, though suitable for many situations, eventually led to issues that required prompt attention.
In the initial stages of the construction, the plastic slate replicas were laid down, with careful attention to the 15-degree pitch. This configuration provided a cost-effective and visually appealing solution for the roof. The roof tiles replicated the classic look of slate without the weight or cost traditionally associated with natural slate.
However, as time passed, it became clear that the design, combined with the low pitch of the roof, presented complications. Roofs with pitches at the lower end of the recommended range can often face difficulties in shedding water effectively, leading to potential leaks, particularly in regions with higher rainfall or harsh weather conditions.
The Leak and Solution
Soon after the installation, the roof began to leak. This issue was identified as being a direct result of the water not being able to drain away quickly enough due to the 15-degree pitch. To resolve the situation, a more robust waterproofing solution was specified.
ISOLINE LOW LINE was chosen as the primary waterproofing sub-roof material. This product is known for its excellent waterproofing capabilities and durability, designed specifically for use under a variety of roofing systems. Once the ISOLINE LOW LINE was installed beneath the existing roof tiles, it provided an impermeable layer that ensured water would be effectively redirected away from the roofing structure, even under challenging weather conditions.
Reinstallation of Roof Tiles
After the waterproofing layer was in place, the original plastic slate replica roof tiles were reinstated over the newly fitted ISOLINE LOW LINE sub-roof. The tiles were secured back into position, ensuring that they maintained their aesthetic appeal while benefiting from the enhanced protection offered by the ISOLINE system.
With the sub-roofing in place, the risk of future leaks was significantly reduced, and the roof’s overall performance improved. The solution not only addressed the immediate issue of water infiltration but also extended the longevity and reliability of the roof, offering homeowners peace of mind.
Conclusion
This construction project in Aylesbury highlights the importance of careful roof design and material choice, particularly when working with low-pitched roofs. While plastic slate replica tiles are an attractive and cost-effective solution, their performance in low-pitch applications can sometimes lead to challenges, such as leaks. By specifying the ISOLINE LOW LINE waterproofing system, the issues were resolved efficiently, ensuring that the roof remains secure and waterproof for many years to come.
This case serves as a reminder of the importance of using a comprehensive approach when designing roofing systems, considering both the aesthetic appeal and the long-term durability of materials. With the right solutions in place, a beautiful roof can also be a reliable one, even in the face of adverse weather conditions.
Request our RIBA CPD on low pitched roofing
Our RIBA accredited CPD is available to give architects and building professionals a greater understanding of the benefits low pitched roofs and sub-roof systems can offer.
‘Understanding low pitched roofs and the benefits of sub-roof systems’ is the latest addition to Onduline’s extensive training programme and provides an overview of the importance of roof pitches and how to ensure the right pitch for a building.
