For flat roofing across the UK, single ply roofing systems are incredibly popular. These are roofing buildups that combine an Air and Vapour Control Layer (AVCL), with appropriate insulation, all covered by a single layer synthetic membrane. This type of system can offer durability, adaptability, and effective weatherproofing. But how does single ply roofing withstand UK storms? And how resilient will your roofing system be?
So how does single ply roofing withstand UK storms?
Single ply roofing is designed specifically to withstand all weather conditions, including storms. But how? Well this comes down to three different factors:
- Wind load calculations
- Weather resistant materials
- Installation type
Wind load calculations for single ply roofing to withstand UK storms
One of the most important factors for ensuring that your roofing system will withstand and endure the worst of the stormy weather is the wind load calculation. These calculations are guided by British Standards, particularly BS EN 1991-1-4, which focuses on how the action of the wind affects structures.
Wind load depends on a wide range of factors, including the building’s height, location, and surrounding environment, as well as the size and shape of the roof. A professional roofing team, like ours here at Enviroply Roofing, will conduct wind load calculations to determine the pressure exerted on different parts of the roof, under various wind conditions. By making these calculations, we will be able to establish the most effective roofing system, build up type and attachment methods and materials, to ensure that your new single ply roof will be able to effectively withstand high wind speeds.
Weather resistant materials in single ply roofing
Another reason why single ply roofing can often withstand stormy conditions in the UK is the choice and use of weather resistant materials. Some of the most common materials for single ply membranes include thermoplastic polyolefin (TPO), polyvinyl chloride (PVC), and ethylene propylene diene monomer (EPDM). Each of these materials offer unique and highly effective properties that make them the perfect choice for withstanding UK storms, including:
- PVC (Polyvinyl Chloride)- Renown for its excellent durability, PVC is resistant to UV rays, fire, and high winds, making it ideal for areas exposed to extreme weather. Its flexibility also helps it withstand thermal expansion and contraction caused by temperature fluctuations.
- TPO (Thermoplastic Polyolefin)- TPO membranes are lightweight, flexible, and resistant to ultraviolet radiation, ozone, and chemical exposure. Its durability and cost-effectiveness have made TPO a popular choice, especially in regions with both high sun exposure and rain.
- EPDM (Ethylene Propylene Diene Monomer)- This rubber based material is particularly resistant to extreme temperatures and UV radiation. EPDM membranes are highly durable and can withstand the wear of harsh weather, including wind and heavy rainfall.
Installation systems for single ply roofing to withstand UK storms
Finally, in order for any single ply roofing system to withstand UK storms, it’s important that these are installed correctly, in accordance with the wind load calculations, and the environmental factors, to ensure full security. Fully adhered and mechanically fixed installation systems are both used to good effect for weather proofing flat roof buildings.
In fully adhered systems, the membrane is bonded directly to the roof substrate using a strong adhesive. This approach offers a smooth, continuous surface that reduces the risk of wind uplift, as there are no exposed fasteners. These can be particularly effective in areas with high winds. because they provide an even distribution of forces across the membrane.
Mechanically fixed systems secure the membrane to the roof deck with screws and fasteners, usually along the seams. This method allows for quick installation and is also effective for roofs where the substrate isn’t suitable for adhesives. However, mechanically fixed systems must be carefully designed to withstand wind uplift, as the membrane is exposed to direct forces at the fasteners. In high wind areas, like coast or valley regions, fasteners are spaced closer together, and additional anchors may be used to ensure stability.
For professional installation of your single ply roofing system, why not get in touch with the experts today, here at Enviroply Roofing?