Time-tested multi-layer felt roofing that delivers reliable, long-lasting waterproof protection for flat and low-pitch roofs on domestic and commercial properties throughout Kent, London and the South East.
Built-up felt roofing remains one of the most established and dependable methods of waterproofing flat and low-pitch roofs. At Henleys Roofing, we have been installing and maintaining built-up felt systems for over 14 years, bringing expert knowledge of traditional and modern felt specifications to every project we undertake. Whether you need a new roof on a garage extension or a full re-roof on a commercial building, our experienced team will ensure a watertight finish that stands the test of time.
A built-up felt system works by bonding multiple layers of bituminous roofing felt together to form a single, robust waterproof membrane. Typically comprising two or three layers, the system starts with a perforated underlay that is loose-laid or partially bonded to the deck, followed by an intermediate layer for added strength and redundancy, and finished with a mineral-surfaced cap sheet that provides UV resistance and weather protection. This layered approach means that even if one layer is compromised, the remaining layers continue to keep the building dry.
Every built-up felt installation begins with a thorough inspection of the existing roof deck. We check for structural integrity, adequate falls for drainage, and any signs of rot or damage to the timber substrate. If the deck requires repair or replacement, we carry out all necessary carpentry work before roofing commences, ensuring a solid foundation for the felt system. We then install the layers using either hot or cold bonding methods depending on the specification, taking care around all upstands, abutments and outlets to ensure complete weather-tightness.
Our standard built-up felt installations include:
Built-up felt systems are widely used on domestic garages, home extensions, porches and dormers, as well as larger commercial and industrial buildings where a cost-effective, reliable flat roofing solution is required. The versatility of the system means it can be tailored to suit virtually any flat roof configuration, and with proper installation and maintenance it will typically provide 20 years or more of dependable service.
For projects where fire safety is a concern, we offer fire-rated built-up felt specifications that comply with current Building Regulations. These systems use specially formulated felts and bonding methods that have been independently tested and certified to achieve the required fire rating. This is particularly important on commercial properties, buildings close to boundaries, and any project where the local authority or building control requires evidence of fire performance. Our team will advise you on the most appropriate specification for your particular project and ensure full compliance with all relevant standards.
Two or three bonded layers of roofing felt create a robust, redundant waterproof membrane that guards against leaks and weather damage for decades.
Certified fire-rated specifications available to meet Building Regulations, giving you peace of mind on commercial and boundary-adjacent projects.
A time-tested roofing method trusted on thousands of properties across the UK, offering reliable waterproofing with a typical lifespan of 20 years or more.
Contact us today for a free, no-obligation quote on your built-up felt roofing project.
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