There comes a point when patch repairs on an ageing flat roof become a false economy — when the underlying membrane, insulation, and sometimes the decking itself have deteriorated beyond viable repair. At Mr Roofer, we provide complete flat roof replacement across Cumbria, stripping the failed system back to structure and installing modern coverings that are engineered to last 25 to 50 years in our demanding climate. From domestic garages and extensions in Barrow and Kendal to commercial premises in Workington and Penrith, we deliver permanent flat roof solutions across the county.
Several indicators suggest flat roof replacement rather than further repair: multiple leak points appearing in different locations, widespread blistering or cracking of the membrane, significant ponding water that won't drain, sagging or soft spots suggesting timber decay beneath, and rising heating costs indicating failed or absent insulation. If your existing flat roof is more than 15 years old and showing two or more of these symptoms, replacement with a modern system is almost always more cost-effective than continued repairs. Our flat roof specialists provide honest assessments — we never recommend replacement when repair will do the job properly.
Every flat roof replacement follows a structured process. We begin with a thorough survey assessing the existing covering, insulation, decking condition, and drainage. The old covering is stripped completely, allowing full inspection of the timber structure beneath. Rotten or weakened timbers are replaced, new marine-grade plywood decking is laid where needed, and PIR insulation is installed to current Building Regulation standards with tapered sections creating positive drainage falls. The new membrane — GRP fibreglass, EPDM rubber, or high-performance modified bitumen felt — is then installed with full upstand details, perimeter trims, and drainage connections.
Modern flat roof systems are dramatically superior to the materials they replace. Where traditional felt lasted 10 to 15 years with regular maintenance, GRP fibreglass carries a 25-year guarantee and typically lasts 30-plus years with zero maintenance. EPDM rubber has a proven track record exceeding 40 years globally. Both systems eliminate joints — the primary failure point on older flat roofs. Combined with proper insulation, a replacement flat roof also transforms your property's energy performance, reducing heating costs and eliminating the ceiling condensation problems associated with uninsulated flat roofs.
We offer three principal flat roof replacement systems, each selected for its proven performance in Cumbria's challenging climate. The right choice depends on the roof size, usage requirements, budget, and whether the property is domestic or commercial.
GRP fibreglass is our top recommendation for domestic flat roof replacement. BBA-certified resins from Polyroof, Topseal, and Cure It create a rigid, completely seamless membrane bonded directly to the deck. Zero joints means zero failure points — critical in Cumbria's high-rainfall environment. GRP is UV-stable, fire-resistant, and can be walked on safely. It carries a minimum 25-year manufacturer guarantee.
Firestone RubberGard EPDM provides the ideal solution for larger flat roofs. Available in single sheets up to 15 metres wide, it covers most roofs without any on-site joints. The synthetic rubber compound has been proven in service globally for over 50 years, remaining flexible to minus 45 degrees and resisting UV, ozone, and salt exposure. EPDM is our primary recommendation for commercial properties.
High-performance torch-on modified bitumen membranes provide a cost-effective replacement option. SBS-modified bitumen is dramatically tougher and more flexible than traditional felt, with a lifespan of 20 to 25 years. This system is ideal where budget constraints make GRP or EPDM impractical, but performance well above traditional felt is still required.
Beneath every membrane, we install Kingspan or Celotex PIR insulation to achieve current Building Regulation U-values, with tapered sections creating positive drainage. Marine-grade plywood decking provides a moisture-resistant structural base. Vapour barriers prevent condensation, and all fixings are stainless steel rated for permanent exposure in Cumbria's wet climate.
We provide flat roof replacement services across the entire county — Barrow, Kendal, Penrith, Whitehaven, Workington, Windermere, Keswick, Cockermouth, Ulverston, and every town and village in between. Our local teams ensure fast service delivery and ongoing support wherever you are in Cumbria.
Flat roof replacement connects with our wider services including flat roof repairs, insulation upgrades, guttering, and flat-to-pitched conversions. We assess each project individually and recommend the most cost-effective solution for your specific property and situation.
Every replacement comes with comprehensive guarantees and is completed by experienced, local tradesmen.
If your flat roof is past repair, contact Mr Roofer for a free assessment and detailed replacement quotation. We'll survey your existing roof, assess timber condition, recommend the most appropriate system, and provide a clear written price — with no hidden costs, no obligation, and no pressure to proceed.
We replace flat roofs across Cumbria using GRP fibreglass, EPDM rubber, and high-performance felt. Every installation includes insulation to current Building Regulations, vapour barriers, and manufacturer-backed guarantees for your complete peace of mind.
Call us now or complete the contact form to arrange your free flat roof survey.
Choose which cookies you are happy for us to use. You can change your mind at any time from the Cookie settings button.
Needed for the website to work and to keep it secure, for example remembering your cookie choices, keeping a basket or booking together and protecting forms from spam. These are always on.
Remember choices you make, such as how a list is displayed, so the site works the way you prefer.
Help us understand how visitors use the website so we can improve it.
Used by third-party services such as maps, videos and social media, which may track you across other websites.