How long does a flat roof last for?
How Long Does a Flat Roof Last? A Breakdown of Roofing Membranes
When investing in a flat roof, longevity is a key consideration. The lifespan of a flat roof depends on the material used, installation quality, and maintenance. In this guide, we break down the most common flat roofing membranes—Felt, GRP, EPDM, and PVC Single-Ply—highlighting their durability and recommending the best option for long-term performance.
Felt Roofing (Bituminous Membrane)
Felt roofing has been used for decades, offering a budget-friendly solution. Typically, it consists of layers of bitumen, reinforced with fabric and finished with a protective mineral layer.
Lifespan: 10-20 years
Pros: Low-cost, widely available
Cons: Prone to cracking, requires regular maintenance, shorter lifespan than other options, Has to be installed using a flame, this causes a potential fire risk on installation.
Increased weight due to multiple layers
GRP Roofing (Fibreglass)
Glass Reinforced Plastic (GRP) roofing is a durable and lightweight option, applied as a liquid that cures into a tough, waterproof layer.
Lifespan: 20-30 years
Pros: Seamless, highly durable, resistant to weather and impact
Cons: Can be brittle over time, system can crack and split with building subsidence.
Can only be installed on good weather days with low moisture content
EPDM Roofing (Rubber Membrane)
EPDM (Ethylene Propylene Diene Monomer) is a synthetic rubber membrane known for its flexibility and resistance to UV exposure.
Lifespan: 25-30 years
Pros: UV-resistant, flexible, low maintenance
Cons: Seams can be vulnerable if not properly installed. System not aesthetically pleasing. System is glued together rather than welded
PVC Single-Ply Membranes – The Best Choice for Longevity
PVC (Polyvinyl Chloride) single-ply membranes stand out as the best option for flat roofing due to their superior lifespan, durability, and energy efficiency.
Lifespan: 35+ years
Pros:
Highly durable and resistant to weathering
Heat-welded seams for superior waterproofing and less potential of fire on install
Energy-efficient with reflective properties
Resistant UV exposure easy to clean and maintain
Lightweight
Aesthetically pleasing
Cons: Slightly higher upfront cost, but offers excellent long-term value
Why Choose PVC Single-Ply Membranes?
When considering a flat roofing solution, PVC single-ply membranes offer the best balance of longevity, durability, and performance. With a lifespan of 35 years plus years, minimal maintenance, and excellent waterproofing, PVC is a top-tier choice for commercial and residential properties alike.
At All Weather Roofing Ltd, we specialise in high-quality single-ply membrane installations, ensuring your flat roof provides long-lasting protection. Contact us today for expert advice and a free quote!