Fibreglass (GRP) vs. EPDM: Which Flat Roof Is Best for Your Lincolnshire Home?

When it comes to replacing or installing a flat roof, homeowners are often faced with one key question: Should I choose GRP fibreglass or EPDM rubber roofing? Both are popular flat roofing systems across Lincolnshire and the UK, but they differ in key areas like cost, durability, installation, and overall performance.

In this guide, we’ll break down the pros and cons of both GRP (Glass Reinforced Plastic) and EPDM (Ethylene Propylene Diene Monomer) so you can make an informed decision based on your home, budget, and long-term goals.

Quick Comparison Table

‍What Is GRP Fibreglass Roofing?

GRP (Glass Reinforced Plastic) is a composite material made of polyester resin and glass fibres, applied in layers to form a rigid, seamless, and weatherproof surface.

Advantages of GRP Roofing:

• Sleek Finish: Clean, modern look that adds kerb appeal.
  
• Seamless Waterproofing: No joins means fewer leak risks.
  
• High Durability: Resistant to foot traffic, weather, and impact.
  
• Great for Smaller Roofs: Especially ideal for extensions, garages, and dormers.
  

Considerations:

• More complex installation: Requires dry weather and experienced installers.
  
• More expensive than EPDM in some cases.
  
• Not ideal for very large roofs due to expansion movement.
  

What Is EPDM Roofing?

EPDM (Ethylene Propylene Diene Monomer) is a single-ply synthetic rubber membrane, typically applied in large sheets, adhered to the roof deck.

Advantages of EPDM Roofing:

• Flexible & Weatherproof: Handles expansion, contraction, and extreme temperatures well.
  
• Fast to Install: Fewer materials and steps = faster turnaround.
  
• Cost-Effective: Budget-friendly without compromising durability.
  
• Great for Large Flat Roofs: Ideal for commercial buildings, warehouses, and wide extensions.

Considerations:

• May require joins for larger roofs, which can weaken over time if not sealed correctly.
  
• Less visually appealing than fibreglass.
  
• Can be vulnerable to punctures (e.g. from dropped tools or sharp debris).

Lincolnshire Weather & Flat Roof Performance

Here in Lincolnshire, flat roofs face cold, wet winters and warm, dry summers - meaning UV resistance, weather durability, and drainage are key.

• GRP is highly resistant to water pooling and UV exposure.
  
• EPDM performs well in temperature fluctuations due to its flexibility.
  

Both options perform reliably in this climate - the right choice often comes down to the shape, size, and intended use of your roof.

GRP vs EPDM Roofing Costs (Lincolnshire Pricing)

Prices will vary by roof size and complexity, but here’s a rough idea for a 20m² flat roof:

• EPDM: £1,200–£1,800
  
• GRP: £1,600–£2,400
  

Tip: Always compare quotes from trusted local installers with insurance-backed guarantees.

Which Flat Roofing System Is Right for You?

Still unsure? At Advanced Roofing, we provide free roof surveys and tailored advice to help you choose the system that best suits your property.

Final Thoughts: GRP vs. EPDM

Both GRP fibreglass and EPDM rubber roofing are excellent flat roof materials with their own strengths. The best choice comes down to your roof’s size, budget, and how much you care about aesthetics versus cost.

Serving Lincolnshire homeowners, our team specialises in both GRP and EPDM installations. We offer:

• Competitive quotes
  
• Fully trained installers
  
• Insurance-backed guarantees

Ready to Replace or Upgrade Your Flat Roof?

Get in touch with Advanced Roofing today for a free no-obligation quote and expert advice.

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