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Fibreglass roofing — also known as GRP (glass-reinforced plastic) roofing — is one of the most popular choices for flat roofs. It’s durable, offers a seamless finish, and has a long lifespan.

If you’re planning a new roof installation or upgrading an ageing flat roof, search for fibreglass roofing installers in Western Isles with Checkatrade for a commitment to quality and a job done right.

What is fibreglass roofing installation?

Fibreglass roofing installation involves layering glass fibre matting with a specialist resin and topcoat to create a solid, waterproof surface.

Because it’s installed as a continuous layer with no joints, it’s highly resistant to leaks and provides a smooth, modern finish.

This makes fibreglass roofing a strong choice for:

• Home extensions
• Garages
• Outbuildings
• Balconies
• Dormer roofs
• Garden rooms and offices

Its combination of strength, versatility, and low maintenance is a major reason it’s widely used across the UK.

How much does fibreglass roofing installation cost?

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Our guide to fibreglass roofing costs has more detailed information.

Fibreglass roofing vs alternatives

Fibreglass (GRP) is often compared with EPDM and felt roofing. Here’s how they differ:

Fibreglass (GRP) roofing

• Extremely durable
• Low maintenance
• Seamless, joint-free finish
• Highly resistant to cracks and water
• UV resistant
• A modern, aesthetically clean appearance
• Hard-wearing enough to walk on

EPDM roofing (rubber roofing)

• Often cheaper
• Flexible and fast to install
• Good for uneven surfaces

Felt roofing

• Usually the most affordable
• Suitable for small projects
• Shorter lifespan compared to GRP

If you’re aiming for longevity and reliable waterproofing, fibreglass roofing is typically the premium option.

How is a fibreglass roof installed?

Here's a brief overview of what to expect during your fibreglass roof installation:

1. The surface is prepared, ensuring it’s flat, clean and in good condition
2. OSB boards are laid at a 90 degree angle to your roof rafters
3. Fibreglass edging trims are installed and matting cut to size
4. The resin and catalyst are applied
5. Finally, a topcoat is applied to the fibreglass

How long does fibreglass roofing last?

A properly installed fibreglass roof can last 25–30+ years, sometimes longer with proper care. Because it’s applied in layers, it’s less prone to damage than traditional felt.

Maintenance of fibreglass roofing

Fibreglass roofs require very little upkeep compared to other flat roof types. To keep it in top condition:

• Clear off debris once or twice a year
• Check for hairline cracks or topcoat wear
• Keep surrounding gutters clear
• Avoid dragging heavy items across the surface

If you notice significant weathering or surface peeling, a fibreglass roofing contractor can re-topcoat the roof to refresh its protection.

What should be included in your quote?

When comparing quotes from fibreglass roofing installation services in Western Isles, ensure the following details are covered:

• Full breakdown of materials (matting, resin, topcoat, trims)
• Preparation work and OSB boarding
• Edge trims and finishing details
• Waste disposal
• Scaffolding or access equipment if required
• Guarantee length and what it covers

A transparent, detailed quote helps you compare services fairly and ensures you know exactly what you’re paying for.

Tips for hiring a fibreglass roofing installer in your area

Before hiring a fibreglass roofing installer near you, follow these steps to ensure you hire right:

• Read reviews on Checkatrade to see feedback from real customers
• Check services offered, e.g., GRP roofing, flat roof installation, balcony roofing
• Compare several quotes to ensure you receive a fair and competitive rate
• Confirm guarantees and ask to see examples of past work

For tradespeople committed to quality and a job done right, search for fibreglass roofing installation services in Western Isles with Checkatrade.