Choosing a reputable fibreglass roofing contractor in the UK is crucial for ensuring durability, weather resistance, and proper installation. A poor choice can lead to leaks, structural damage, and costly repairs. Many homeowners and business owners struggle to identify reliable contractors due to the number of options available. This impartial guide will help you navigate the selection process, highlighting key factors to consider and red flags to avoid.

Understanding the Different Fibreglass Roofing Systems

Fibreglass roofing, commonly known as GRP (Glass Reinforced Plastic), is a durable, seamless, and waterproof solution ideal for flat roofs, balconies, and commercial properties. One of its main advantages is longevity, as it can last over 25 years with proper installation. Additionally, it provides excellent waterproofing due to its seamless finish, which eliminates the risk of leaks. Maintenance requirements are minimal compared to traditional roofing materials, making it a cost-effective choice in the long run. Its versatility also makes it suitable for various applications, including residential, commercial, and industrial properties.

There are many different fibreglass roofing systems available on the market, each with unique properties and applications. It is essential to familiarise yourself with these systems and understand their differences to ensure you select the most suitable option for your project. Factors such as resin types, reinforcement materials, and topcoat specifications can significantly impact performance and longevity. Understanding these distinctions will help you make an informed decision when choosing a contractor and a roofing system that best fits your needs.

Key Factors to Consider

1. Accreditations & Certifications

Hiring a certified contractor ensures compliance with industry standards and regulations, providing peace of mind that the work will be completed to a high standard. In the UK, roofing contractors should be accredited by recognised bodies that assess their technical competency, health and safety compliance, and adherence to best practices. These include:

Working with a contractor who holds these accreditations ensures that they follow industry best practices, use high-quality materials, and comply with UK building regulations. It also provides assurance that the contractor has undergone necessary training and assessments to meet professional standards.

2. Experience & Specialisation

Choosing a contractor with extensive experience in fibreglass roofing is essential for ensuring a high-quality installation. Not all roofing contractors specialise in GRP roofing, and hiring a general roofer may result in poor workmanship and suboptimal performance.

Proven Track Record

A reputable contractor should have a solid track record of successful fibreglass roofing installations. Look for companies with years of experience specifically in GRP roofing, as they will be more familiar with the challenges and best practices associated with this type of installation. Contractors with a proven history of projects demonstrate their ability to deliver quality work consistently.

Portfolio of Past Projects

Examining a contractor’s portfolio provides a clear indication of their expertise. A reliable contractor should be able to show examples of their completed fibreglass roofing projects, including before-and-after images, detailed case studies, and customer testimonials. This allows you to assess the quality of their workmanship and determine whether their experience aligns with your project requirements.

Knowledge of Best Practices

GRP roofing requires a specific skill set and adherence to best practices to ensure durability and waterproofing. Experienced contractors understand the importance of correct resin application, reinforcement techniques, and topcoat finishing. They should be able to explain their installation process in detail and provide guidance on how they ensure a seamless, long-lasting roof.

3. Customer Reviews & Word of Mouth

While not completely foolproof, sites like Checkatrade and Rated People are platforms that vet and verify contractors before listing them. These websites offer detailed customer feedback, star ratings, and even verified project photos. Contractors on these platforms often go through an approval process, which may include background checks, insurance verification, and customer references. Hiring a contractor with positive feedback on these platforms adds another layer of reassurance.

Personal recommendations remain one of the most reliable ways to find a high-quality contractor. If friends, family, or colleagues have recently had a fibreglass roof installed, ask about their experience. Word of mouth is particularly useful because it often includes insights that online reviews might miss, such as how the contractor handled unexpected challenges or their approach to customer service. Additionally, many reputable contractors rely on referrals, meaning those with a strong reputation are more likely to provide excellent service.

By thoroughly researching reviews, case studies, and word-of-mouth recommendations, you can make a more informed decision when selecting a fibreglass roofing contractor, ensuring you choose a company with a strong track record of delivering quality work and excellent customer service.

4. Insurance & Warranty

Ensure the contractor carries the necessary insurance and offers solid warranties. Before committing to a contractor, verify the validity of their insurance policies and warranties. Request copies of their insurance documents and check with the insurer to confirm coverage. Similarly, for manufacturer-backed warranties, ensure that the contractor is an approved installer of the specific GRP roofing system they are offering.

Allbase for example has a guarantee scheme called Basecare which provides a range of different protection options for its liquid-applied roofing systems including the Fibrelast GRP system.

By ensuring the contractor has the necessary insurance and warranty coverage, you protect yourself from unforeseen liabilities and guarantee that your fibreglass roofing system will stand the test of time. Investing in a properly insured and warranty-backed installation provides peace of mind and long-term security for your property.

5. Compliance with UK Building Regulations

Ensuring that your fibreglass roofing installation complies with UK building regulations is crucial to meeting safety, energy efficiency, and structural integrity standards. Working with a qualified contractor who understands and adheres to these regulations will help avoid potential legal or structural issues down the line. Regulations may include requirements for insulation, drainage, and fire safety, depending on the nature of your project.

It is always advisable to check whether your project requires planning permission or approval from building control, particularly for larger commercial installations or significant structural changes. A reputable contractor should be familiar with these requirements and assist with obtaining the necessary approvals.

For more in-depth details on UK building regulations including specific compliance guidelines, please refer to our comprehensive guide to UK building regulations for GRP fibreglass flat roofs.

6. Pricing & Quotes

When obtaining quotes from fibreglass roofing contractors, it is important to request multiple detailed quotations to compare costs effectively. A comprehensive quote should include an itemised breakdown of materials, labour, and additional charges, ensuring transparency in pricing.

It is advisable to be cautious of unusually low quotes, as these may indicate the use of substandard materials or rushed workmanship. If a contractor offers a price significantly lower than others, investigate why their costs are reduced and ensure they meet industry standards.

Clarifying what is included in the quote is essential. Some quotes may not cover important aspects such as waste removal, scaffolding, or aftercare services, which could lead to unexpected expenses later. Always verify whether these necessary components are accounted for in the contractor’s pricing.

Negotiating payment terms is also a key aspect of securing a fair deal. Avoid paying large upfront deposits, as reputable contractors typically structure payments in stages, aligning them with the project’s progress. This ensures accountability and provides financial protection throughout the roofing process.

Red Flags to Watch Out For

A lack of proper documentation is one of the biggest warning signs when dealing with a contractor. If they are unable or unwilling to provide a written contract, detailed warranty information, or proof of insurance, it is best to look elsewhere. Contractors who avoid transparency in their agreements often cut corners in their work.

Unrealistically low quotes can be another red flag. While competitive pricing is important, significantly lower prices compared to market rates often indicate the use of substandard materials or rushed labour. If a quote seems too good to be true, it is worth questioning the quality of materials and workmanship involved.

A contractor’s reputation can also reveal potential issues. Poor online reviews, a lack of verifiable references, or a refusal to provide case studies should raise concerns. Reliable contractors are usually happy to showcase their previous work and provide satisfied customer references.

Unprofessional behaviour and pushy sales tactics can be indicators of an unreliable contractor. Contractors who pressure you into making quick decisions, demand large upfront payments, or fail to communicate clearly may not be trustworthy. Professional roofing contractors should be transparent, patient, and willing to explain the process in detail.

Questions to Ask Before Hiring

A list of just some of the questions you might think about asking a contractor;

Final Decision & Next Steps

Once you have evaluated potential contractors, the next step is to compare their credentials, experience, and customer feedback. Select a contractor who meets your requirements in terms of accreditation, work history, and customer satisfaction. Do not rush this process—taking the time to make an informed decision will help ensure a high-quality installation.

Before work begins, request a written contract outlining all aspects of the project, including materials, labour costs, timelines, and warranties. A detailed contract helps protect both parties and sets clear expectations for the project.

Confirm compliance with UK building regulations by checking whether your chosen contractor has the necessary approvals for your roofing project. If planning permission or building control approvals are required, ensure these are in place before starting the work.

Verify that the contractor’s insurance policies are valid and sufficient for the scope of work. Public liability insurance, employer’s liability coverage, and professional indemnity insurance should be in place to protect against potential issues during the project.

Once the installation is complete, conduct a final inspection to ensure the work meets the agreed-upon standards. If there are any concerns, raise them with the contractor before making the final payment.

Conclusion

Selecting the right fibreglass roofing contractor is essential to ensure a high-quality, long-lasting roof that offers excellent weather resistance and durability. By following this guide, you can make an informed decision based on key factors such as accreditations, experience, customer reviews, insurance, and compliance with UK building regulations. Taking the time to research contractors, compare quotes, and verify credentials will help you avoid costly mistakes and secure a professional installation.

GRP Roofing offers the highest quality fibreglass roofing systems, trims and accessories, ensuring durability and long-term performance. Combining our expert technical support with our nationwide network of approved installers ensures that your roofing project will be completed to the highest industry standards.