Freshly laid OSB flat roof timber decking boards on a residential extension preparing for waterproofing
Seamless GRP Fibreglass Roofing • Slough & Thames Valley

Grp Fibreglass Roofing in Addlestone

Serving Surrey & Surrounding Areas

Need Grp Fibreglass Roofing in Addlestone ?

Thames Valley flat roofing specialists based in Datchet, installing tough, joint-free GRP fibreglass systems and resolving persistent roof leaks across Surrey. From extension overlays to complete tongue-and-groove deck replacements, we ensure correct falls and seamless weatherproofing.

24/7 Emergency Leak Service Seamless GRP Fibreglass Free Written Quotations
Roofing teams available across Surrey

Expert GRP Fibreglass Roofing Services in Addlestone

High class roofing provides professional GRP fibreglass roofing installations across Addlestone and the surrounding Runnymede area. Led by Jimmy Frankham, our team specialises in installing seamless, Glass Reinforced Polyester membranes that offer a superior alternative to traditional mineral felt. Whether you are upgrading a leaking flat roof on a home extension or finishing a new balcony, we deliver durable, weather-resistant solutions from our operational base in nearby Datchet.

Seamless grey GRP fibreglass flat roof installation with skylight on a domestic property
Why Choose Us

Why choose GRP over traditional flat roofing?

Traditional multi-layer mineral felt often suffers from seam failure and blistering after prolonged exposure to the British climate. In contrast, GRP fibreglass creates a completely seamless, joint-free waterproof barrier. Because it is a cold-applied system, there is no need for torches or naked flames, which removes unnecessary fire risks during installation. The result is a robust, UV-resistant surface that is tough enough to withstand light foot traffic, making it an ideal choice for residential extensions and garage roofs throughout Addlestone.

Seamless, Joint-Free GRP Waterproofing

Structural OSB3 Decking & Fall Correction

Preformed Edge Trims & Lead Wall Flashing

UV-Resistant, Impact-Tough Topcoat Finishes

Building Regulations Part L Thermal Compliance

Serving Slough, Windsor, Maidenhead & Uxbridge

Roofing maintenance and preparation on a residential flat roof extension in Berkshire
100% Seamless GRP Waterproofing
24/7 Emergency Roof Leak Response

Seamless Waterproofing

Cold-applied GRP fibreglass forms an impermeable, joint-free membrane over dormers, garages, and domestic extensions.

Expert Decking & Falls

Fitted to OSB3 tongue-and-groove decking with correct perimeter upstands, eliminating pooling and meeting Part L requirements.

Thames Valley Coverage

Prompt local service across Datchet, Slough, Windsor, Maidenhead, Uxbridge, and surrounding areas within 15 miles.

Roof replacement and structural strip down on a residential extension showing exposed roof timbers and stacked tiles
Freshly laid OSB flat roof timber decking boards on a residential extension preparing for waterproofing
100% Seamless GRP Weatherproofing
Who We Are

Compliance and thermal performance for your roof

When replacing a flat roof covering, it is essential to consider current standards. We ensure all our flat roof installations adhere to Building Regulations Part L regarding thermal performance. This is particularly important when replacing more than 25 percent of your roof covering, as it provides an opportunity to upgrade your insulation, keeping your property warmer in winter and reducing energy costs. We assess the specific requirements of your building structure to ensure the system is fit for purpose.

Slough & Thames Valley

Available 24/7

Speak With Jimmy Frankham

01256 639416
Seamless grey GRP fibreglass flat roof installation with skylight on a domestic property

Professional installation for local building stock

The homes in and around Addlestone range from traditional post-war semi-detached houses to contemporary properties, each with unique drainage challenges. Our team understands how to manage proper fall and drainage for flat roofs to prevent water pooling, which is a common cause of premature roof failure. Whether you have a simple garage roof or a complex architectural extension, our approach ensures that every edge, upstand, and trim is finished to a high standard, preventing water ingress and protecting your home timbers.

Roofing maintenance and preparation on a residential flat roof extension in Berkshire

Areas We Cover

High class roofing: Providing expert roof leak repairs, pitched and flat roofing solutions across Datchet, Slough, Windsor, Maidenhead, Uxbridge, and surrounding areas within a 15-mile radius.

01256 639416

How to arrange a survey and quotation

If you are concerned about the condition of your flat roof or are planning a renovation project, we are here to help. We provide thorough site surveys to diagnose underlying issues, such as trapped moisture or failing boards, before recommending the best course of action. Because High class roofing operates 24/7, we are ready to assist with both urgent leak repairs and scheduled refurbishments. Contact Jimmy Frankham at High class roofing on 01256 639416 to arrange a site survey and receive a detailed, no-obligation quotation for your property in Addlestone.

Grp Fibreglass Roofing in Addlestone And Surrounding Areas

Local Addlestone Experts Operating Across All Of Surrey

Datchet Operating Hub • 15-Mile Service Radius

Our Base & Coverage Area

33 Montrose Avenue, Datchet, Slough, SL3 9NH

Direct to your property: Specialist GRP fibreglass installation and flat roof repairs across Slough, Windsor, Maidenhead, Uxbridge, and all areas within 15 miles of Datchet.
Book an On-Site Survey
Thames Valley Flat Roofing & Leak Repairs

Struggling with a Leaking Flat Roof? Get an Expert GRP Survey in Slough

From persistent standing water on garage extensions to severe storm-damaged mineral felt, Jimmy Frankham provides dependable GRP fibreglass installations and prompt leak repairs across Slough, Windsor, Maidenhead, and Uxbridge.

01256 639416 Free Site Surveys • 24/7 Emergency Weatherproofing
100% Seamless Joint-Free GRP Fibreglass
Part L Aware Thermal Upgrade Guidance
Local Specialist Slough, Windsor & Maidenhead