
Flat Roofing Specialists in London & Surrey
Trusted Flat Roof Installation, Repairs, and Maintenance
At Barris Roofing, we provide expert flat roofing solutions for both domestic and commercial properties across London, Surrey, and the South East of England. With decades of experience and accreditations from Trustmark, NFRC, and Competent Roofer, we’re the go-to professionals for all your flat roofing needs.
Whether you need a new flat roof installation, emergency flat roof repair, or regular flat roof maintenance, our skilled team guarantees top-quality workmanship and long-lasting results.
Flat Roofing Services We Offer
1. Flat Roof Installation
We specialise in installing durable and energy-efficient flat roofs using high-quality materials like:
EPDM Rubber Roofing: Ideal for its flexibility, weather resistance, and long lifespan.
GRP Fibreglass Roofing: Seamless and low-maintenance solutions, perfect for both homes and businesses.
Torch-On Felt Roofing: Cost-effective and highly durable, suitable for a variety of applications.
2. Flat Roof Repairs
Is your flat roof leaking, sagging, or showing signs of wear? Our expert team offers fast and reliable repair services to address:
Leaking flat roofs
Ponding water issues
Torn or damaged membranes
Cracked or blistered surfaces
3. Flat Roof Maintenance
Prolong the life of your roof with regular maintenance. We provide:
Annual inspections to identify potential issues early
Gutter cleaning and debris removal to prevent drainage problems
Full flat roof health reports
Why Choose Barris Roofing for Flat Roof Services?
Accredited Professionals
Fully certified under NFRC, Trustmark, and Competent Roofer schemes, ensuring industry-standard excellence.
Comprehensive Services
From EPDM rubber roofing to GRP fibreglass roofing and torch-on felt systems, we offer tailored solutions for all types of flat roofs.
Local Expertise
We proudly serve areas across London, Guildford, Oxted, Epsom, Crawley, and beyond.
Flat Roof Repairs with Fast Turnaround
Our team specialises in fixing leaks, cracks, and weather damage promptly to minimise disruption to your home or business.
Competitive Pricing
Affordable flat roofing solutions without compromising quality, with detailed quotes and no hidden charges.
Flat Roofing for Domestic and Commercial Clients
We work with homeowners, landlords, and business owners to deliver flat roofing solutions tailored to your needs. Whether you’re replacing the roof on a garage, house extension, or commercial building, our team ensures a smooth and efficient process from start to finish.

Understanding Between-Joist Insulation and Condensation Issues
Older flat roofs often feature between-joist insulation, which may lead to serious condensation problems if not properly ventilated. When warm air from inside the building rises, it meets the cold air trapped between the joists, causing condensation to form on the underside of the roof deck. Over time, this can lead to:
Mould and mildew growth
Rotting of the timber joists
Damage to the roofing membrane
Solution: Warm Roof Construction
Switching to a warm roof design eliminates these condensation issues by placing the insulation above the roof deck, creating a continuous thermal barrier. This modern roofing method offers:
Improved energy efficiency by minimising heat loss
Reduced risk of condensation and moisture damage
Better ventilation, ensuring the timber structure remains dry and sound
If your property still has between-joist insulation and you’re experiencing condensation or damp problems, upgrading to a warm roof system is the best long-term solution.
Non-LED Uplighters and Flat Roof Condensation
Non-LED uplighters are a common yet overlooked cause of condensation issues in flat roofs. These older lighting systems emit significant amounts of heat, which rises into the ceiling void. When the hot air comes into contact with colder surfaces, such as poorly insulated or unventilated flat roof areas, condensation forms. Over time, this can result in:
Damp patches on ceilings
Peeling paint or wallpaper
Structural damage caused by trapped moisture
Solutions: Energy-Efficient Lighting and Roof Upgrades
Replace Non-LED Uplighters: Switch to energy-efficient LED uplighters. These lights produce less heat and significantly reduce the risk of condensation while lowering your energy bills.
Warm Roof Renewal: If your flat roof is outdated, consider a full warm roof renewal. This upgrade ensures proper insulation and ventilation, preventing moisture from building up within the roof structure.
Install Vapour Barriers: During a warm roof renewal, vapour barriers can be added to further control moisture levels and protect the internal structure.
Areas We Cover
As a local roofing company, we proudly serve the following areas:
London
Surrey (including Guildford, Woking, Epsom, Reigate)
Oxted, Caterham, and Godstone
Croydon, Bromley, and surrounding areas
Crawley and the South East
Looking for flat roof specialists “near me”? Wherever you are in the South East, Barris Roofing is here to help!
External Links
Add credible outbound links to relevant resources (e.g., government building standards or manufacturers):
NFRC Roofing Accreditation: "Learn more about roofing standards from NFRC"
Alltype Material Suppliers: "Discover the benefits of GRP fibreglass roofing at Alltype Roofing."