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Expert roofing and cladding solutions for commercial properties, delivered with precision and care.
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Proudly British Owned & Operated
Expert roofing and cladding solutions for commercial properties, delivered with precision and care.
View All Services
Proudly British Owned & Operated
Specialist commercial roofing tailored to the unique demands of your industry.
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Proudly British Owned & Operated
See how we've transformed commercial properties across London and the South East.
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Proudly British Owned & Operated
Sika, FLAGON and IKO approved single ply membrane installers for commercial flat roofs across London, Essex, Surrey and Kent. Insurance-backed guarantees on all installations.
Single Ply
Exall Group are specialist single ply roofing contractors serving London, Essex, Surrey and Kent. As approved installers for Sika, FLAGON and IKO membrane systems, we design and install single ply roofing solutions for commercial and industrial flat roofs of all sizes — with insurance-backed guarantees on every installation.
Single ply membrane roofing is the preferred system for large commercial flat roofs, offering outstanding weather resistance, flexibility and longevity in a lightweight, easy-to-maintain package. Available in TPO, PVC and EPDM formats, single ply systems can be mechanically fixed, fully adhered or ballasted — with each specification selected to suit your building's structure, use and thermal requirements.
We have installed single ply roofing across a wide range of commercial sectors including education, healthcare, retail and industrial. Notable projects include the University of Hertfordshire De Havilland Campus in Hatfield, where we replaced 3,500m² of student accommodation roofing with a high-performance single ply system.
From initial condition survey through to installation and final sign-off, our experienced team manages every aspect of your project — including all access, waste removal and CDM compliance. Call us today for a free no-obligation site survey.
Our Work
In Progress
Failed asphalt flat roof overlay with Sikaplan SGK single ply waterproofing across 180m². Sikaplan laminated perimeter trims and new through wall parapet outlets throughout.
Green roof removal and single ply membrane replacement for University of the Arts London student accommodation in Peckham.
Restoring storm-damaged roofs with cutting-edge solutions and guaranteed durability.
At the University of Hertfordshire's De Havilland Campus, we replaced 3,500 sq/m of student accommodation roofs with durable Sika-Trocal membranes, ensuring lasting quality with minimal disruption.
Frequently Asked Questions
Single ply roofing is a membrane-based flat roofing system made from flexible synthetic materials including TPO, PVC and EPDM. The membrane is installed in a single layer over insulation, providing a fully waterproof, durable and lightweight roofing solution ideal for large commercial flat roofs.
A correctly installed single ply membrane roof typically lasts 25 to 35 years with minimal maintenance. Many systems come with manufacturer warranties of 20 years or more, and our installations carry insurance-backed guarantees for additional peace of mind.
TPO and PVC are thermoplastic membranes that are heat-welded at the seams, creating a fully bonded waterproof layer. EPDM is a rubber-based membrane that is typically adhered or ballasted. All three systems perform well on commercial flat roofs — we will specify the most appropriate system based on your building type, budget and performance requirements.
In many cases yes, subject to a structural survey confirming the existing deck is sound. Installing over an existing roof can reduce cost and disruption significantly. We will carry out a full condition survey before recommending the best approach.
Yes. Exall Group are approved installers for Sika, FLAGON and IKO single ply membrane systems, meaning we are trained and certified to install these systems to manufacturer specification with full warranty and guarantee backing.
We install single ply roofing across London, Essex, Surrey, Kent and the wider Home Counties. We cover the whole of the South East for large commercial projects.
Tell us about your project and one of our commercial roofing specialists will get back to you within 24 hours.
