Single Ply Roofing Experts in Oxford

If you want a lasting flat roof solution that withstands the British elements, talk to us about single ply roofing. James Dunn Roofing Ltd are experts in flat roof solutions. Based in Oxford and servicing Oxfordshire, we use Sarnafil waterproofing membranes. The membranes have been independently assessed by the British Board of Agrément and their life expectancy is over 40 years. Talk to us about your roofing solutions today.

Top Quality Roofing

Roof Assured by Sarnafil products can be used for a wide range of home improvement projects from a house extension or orangery, to flat roof repairs and green roofs.


Offering home owners an unrivalled roofing system from the leading manufacturer in single ply membranes. Whatever your flat roofing need, you can be confident we’ll provide a solution that continually performs beyond expectations and adds real value to your home.

You may also be interested to know that Sarnafil products have been used in television programmes such as Grand Designs, Property Ladder, Help my House is Falling Down and Channel 4’s Inside Out Homes.

• 15 year guarantee
• Trusted installers

• Aesthetically pleasing
• 40 year life expectancy

single play roof and drain pipe

Expert Installers in Oxfordshire

Sika Sarnafil single-ply waterproofing membranes are popular with architects for their durability and aesthetics. James Dunn Roofing Ltd are registered and trained installers of the Sika Sarnafil Roof Assured system, an ideal and long-lasting flat roof solution for homeowners and self-builders.

Sarnafil Roof Assured products are only supplied to registered installers to help homeowners get the best possible roofing solutions – available with a 10-year insurance-backed guarantee and 15-year manufacturers guarantee, covering the Sarnafil membrane and ancillary products.


Call for a Free Estimate

Let us find the best roofing solution for your property and your budget today. Give us a call on 01865 373 614 for a free estimate on single ply and other roofing materials.

Get In Touch

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