Your flat roof...

Sarnafil Roof Assured

A flat roofing solution that not only looks good but lasts.

Sarnafil single ply membrane roofing systems are renowned throughout the world for providing high quality long lasting roofing systems.

If you have a leaking roof , are looking to smarten up your home or need some roofing advice then a Roof Assured system, installed by Winstanley Windows, can help. Suitable for new build, refurbishments, contemporary or heritage properties, you can rely on a Roof Assured system to provide a solution.

Whatever your flat roof requirement, you can feel confident that a Roof Assured installation will give you a flat roof solution that not only looks good, but is virtually maintenance free.

The Roof Assured roofing material is independently certified, by the BBA, (British Board of Agrément, Certificate No: 08/4532), to have a life expectancy of ‘in excess of 40 years’ which, when combined with expert installation by one of our experienced installers, means that you can sit back secure in the knowledge that you have a roof that will stand up to whatever the weather throws at it.

Every Roof Assured installation comes with the peace-of-mind of a watertight guarantee.

We provide a 15 year guarantee covering both the Sarnafil membrane and Sarnafil ancillary products used within the installation. We are also pleased to offer an additional Independent Insurance Backed Guarantee which can provide you with cover and post completion insolvency cover for 10 years.


Why not complete your new extension with the addition of a Sarnafil Roof Assured system to complement you home.

  • Environmentally friendly
  • Installed by trained fitters
  • Low maintenance


Transform your flat roof into an impressive design lead terrace or even a roof top garden.

  • Structurally proven
  • Weather resistant
  • Hard wearing


Traditional felt based roofs support moss and bacteria growth and generally have a poor appearance. Replacing it with a Sarnafil Roof Assured system will modernise the exterior whilst benefiting for years to come.

  • No longer an eye-sore
  • No moss and plant growth
  • No problem of bacterial growth

Conservatories, Gardens Room & Orangeries

Sarnafil products have been used on a wide range of applications over the years. Our experience means that whatever the applications, we have a solution.

  • Lasting performance
  • Proven design
  • Aesthetically pleasing

Examples of our work...


Sarnafil Product Demonstration Video

See for yourself the benefits of having a Sarnafil flat roofing system.


Tel:  01303 249048
Fax: 01303 244443

  [email protected]