why choose us?

Building owners, managers, and facility operators can assume responsibility for thousands of square metres of building area, and Sika Sarnafil understands the pressure that comes with this. That is why we have developed Sarnafil Plus, our flagship refurbishment offer.

  • The World's leading single ply manufacturer established over 50 years ago
  • Product life expectancy of over 40 years (in the opinion of the BBA)
  • Detailed pre-installation survey and assessment
  • 20 year single point guarantee including the cover of existing substrates and contractor insolvency
  • Registered installers

Survey Plus - We make the decisions you don't have to

Sarnafil Plus takes the responsibility away from the client and passes it to our dedicated Surveyors who will conduct a comprehensive roof survey to determine which system is suitable for your roof.

During the survey a core sample will be taken to assess the current roof construction and the condition of the substrate. All of Sika Sarnafil’s partners including KingSpan, SFS Intec& Brett Martin Daylight Systems will also have input in the survey to ensure all variables of the roof are covered. The investigation includes a photographic record and, where appropriate, investigative methods such as core samples and pull out tests will be used to confirm the condition of the existing roof, to ensure that every decision is educated.

Specification Plus

Following the roof survey our technical team will create a bespoke specification including project specific detail drawings, tapered insulation plans and roof layouts (where required), U-Value Calculations, Wind Uplift Calculations, Condensation Risk Analysis.


As our flagship refurbishment product, the Sarnafil Plus package offers only a single point guarantee option, ensuring that you are protected against the unlikely problems that may arise from the failure of Sika Sarnafil membranes caused by incorrect design, defective materials, or poor workmanship, through the issue of a Sarnafil Plus Product Guarantee and our Installation Certificate.


Unlike others in the market, the Sarnafil Plus Guarantee also covers an existing substrate if it is deemed adequate, and also covers the insolvency of any of our registered installers.

Ongoing Support

A building’s roof can fail for a number of reasons, most commonly from general deterioration over its lifetime, ever changing weather conditions and temperatures, building movement or settling, and unsuitable design. What often doesn’t change is the continual time and investment needed to maintain roofs once they have been installed, with large proportions of refurbishment budgets being re-invested into roof maintenance every year.

But this doesn’t have to be the case. The Sarnafil Plus service also includes a roof maintenance plan, which comprises of ongoing support from our nationwide network of Sika Sarnafil field technicians who will undertake regular inspections of your roof after the first 5 years since installation, and if needed, routine remedial work for maintenance will be carried out by our registered installers.

Periodic inspection and maintenance of roofing assets are the most important elements of a successful roof maintenance programme, and in turn are proven to reduce ownership costs and leak frequency, extend the roof’s life cycle and most importantly, provide facilities and building management operations with fewer interruptions.

Note: Information contained on this page does not apply to Sika Roof Assured projects.