Brothers Alan & Trevor Roberts

Alan & Trevor have been involved in the Construction and Home Improvement Industry, gaining over 80 years of experience between them. As a result, they have a thorough understanding of the full range of insulation techniques and are ready and able to answer any questions you may have.

To ensure the continued success of Thermsure, Steve Williams became an active Director of the company in 2018. Steve’s knowledge and passion for customer experience, coupled with Thermsure’s excellent product range, will allow the company to continue to provide the outstanding service that Thermsure prides itself on.

Our Ethos

We aim to be professional, friendly and honest, ensuring and enjoyable, stress-free experience. We know that satisfied customers are the most important asset for any business and this is why we receive so many recommendations from past customers.

Our high quality, service-based approach has helped satisfied customers throughout North Wales and the North West of England to create their ideal home and we pride ourselves on supplying only the finest quality products available from World leading manufacturers such as Profile 22, Optima, Warncore, Rockdoor and Solidor. We are committed to providing the highest possible standards at unbeatable prices.

Our Process

  • Free Survey

  • Quotation

  • Final Measure

  • Installation Team

  • Finishing Touches

  • Aftercare Services

Free Survey
Following on from your enquiry, a free, no obligation survey is carried out by a member of our experience team. It will involve no hard sell, just the initial measurements and the design of our products you require.

A quotation will then be emailed/posted out to you, depending on which one you prefer. Once you have accepted your quotation a deposit is then required before the final measure.

Final Measure
This stage includes a final survey, as well as any changes or amends at this point. After the final measure, the design is finalised.

Installation Team
Our expert team of fitters with years of experience will install your products in the shortest possible time, with the least possible disruption, at a time which is convenient for you. Each and every one of Thermsure’s installers has spent a minimum of 20 years working in the Construction and Home Improvement Industries.

Finishing Touches
We finish all jobs by checking everything is working correctly and walk you around the finished installation to make sure you are 100% satisfied with our products and workmanship. We respect your property and always ensure that all work areas are thoroughly cleaned and tidied.

Aftercare Services
Once the work is completed, our customer service team will contact you every 6 months to make sure everything is ok. Although if you require anything in the meantime, please do not hesitate to contact us by email – customercare@thermsure.com or by phone on 01978 316950. We don’t stop working for you, even when the job’s done. Our guarantees cover your entire product, and can be easily transferred to new owners should you decide to move.

Plus don’t forget, we offer a Deposit backed guarantee on all jobs.

Useful Information


Why should homeowners buy from a FENSA approved company?

If your installer is a member of a government Authorised  Competant Persons Scheme such as FENSA, firms approved as a FENSA member will have undergone strict vetting procedures and are routinely inspected to ensure building regulation complianceis maintained.

Always ensure that the Glazing and Door company are a member of FENSA this will encourage more companies to sign up and reduce rouge traders in the market.

This will give the customer greater confidence and create a stronger more unified industry.


Home Improvement Protection Scheme
Peace of mind for you……..

We protect your deposit from the moment you pay it and are issued with a deposit protection certificate.

Once you have decided on the work you would like doing by Thermsure and you pay your deposit, that deposit is then fully protected until the completion of the  contract of work.

Guide To Energy Ratings

Guide To Energy Ratings For Windows

What is Energy Rating?

A window’s rating is determined by a formula which takes into account available solar heat gains  subtracts the thermal losses.

Window Energy Rating= Solar Gains – Thermal Losses + Air Leakage.

This is then placed into a band on A-G scale consistent with other energy performance labels already familiar to the consumer

Did you know… The thermal insulation provided by low emissivity double glazing is 25% more efficient than that of standard double glazing. PLANITHERM boasts one of the lowest rates of heat loss, easily complying with building regulations.

All of our Windows contain Planitherm.

As Thermsure we strive to be a socially responsible business all of our Windows achieve a minimum Energy Rating of A and we can offer A++

Growing concern for climate change and increasing energy costs to the consumer are contributing to the rapidly growing market for energy efficient products. Following WER (window energy rating) certification windows can now be added to the list of environmentally responsible options available to the end-user.

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