About Guardian

Over 30 years of designing and fabricating innovative home improvement solutions

Our expert team specialises in the design, fabrication, and installation of high-quality home improvement systems across the UK and Ireland. We take pride in delivering exceptional products and services—always with a personal touch. This commitment is supported by our extensive Certified Fabricator Network, which supplies bespoke solutions to our Certified Installer Network, ensuring quality and efficiency on every project.

Our journey began in 1997, when we identified a common concern among homeowners: conservatories that were too hot in summer and too cold in winter. In response, we developed a unique solution—the Guardian Warm Roof—designed to make conservatories comfortable all year round.

Since then, with over 100,000 warm roof installations completed across the UK and Ireland, we’ve continued to drive innovation with groundbreaking systems like the Guardian Home Extension. To explore our history, view our timeline here: https://guardianbuildingsystems.co.uk/brand-history/

Certified Installers

We work with a trusted network of independent companies across the UK through our Guardian Certified Installer scheme—covering both the Guardian Warm Roof and the Guardian Home Extension systems.

Choosing the right installer is crucial. Your installer must be not only reliable, efficient, and communicative, but also fully trained in the correct installation of our systems. That’s why we hold every Certified Installer in our network to high standards, even though they operate independently of Guardian Building Systems.

Each Guardian Certified Installer must: Provide a 10-year workmanship guarantee Offer an insurance-backed guarantee Pass a credit check Have a minimum of one year’s trading history Hold public liability insurance of at least £1 million

This ensures that every installation is carried out professionally, giving homeowners complete peace of mind.

Built on Quality

Guardian Building Systems have always put quality at the forefront of everything that we do.

Not only ensuring that our systems our designed to the highest standards but they are also installed by a trusted network of independent Certified Installers. 

Independent Testing – A sign of trust and quality

At Guardian Building Systems, we are committed to independent testing, as we believe it’s essential for ensuring the highest quality and performance of our products. While many systems on the market cannot independently demonstrate their thermal or structural credentials, we rigorously test all our systems with the Building Research Establishment (BRE) to ensure they meet and exceed building regulations. We have the reports to prove it! For more insight into the importance of independent testing, be sure to check out our latest blog post.

TrustMark – Government Endorsed Quality

In 2025, Guardian Building Systems proudly became a TrustMark Scheme Provider, reinforcing our commitment to meeting the rigorous standards set by their Quality Scheme.

We collaborate with our Certified Installers, who are eligible to become TrustMark Registered Businesses, ensuring they adhere to the highest standards of technical competence, customer service, and ethical trading practices.

For homeowners, TrustMark registration offers peace of mind, knowing they’re working with a business that is vetted for quality and professionalism. For trades, it serves as a mark of distinction, demonstrating their expertise and commitment to excellence.

Peace of mind guaranteed

Working with our network of Certified Installer means guaranteeing a smooth installation, but we promise immediate resolutions when things aren’t going as they should. 

We pride ourselves on provide yu with the necessary warranty and guarantees you expect. 

Making building control approval easy

In nearly all instances, a solid roof replacement on your conservatory does not require planning permission, but it does require local authority building control approval.

The Guardian Warm Roof is an approved system by Hertford Building Control which allows any Certified Installer to access and partner with the LABC (Local Authority Building Control) Authority Scheme to swiftly process all necessary building control requirements for your replacement roof.

In short, all of the stress and hassle of building control approval will be taken out of your hands, and you will have the peace of mind that your replacement roof is not only compliant but can also be completed comparatively faster than other solid roof conversions who must take additional time seeking the necessary LABC approval.

Check out our blog for further information on Building Control.