The importance of choosing accredited conservatory installers

• 23 August, 2026|
• News

Whether you’re installing a new conservatory from scratch or simply replacing the roof to enjoy better thermal performance, the significance of choosing the right installer cannot be understated.

Either project mentioned above is a significant investment, and to ensure you’re in the safest hands possible, there are a few key accreditations that you can look out for, ensuring your installer is reputable. These include FENSA, CMS Quality Mark, UKAS, BSI and PAS 24.

There are a few reasons why this is so important. An accredited installer will ensure your installation meets building regulations, has guarantees, and is as thermally efficient as possible.

After all, a conservatory roof replacement is genuinely a transformative home upgrade, if you choose the right company.

Why working with accredited conservatory installers is so important

Accreditations are one of the clearest ways to separate reliable conservatory installers from those who may have untrained staff and little regard for industry standards.

Here are a few key reasons why selecting an accredited installer matters:

Your installation will meet building regulations

Building regulations exist to make sure home improvement work is safe, structurally sound and energy efficient. These standards are updated constantly in-line with changing requirements, and a reputable installer will keep up with them, often exceeding the minimum threshold.

Accredited installers can also self-certify compliance on your behalf, saving you the cost of third-party inspector fees and the hassle of seeking regulation approval independently.

You’re protected in the long run

A fully certified installation usually comes with a guarantee for both the workmanship and the product itself. If issues arise with the conservatory roof, glazing or structure after the final installation, you have a clear route to getting them resolved. Without accreditation, that kind of guarantee simply doesn’t exist.

The products are independently tested

Accreditation covers the products as well as the installer. Recognised accreditations like PAS 24 and CMS Quality Mark are only awarded after rigorous independent testing, meaning the windows, doors and roof systems used in your conservatory project have been proven to deliver on security, thermal performance and weather protection.

The risks of working with unaccredited traders

It can be tempting to go with a cheaper quote from local traders who aren’t signed up to any independent certification scheme. But the potential issues that come with unaccredited conservatory installation can be significant.

No workmanship warranty or consumer protection

Without accreditation, there are no ongoing checks of your work, no workmanship checks built into the process, and no independent body to turn to if the quality of workmanship falls short. If problems emerge, you could be left covering the costs yourself.

Costly remedial work

Poor product performance and substandard installation can lead to leaking roofs, draughty frames and condensation between glazing panes. What looked like a saving at the quote stage can quickly become a costly bill. This is a potential problem that’s far more common with unaccredited conservatory companies than many homeowners realise.

Complications when selling your home

If your conservatory installation isn’t registered with the local council or lacks the appropriate certification, it can cause real problems when you sell. Buyers and solicitors will often ask for documentation, and gaps in your paperwork can delay or derail a sale entirely.

What are the key accreditations to look out for when selecting a conservatory installer?

When you’re researching local conservatory installers and starting to request quotes, here are the accreditations that should be at the top of your checklist.

FENSA

FENSA is one of the most well-known accreditations in the glazing industry, and all Warwick Development installations are FENSA registered.

FENSA certification confirms that your installation complies with building regulations, is registered with the local council, and comes with an insurance-backed guarantee. We register every installation on your behalf and issue a FENSA certificate upon completion, essential paperwork if you ever come to sell your home.

CMS Quality Mark

CMS Quality Mark accreditation is awarded when a product has undergone rigorous independent testing. We hold Gold, Silver and Bronze CMS licences covering security, thermal performance and weather protection. These are among the highest standards in the glazing industry and are a genuine mark of product quality.

UKAS

UKAS, the United Kingdom Accreditation Service, is a nationally recognised body providing certification across many industries. In glazing, UKAS certification verifies exceptional product quality, and a commitment to meeting the latest regulations. It’s something that isn’t too common in the industry, so if you can find an installer with this trust factor, it’s really beneficial.

BSI

The BSI (British Standards Institution) is the UK’s national standards body. BSI certification promotes quality across windows, doors and associated products. Many of the products we supply and install carry BSI certification, giving you confidence that what’s going into your home meets a recognised national standard.

PAS 24

PAS 24 focuses specifically on security. Windows and doors carrying PAS 24 accreditation have been independently tested to ensure they provide adequate protection against forced entry, giving you extra peace of mind that your home is properly protected.

Conservatory roofs from Warwick Development

We supply and install a range of high-quality conservatory roofs, whether you’re starting from scratch or exploring conservatory refurbishments.

Using Eurocell systems, our roofs are built to perform and suit a wide range of conservatory styles and property types.

Our roof options include:

• Glass conservatory roofs, fully glazed and maximise natural light in your space. Modern glazing offers good energy efficiency, so you don’t need to worry about overheating or chills in the winter.
• Tiled conservatory roofs, they’re strong, weather-resistant solid roof systems and offer best-in-class thermal performance
• Equinox tiled roof systems, a popular choice for homeowners wanting a solid, insulated roof
• Skypod roof lanterns, raised structures that protrude from flat roofs, they let light in from all angles
• Aliver flat rooflights, square (up to 1500mm x 1500mm) and rectangular (up to 2000mm x 1000mm)

Key features:

• Solar control glass regulates the temperature of your living space year-round, whether that’s keeping it cool in the summer or warm in the winter.
• Self-cleaning dual action glass coating for low maintenance
• 24mm glazing as standard with toughened and Perfect Day glass options
• Manual and automatic vent options
• Suitable for new build and replacement conservatory projects alike
• Designs to suit modern and traditional property styles

Who are Warwick Development?

We’re a Sheffield-based, family-run glazing business with over 30 years of experience. We manufacture, supply and install uPVC, composite and aluminium glazing products, and we hold accreditations including FENSA, CMS Quality Mark (Bronze, Silver and Gold), UKAS, PAS 24 and BSI.

For homeowners, we offer a full design and installation service within a 45-mile radius of Sheffield. Our showroom is open Monday to Friday, and you’re welcome to come in and see the products for yourself.

If you’d like a free quote or want to talk through your conservatory project, we’d love to hear from you. Call us on 0114 257 1200 or fill in our online contact form and we’ll get back to you as soon as we can.