Window certification explained for homeowners
When you’re investing in new windows for your home, the last thing you want is to find out down the line that the work doesn’t meet legal compliance, or worse, that you can’t sell your home without jumping through hoops. That’s where window certification comes in. It’s the homeowner’s safety net, your proof that your replacement windows have been fitted to the required standards by a competent person who knows exactly what they’re doing.
In short, window certification protects your investment, confirms building regulations compliance and gives you the peace of mind that your windows will perform for years to come. From thermal efficiency (how well your windows keep heat in your home) to security and longevity, certification covers all the bases. Throughout this blog, we’ll walk you through everything you need to look out for when choosing replacement windows, including FENSA accreditation, lengthy guarantees and Secured by Design compliance.
At Amazing Glazing, we’ve been installing windows and doors across Kent for over 15 years, and we hold all the credentials that matter. Here’s what you need to know.
What is window certification?
Window certification is essentially proof that your windows, and the work carried out to install them, meet UK Building Regulations and recognised legal standards.
It covers everything from the materials used and the energy efficiency of the glazing through to the professionalism of the installer and the security features built into the product.
Why does window certification matter when finding replacement windows?
Without proper certification, you’re taking a real gamble. Uncertified installations can mean failing to meet UK building regulations, facing additional costs to put things right, struggling to sell your home and ending up with windows that simply don’t perform as they should. You might also be left without a warranty if the installation company stops trading.
Choosing a certified installer means avoiding all of that. Here are the key benefits of window certification:
- Thermal efficiency: Certified windows must meet minimum standards of quality for energy efficiency, meaning reduced heat transfer. This keeps your rooms warmer in winter, cooler in summer and your energy bills lower.
- Security: Certification ensures your new windows include multi-point locking systems and meet recognised security benchmarks, helping protect your home and family from intruders.
- Aesthetics: Approved products from reputable manufacturers come in a wide range of finishes and styles, so you don’t have to compromise on how your home looks to meet legal requirements.
- Longevity: Properly certified windows are built to last. They’re tested against the elements, meaning they’ll continue performing year after year.
- Durability: Certified installations use quality materials installed to the required standards, reducing the chance of issues like draughts, leaks or seal failures.
What types of certifications should I be looking for when choosing new windows?
Not all certifications are the same. Some relate to the installer, some to the products themselves and others to the security hardware. Here are the three you should be looking out for.
FENSA accreditation
FENSA (the Fenestration Self-Assessment Scheme) was introduced by the UK government in 2002 as the first Competent Person Scheme for windows and doors. It allows registered installers to self-certify that their work complies with UK building regulations, removing the need for separate building control approval.
Is a FENSA certificate really that important?
Yes, absolutely. A valid FENSA certificate proves your installation meets legal standards, has been registered with your local authority and complies with energy efficiency rules. Solicitors sometimes request it during the conveyancing process, so without one, selling your home can become a real headache.
In summary, FENSA installers offer:
- Guaranteed building regulation compliance
- A FENSA certificate registered with your local council
- Insurance-backed guarantees as standard
HomePro insurance-backed guarantee
A HomePro insurance-backed guarantee protects you if your installation company ceases trading during the warranty period. It’s a recognised consumer protection scheme that adds a real layer of security to your investment.
Why it matters:
- Protects your warranty even if the installer goes out of business
- Backed by a regulated insurance provider
- Recognised across the UK glazing industry
- Adds peace of mind for the full length of your guarantee
Secured by Design compliance
Secured by Design (SBD) is the UK Police’s flagship initiative aimed at reducing crime through tested security standards. Products carrying SBD compliance have been independently tested to police-preferred specifications.
Why it matters:
- Meets police-approved security standards
- Tested against forced entry attempts
- Includes high-performance locking mechanisms
- Helps deter opportunistic break-ins
Replacement windows from Amazing Glazing
We’re proud to hold all of the above certifications. As FENSA-registered installers, every job we complete comes with FENSA certification, a HomePro 10-year insurance-backed guarantee and Secured by Design-compliant products.
All our windows are made using uPVC, the UK’s most popular window material. uPVC is affordable because it can be mass-produced (unlike timber for instance), and as a result has a lower price. Double glazing is standard; the option to upgrade to triple is available.
While it’s traditionally associated with a plain white finish, modern uPVC comes in woodgrain effects that beautifully replicate wood, plus contemporary shades like anthracite grey and black.
Here’s a closer look at our range.
Casement windows
Casement windows are the UK’s most popular style. They’re side-hinged or top-hinged and open in a similar manner to a door. Operated with a simple handle and locked using a multi-point system, they’re reliable, easy to use and excellent for ventilation.
- Typical U-values around 1.2 W/m²K or better
- Available with double or triple glazing
- Multi-point locking as standard
- Wide choice of colours and finishes
Flush sash windows
Flush sash windows have a sash that sits level with the frame, creating a flat, heritage-style appearance. They open like a casement window but offer that classic timber look, perfect for period properties or conservation areas.
- Traditional aesthetic with modern performance
- Wood-effect foils available (oak, rosewood and more)
- Excellent thermal efficiency
- Low maintenance with no sanding or painting required
Sliding sash windows
Sliding sash windows replicate traditional vertical sliding timber windows. The sashes move up and down on a balanced mechanism, often with a tilt function for easy cleaning. We supply ours using Eurocell profiles for authentic style with modern efficiency.
- Classic heritage appearance
- Smooth vertical operation
- Optional tilt-in function for cleaning
- A-rated energy efficiency available
Tilt and turn windows
Tilt and turn windows offer a clever dual-opening mechanism. Tilt them inwards from the top for secure ventilation, or fully open them inwards like a door for cleaning and maximum airflow. They’re brilliant for upper floors and apartments, especially if you have young children, as you can open the window for fresh air without worrying about their safety.
- Easy to clean from the inside
- High-security European mechanisms
- Child-safe ventilation tilt function
- Slim sightlines for more glass area
Who are Amazing Glazing?
We’re a Kent-based team specialising in window and door installations, with over 15 years of experience helping homeowners across Kent and the south east of England. We’re FENSA-approved, all our products come with HomePro 10-year insurance-backed guarantee documentation, and our installations meet Secured by Design standards.
Our product range includes:
- Windows: casement, flush sash, sliding sash, tilt and turn
- Doors: composite, French, sliding, bi-fold and entrance doors
- Conservatory insulation, roofline products and glazing upgrades
If you’re thinking about replacement windows and want to work with a friendly, fully certified local team, get in touch for a free, no-obligation quote today. You can do this by contacting us, or by simply filling out our simplistic online form.
0800 062 2103
Unit 107/108, Joseph Wilson Industrial Estate, Whitstable, Kent CT5 3SN
