When it comes to improving the comfort, energy efficiency, and security of your home, investing in quality double glazing is one of the smartest decisions you can make. But not all double-glazed windows and doors are created equal. At Prior Products, we’ve been helping homeowners make confident choices for over three decades — and in this expert guide, we’ll explain what really matters when choosing double glazing for your home.

1. U-values: Understand the Energy Efficiency Rating

U-values are a measure of how well a window prevents heat from escaping. The lower the U-value, the better the window’s insulation. In the UK, building regulations require replacement windows to have a U-value of 1.4 W/m²K or better — but quality double glazing should exceed this standard.



Look for double glazing with high-performance coatings like Low-E glass, warm-edge spacer bars, and argon gas filling between the panes. These features work together to retain heat during winter and reduce solar gain in summer, helping you save money on your energy bills all year round.

✅ Top tip: Prior Products’ windows are A-rated for energy efficiency, giving you peace of mind that your home will stay warmer for less.

2. Frame Material: Choose the Right Fit for Your Property

The frame material you choose affects durability, insulation, and the overall aesthetic of your home. The most common options are:

• uPVC: Low-maintenance, affordable, and available in a wide range of finishes. Ideal for most residential properties.
• Aluminium: Sleek and modern with slim sightlines. Great for large windows or contemporary designs.
• Timber: Natural and characterful — a great option for period properties, conservation areas, or homeowners looking for a traditional finish.

At Prior Products, we offer a variety of frame styles and finishes to suit your home’s character, including woodgrain-effect uPVC for a classic look without the upkeep.

3. Glazing Type: Go Beyond the Basics

While double glazing is standard, the quality of the glass itself can make a big difference. Consider the following enhancements:

• Low-E Glass: Coated to reflect heat back into your home while still allowing natural light in.
• Toughened or Laminated Glass: For improved security and safety, especially in ground floor windows or doors.
• Acoustic Glass: Reduces noise pollution, ideal if you live near a busy road or flight path.
• Triple Glazing: An optional upgrade offering even better insulation and noise reduction.

💡 Expert insight: Our glazing units are engineered for thermal performance, security, and noise reduction — helping you enjoy a more comfortable, peaceful home.

4. Security Features: Protect What Matters Most

A good window doesn’t just keep out the cold — it keeps out intruders too. Quality double glazing should include:

• Multi-point locking systems
• Toughened or laminated safety glass
• Internal beading (which makes it harder to remove glass from the outside)

At Prior Products, security is built into every product we supply. Our windows and doors are manufactured to the latest security standards, giving you added confidence.

5. Certification and Warranties: Trust the Experts

Look for suppliers who provide certified products that meet or exceed UK Building Regulations. This could include:

• FENSA or CERTASS registration (ensures compliant installation)
• BFRC Window Energy Ratings
• British Standard Kitemarks (e.g. BS 7412 for uPVC window performance)

Prior Products is proud to be fully accredited, and all of our installations come with robust guarantees for both product quality and workmanship — ensuring you have long-term protection.

6. Aesthetics and Customisation: Style Matters

Whether you live in a modern build or a Grade II listed cottage, windows and doors should complement your property. With so many colours, hardware options, and glazing designs available, there’s no need to compromise on style.

From classic white casement windows to woodgrain-effect flush sash designs, Prior Products provides tailored solutions that maintain kerb appeal while delivering modern performance.

7. Experienced Installation: The Final Piece of the Puzzle

Even the best double glazing won’t perform properly if it’s poorly installed. That’s why choosing an experienced, reputable installer is critical.

With over 35 years in the home improvement industry, Prior Products has earned a reputation for quality, trust, and local expertise. Our in-house teams ensure every installation meets the highest standards — no shortcuts, no hassle.

Conclusion: Trust Prior Products for Quality That Lasts

Choosing the right double glazing is about more than just ticking boxes. It’s about combining energy efficiency, security, durability, and design into a product you can rely on for decades. At Prior Products, we don’t just install windows — we help homeowners make informed, confident choices for their homes.

If you're ready to upgrade your windows or doors, contact us today to request a free, no-obligation quote — and discover the difference that true expertise makes.