Why Choose KJM Group?
Since 1983, KJM Group has been the trusted name for windows in Hampshire and Berkshire. We don't just sell windows; we engineer solutions. Unlike national chains that rely on pressure sales, we operate on a strict "No Pressure Promise."
Triple glazing is complex. If configured incorrectly (e.g. cheap glass), it can actually be worse for noise than double glazing. Our salaried team will give you the physics and the facts, helping you decide if the extra cost is worth it for your home.
Rated 4.9/5 by over 700 local customers
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Quick Summary: Is it for you?
- Warmth: U-values as low as 0.5.
- Comfort: No cold spots near glass.
- Condensation: Eliminated internally.
- EPC: Boosts rating for resale.
- Cost: ~20% more expensive.
- Weight: Needs heavy-duty frames.
- Solar Gain: Less "free heat" from sun.
- Payback: 20+ year financial ROI.
The Anatomy of a Triple Unit
Simply adding a third pane of glass isn't enough. To get A+ rated performance, the gap between the panes is critical. You cannot simply squeeze three panes into a standard frame and expect miracles.
We use a comprehensive system including Warm Edge Spacer Bars to prevent cold bridging and Argon Gas fills to slow down heat transfer.
Furthermore, our high-performance Low-E coatings reflect internal heat back into the room, ensuring that the 44mm unit performs as a cohesive thermal barrier rather than just layers of glass.
Comparing Performance
The thickness of the unit dictates the performance. We always recommend the 44mm unit where possible.
| Unit Depth | Gas Fill | U-Value |
|---|---|---|
| 28mm (Slim) | Krypton | 0.6 W/m²K |
| 36mm (Standard) | Argon | 0.7 W/m²K |
| 40mm (High Perf) | Argon | 0.6 W/m²K |
| 44mm (KJM Gold) | Argon | 0.5 W/m²K |
The KJM Difference: We recommend the 44mm unit wherever possible. It is fully compatible with our premium ranges, including Residence 9, Residence 7, and our Sheerline Aluminium systems.
Decision Tool: Is it Worth It?
The comfort difference will be transformative, and it prepares the home for heat pumps.
Standard triple isn’t best for noise. Ask us for Asymmetric Acoustic glass.
You are unlikely to see the financial return before you sell. Stick to A-Rated double.
Newbury Conservation & Planning
A common concern is whether triple glazing changes the look of a property, especially in conservation areas like Donnington, West Mills, or Speen.
Standard white uPVC frames may not be permitted in these zones due to Article 4 Directions. However, KJM offers Heritage Flush Sash windows with triple glazing. These are designed to mimic the sightlines of 19th-century timber joinery, often satisfying West Berkshire Council planning requirements.
We also pay close attention to the finer details that matter in conservation work, such as mechanical joints rather than modern welds. This traditional construction method ensures your new windows look like original craftsmanship, not mass-produced plastic, helping you navigate the strict rules of West Berkshire's planning officers with confidence.
Areas We Cover
Our installation teams work throughout West Berkshire and North Hampshire, covering:
- Newbury Town: Thatcham, Greenham, Wash Common, Speen.
- West Berkshire: Donnington, Cold Ash, Hungerford.
- North Hampshire: Highclere, Woolton Hill, Kingsclere, Tadley.
Ready to Quiet Your Home?
Get a free, detailed quote. Honest advice on 44mm vs 28mm options.
Start Your QuoteTriple Glazing FAQs
Yes, but only if we use the right glass specification. Standard triple glazing (3 equal panes) can create 'resonance', vibrating with traffic noise. For A34 noise, we specify Asymmetric Panes (different thicknesses) or Acoustic Laminated Glass to physically disrupt sound waves.
This is actually a good sign! It means the triple glazing is keeping the heat inside your house so effectively that the outer pane of glass is cold (matching the outside air). On crisp autumn mornings, this causes dew to form outside, just like on your car windscreen.
Yes, it is approx 50% heavier than double glazing. This means you cannot just put triple glass into old frames. We use reinforced profiles and heavy-duty "Mega-Egress" hinges designed to carry the weight effortlessly for decades.
Slightly. The extra pane reflects a little more natural sunlight than double glazing. This means slightly less "free heat" in winter, but it also helps prevent overheating in summer conservatories or south-facing rooms.
If you are looking for financial payback via energy bills, probably not (it can take 40+ years). But if you are looking for a warmer home with no cold spots, no drafts, and zero internal condensation, the comfort factor is immediate and unbeatable.
Most modern and post-war homes are perfectly suitable. However, if you have very narrow window reveals or are in a listed building, standard triple glazing frames may be too thick. We can conduct a free survey to check compatibility.
📚 Learn More from the Experts
Triple Glazing Prices Newbury
We understand that cost is a major factor. Whether you are upgrading a Victorian terrace in West Mills or a modern detached home in Wash Common, we believe in transparent pricing without the hassle.
📞 Speak to an Expert (No Pressure)
Our team is salaried, not commission-based, so you will never face a “hard sell.” If you are unsure if triple glazing is right for your property, just ask.
Call us on 01264 359355 or email [email protected].
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