Buy Double Glazed Units Online – Made to Measure
Enter your dimensions for an instant price. 8 glass types, free UK delivery, 5–7 day turnaround — no phone calls, no waiting.
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Frequently Asked Questions
How do I measure for a replacement double glazed unit?
Always measure the glass itself, not the frame. Take three measurements for both width and height and use the smallest. Our min is 150 × 150mm, max is 2500 × 2500mm. See our full measuring guide for step-by-step photos.
How much do replacement double glazed units cost?
Units start from £34.99 for standard clear 4mm/4mm. Prices scale by glass type and size. A-rated Low-E from £41.99, toughened from £54.99, acoustic from £89.99. All prices include VAT and free UK delivery.
How long does delivery take?
All made-to-measure units are manufactured and delivered within 5–7 working days across mainland UK. Delivery is free on all orders. You'll receive a tracking notification once dispatched.
Are units argon gas filled as standard?
Yes — all units are argon gas filled at no extra charge. Argon is denser than air, reducing heat transfer and improving thermal performance significantly over air-filled units.
What's the difference between A-rated and standard units?
Standard units use clear float glass. A-rated units have a Low-E coating that reflects heat back into the room — U-value typically 1.0–1.2 W/m²K vs 2.8 for standard. Recommended for energy-efficient refurbishments and new builds.
Do you offer a guarantee?
Yes — all units come with a 10-year guarantee against seal failure and misting. If your unit fails due to a manufacturing defect within 10 years we'll replace it free of charge.
Can I order just one unit?
Absolutely — no minimum order quantity. Order a single unit or mix different sizes and glass types in the same order using the additional notes field.
What spacer bar colours are available?
Silver (standard), black, bronze, white and gold. All are warm-edge spacers for better thermal performance. Black is most popular for modern aluminium frames; silver suits white uPVC.