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Same-Week Dispatch
4.3/5 from 27+ reviews

Double Glazing Repairs

Replacement sealed units for double glazing repair work. Misty windows, failed seals, cracked panes — we supply the exact unit your customer needs, manufactured to order and dispatched same-week. BS EN 1279 certified with a 10-year guarantee.
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FENSA Registered
BS EN 1279 Certified
Nationwide Delivery
Same-Week Dispatch
4.3/5 rating from 27+ reviews
Trade Pricing Available

Repair jobs need precision, speed, and reliability. A wrong-sized unit means a wasted visit, an unhappy customer, and a hit to your reputation. We get it right first time.

Expert Glazing, Done Right

We're not a national call centre. We're local glaziers who take pride in every job.

Made to Exact Measurements

Every sealed unit is manufactured to your specific dimensions — not pulled from generic stock. Tight tolerances mean clean installations with proper gasket compression, every time.

Same-Week Dispatch

Standard sizes dispatch within the same working week. No long lead times holding up your repair schedule. Bespoke sizes and shapes within 5-7 working days.

Single Unit Orders Welcome

Unlike some suppliers, we don't have minimum order quantities. Need one replacement unit for a single repair job? No problem. Need fifty for a housing association contract? Same competitive pricing.

10-Year Seal Guarantee

Every unit carries our 10-year warranty. If it mists up within the warranty period, we replace it free of charge. That's the confidence to back your repair work without reservation.

Match or Upgrade Specification

We can replicate the original unit exactly, or upgrade to a higher specification — better U-values, Low-E coatings, argon fill. Give your customers options and increase your average job value.

Understanding what's failed helps you recommend the right replacement. Here are the most common sealed unit failures and what to look for during assessment.

Signs Your Double Glazing Needs Attention

Catching problems early saves money and prevents bigger issues. Here are the telltale signs your windows need professional attention.

⚠️ Noticed any of these issues? Do not wait - small problems become expensive repairs. Get a free assessment today.

Expert Knowledge

Double Glazing Repairs: The Trade Professional's Guide

Sealed Unit Replacement: The Core of DG Repair

The vast majority of double glazing repair work comes down to one thing: replacing failed sealed units. Whether the symptom is misting, condensation, cracked glass, or poor thermal performance, the solution is almost always a new sealed unit installed into the existing frame.

This is excellent news for trade professionals. It's a high-volume, repeatable job with strong margins. The frame is retained, so the work is non-structural and typically completed within 30-60 minutes per window. Customer satisfaction is high because the result is immediately visible — clear glass replacing foggy, misted panes.

Matching Existing Units

For repair work, the replacement unit usually needs to match the overall thickness of the original. Common configurations are 24mm (4-16-4), 28mm (4-20-4), and 20mm (4-12-4). When measuring, always confirm the cavity width — this determines gas fill volume and spacer bar specification.

Where the original specification is unknown, measure the overall unit thickness and individual pane thickness. Our technical team can work backwards from these measurements to recommend the correct spacer bar width and glass configuration.

Upgrading During Repair

Repair visits are an opportunity to upsell specification upgrades. If the original unit was basic clear glass, offer a Low-E coated replacement with argon fill. The cost difference to you is modest, but the value to the customer is significant — better thermal performance, lower energy bills, and improved comfort. Many customers are happy to pay a premium for an upgrade when the frame is already being worked on.

Common Frame Types

uPVC frames account for roughly 85% of domestic double glazing repair work. Bead removal and re-glazing is straightforward with the right tools. Aluminium frames require care — older thermally-broken systems may have non-standard bead profiles. Timber frames often use putty or timber beads, and you should inspect for wood rot while the glazing is out.

Building Regulations Considerations

Like-for-like replacements (same size, same opening) don't normally require Building Control notification. However, if you're upgrading the unit specification, document the improvement — it adds value to the property and demonstrates compliance with Part L. We provide U-value certificates for all units on request.

Always check gasket condition when replacing a sealed unit. A new unit in worn gaskets won't perform — air infiltration around the perimeter will negate the thermal benefits of the new glass. We stock a range of standard gasket profiles, or measure and order bespoke if needed.

Simple, fast ordering designed for trade professionals who need reliable supply without the hassle.

How Our Service Works

From first contact to finished job, we make the whole process straightforward and stress-free.

Measure the Unit

Measure width, height, and overall thickness of the failed unit. Note glass type if visible (clear, Low-E, obscure) and any special requirements (toughened, laminated, Georgian bar).

Submit Your Order

Order via our trade portal, email, or phone. Provide dimensions and glass specification. Our team will confirm the order and provide a quote — usually within the hour.

We Manufacture

Every unit is made to your measurements. Standard sizes are dispatched same-week. Non-standard sizes, shapes, or specifications within 5-7 working days.

Delivery to You

Tracked delivery to your workshop, trade counter collection point, or direct to site. Glass is securely packaged with edge protection for safe handling.
Whatever the frame type, glass specification, or problem — we manufacture the replacement unit you need.

What We Can Help With

From quick repairs to complete replacements, we handle all residential and commercial glazing needs.

Standard Replacement Units

Like-for-like sealed unit replacements in all standard thicknesses: 20mm, 24mm, 28mm, and 32mm. Clear, Low-E, tinted, or obscure glass options.

Energy Upgrade Units

Replace basic clear units with A-rated energy efficient glass. Low-E coating plus argon fill delivers U-values as low as 1.1 W/m²K — a genuine upgrade your customers will feel.

Acoustic Glass

Specialist acoustic sealed units using asymmetric pane thicknesses and laminated glass. Ideal for properties on busy roads, near airports, or in noisy urban areas.

Safety & Security Glass

Toughened and laminated options for doors, low-level glazing, and overhead panels. We supply to BS 6206 and BS EN 12600 classification standards.

Obscure & Decorative Glass

Privacy glass in multiple obscure patterns, sandblasted finishes, and decorative options. Popular for bathrooms, front doors, and side panels.

Georgian Bar Units

Sealed units with internal Georgian bars (astragal bars) in white, gold, or woodgrain finishes. Replicate traditional styling without external bar maintenance.

Not sure what you need? No problem - we will assess and advise. No obligation, no pressure.

Trusted by Tradespeople & Homeowners

What Our Customers Say

4.3 ★ from 27 Google reviews

  • 15+

    Years in Business

  • 10,000+

    Sealed Units Supplied

  • 27+

    Google reviews

  • ★★★★★
    Huge shout-out to Ollie and the team! ⭐⭐⭐⭐⭐ ​Our patio door went from being completely stuck and impossible to lock to sliding like a dream. Ollie diagnosed the issue (collapsed wheels) and his team squeezed us in despite a packed schedule. ​The difference is night and day—it literally feels like it’s sliding on air now. If you’re looking for reliable, expert servi...

    Susan Passmore

  • ★★★★★
    We had glass panes and hinges replaced throughout the house and a new set of french doors. Ollie and everyone that came to fit were friendly, professional, tidy and considerate. The work has been carried out to excellent quality - especially the french doors which look fantastic.

    Lucy Bennett

  • ★★★★
    Complex issue with a broken non-standard hinge on 1st floor window. Ollie was the only one of over 10 other firms I contacted who said they could do the job. It took a while, but Ollie managed to source a replacement part and completed the job to a high standard. Very happy with the work done and have asked him to do another job following the good experience.

    Dave Edwards

Common trade questions about replacement sealed units. Our technical team is available for specification advice on any job.

Frequently Asked Questions

Everything you need to know about our double glazing repair and replacement services across the South West.

  • Yes. Provide the overall thickness and pane measurements, and we'll manufacture a like-for-like replacement. If you can identify the glass type (clear, Low-E, tinted), we'll match that too. If not, we can advise based on the unit's age and appearance.

  • One unit. We have no minimum order quantity. Single units for one-off repairs are welcome alongside bulk orders for contract work. The same quality and turnaround applies regardless of order size.

  • Standard sizes from stock: same-week dispatch. For genuinely urgent jobs, call our trade team directly — we can often expedite to next-day dispatch for standard configurations.

  • Yes. We manufacture sealed units for all frame types. For aluminium frames with non-standard bead profiles, provide the bead dimensions so we can ensure correct unit thickness. For timber frames, specify whether the unit will be putty-glazed or bead-glazed.

  • Absolutely — and we encourage it. Upgrading from basic clear glass to Low-E with argon fill costs relatively little extra but delivers a genuine performance improvement. We provide U-value data so you can demonstrate the upgrade value to your customer.

  • Every sealed unit has a 10-year warranty covering seal failure and gas loss. If a unit develops misting within the warranty period, we replace it at no charge. Warranty documentation is provided with every order.

  • Yes, on request. U-value certificates are available for all sealed units, which is useful for demonstrating Building Regulations compliance and for customers who want documentation of the upgrade.

  • Store upright on a clean, flat surface in a dry area. Don't stack units flat — this puts stress on the spacer bar seal. Avoid storing in direct sunlight for extended periods before installation. Use within 30 days of delivery for best results.

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Need Replacement Sealed Units?

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