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Bristol's #1 Rated Glaziers
4.3/5 from 27+ reviews

Conservatory Roof Conversions — Equinox Solid Tiled Roofs

Stop losing heat and money. FENSA registered experts fix your windows fast - with a 10-year guarantee.

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Why Bristol Chooses Us

Expert Glazing, Done Right

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

FENSA Registered

Member of FENSA — the government-authorised Competent Person Scheme for replacement glazing. Every install self-certified to Building Regs Approved Document L; no separate building-control notification needed.

BS EN 1279 Certified

Every sealed unit ships with a UKCA mark and a Declaration of Performance compliant with BS EN 1279 parts 1, 2, 3, 5, and 6 — the European insulating glass standards covering gas fill, durability, and structural integrity.

10-Year Warranty

Manufacturer warranty on edge-seal integrity (BS EN 1279-2 accelerated weathering tested). Argon retention warranted to 80% of initial fill at 10 years. We replace failed units without quibble within the warranty window.

South-West Specialists

Bristol, Bath, Gloucestershire, and Somerset — same-week dispatch on stock units, same-day surveys for emergencies. No national call-centre handoffs.

Honest Online Pricing

Configurator returns a real price for your exact spec — no "ring for quote" runaround. Trade accounts unlock tier pricing live. Net 30 terms on approved accounts.

Trade-Account Ready

Net 30, volume discount tiers (5 / 20 / 50+ units), bulk dispatch on schedule, dedicated trade contact 08:00-18:00. Apply at our trade page.

Warning Signs

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.

Misting Between Panes

Visible fogging or condensation inside the sealed cavity (not on the room-side surface) means the edge seal has failed and moisture has entered. The argon gas is also gone — the unit's U-value has dropped from 1.4 to ~2.8 W/m²K. Replace, don't repair.

Cold Drafts Near Windows

Cold zones near a closed window usually mean a failed perimeter seal between glass and frame, or a degraded gasket. Easy to fix on most frames without replacing the glass — but worth a survey to confirm it's not also an IGU failure.

Sudden Spike in Heating Bills

If your bill jumped without weather or tariff changes, check whether sealed units have failed. A single misted unit on a 4-bed home typically adds £100-200/year to heating cost via lost insulation.

Visible Cracks or Chips

Even hairline edge cracks let moisture in and trigger seal failure within months. Cracks in safety-glazing locations (low-level, doors, bathrooms) are a Building Regs Document N compliance issue — replace promptly with BS EN 12150 toughened equivalent.

Heavy Room-Side Condensation

Streams of water on the inside of the glass on cold mornings usually mean the room-side glass surface is too cold (poor U-value glazing) combined with high indoor humidity. A-rated low-E units (U=1.1) typically eliminate this; the condensation calculator identifies the cause.

Sticky or Misaligned Sashes

Sashes that catch, jam, or won't lock are usually hinges, friction stays, or sash weights that have worn — often fixable without replacing the glass. But check the frame for rot or PVCu reinforcement failure while diagnosing; bad frames need replacement before glass.

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

Expert Knowledge

Understanding Double Glazing Problems

Double glazing works by trapping a layer of air or gas between two panes of glass, creating an insulating barrier that keeps heat in and cold out. When this seal fails, moisture enters the gap and the insulating properties are compromised.

Why Do Sealed Units Fail?

The average lifespan of a sealed unit is 15-25 years, though this varies based on quality, installation, and exposure. The main causes of failure include:

  • Age and weathering - The seal naturally degrades over time, especially on south-facing windows exposed to more UV radiation
  • Poor original installation - If drainage channels are blocked or the unit was fitted incorrectly, water can pool and accelerate seal failure
  • Temperature fluctuations - Repeated expansion and contraction stresses the seal, particularly in conservatories
  • Physical damage - Even minor impacts can compromise the edge seal without cracking the glass

Repair vs Replace: Making the Right Choice

Many homeowners assume failed double glazing means replacing the whole window. This is rarely necessary. If your frames are structurally sound and not warped or damaged, replacing just the sealed unit is the sensible choice.

However, if your frames are over 20 years old, showing signs of rot (timber) or becoming brittle (early UPVC), full replacement may be more economical long-term. We will explain your options clearly so you can make an informed decision.

The good news: in most cases, only the glass unit needs replacing - not the entire frame. This typically saves 50-70% compared to full window replacement.

Simple Process

How Our Service Works

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

Tell us what you need

Call the helpline, fill the quote form on this page, or use the online configurator for instant pricing. We need: rough location, glazing problem or spec, and any photos you have of the issue or frame.

Free survey or remote spec

For most jobs we book a free no-obligation survey within 2 working days. For straightforward like-for-like replacements we can spec from photos + rebate measurements — no visit needed.

Fixed-price quote within 24 hours

You get a fixed price for the work — labour, materials, units, disposal, and FENSA certification — in writing. No surprise add-ons on the day. Trade accounts see tier pricing live in the configurator.

Manufacture to spec

Units are made to spec by FENSA-registered manufacturing partners. Stock-size dispatch 5-7 working days; custom / shaped / oversized 10-14 working days. We schedule install around your build programme.

Install + sign-off

Single-visit install in most cases. We FENSA-certify the work to Building Regs Approved Document L and post your certificate within 30 days. 10-year warranty active from install date.

Our Services

What We Can Help With

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

Sealed Unit Replacement

Like-for-like swap of any failed (misted, blown, cracked) IGU. We measure, manufacture to spec, and refit — usually in a single visit. Frame stays, glass changes.

Full Window Replacement

When frames are rotten, twisted, or beyond viable repair, we install complete window units — PVCu, aluminium, or timber. FENSA-certificated; Document L compliant; A-rated glazing standard.

Safety & Security Glazing

Toughened (BS EN 12150) or laminated (BS EN 14449) units for critical locations — French doors, low-level windows, bathrooms, balustrades. Anti-bandit P-rated (BS EN 356) available for security-priority installs.

A-Rated Energy Upgrade

Replace 1990s air-filled units with 28mm Low-E argon (U=1.1 W/m²K, WER A). Typical EPC uplift 5-12 points; lower heat-pump flow-temp requirements; immediate winter comfort win.

Trade & Bulk Supply

Supply-only sealed units (any spec, any size) for builders, glaziers, and installers. Net 30, tiered volume discount, scheduled site delivery. Apply for a trade account.

Emergency Glass Repair

Boarded-up, broken, or fall-out-risk glazing fixed same-day across Bristol and the South West. Toughened or laminated replacement to original spec; insurance-claim documentation provided.

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
  • ★★★★★
    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 Questions

Frequently Asked Questions

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

  • No — not in any reliable, durable way. "Defogging" services that drill the glass and inject desiccant void manufacturer warranties, never restore the argon fill, and the U-value stays degraded. The cost-effective fix is replacement of the IGU; the frame stays in place.

  • UK industry average is 15-25 years before edge-seal failure causes misting. Modern warm-edge spacers with butyl + polysulphide secondary seal commonly last 20-30 years. Our manufacturer warranty covers 10 years on seal integrity and argon retention to 80% of initial fill.

  • Replacement glazing in an existing frame is FENSA-self-certifiable — no separate Building Control notification required when fitted by a FENSA-registered installer (us). New windows in significant extensions or new builds need building control sign-off on Part L (energy) and Part N (safety glazing) compliance.

  • Standard double-glazed units: 5-7 working days from survey. A-rated low-E / safety-toughened: 7-10 working days. Shaped, oversized (>1500mm any side), or specialist laminated: 10-14 working days. Emergency same-day boarding for broken glazing.

  • Toughened (BS EN 12150) is the default safety spec in walls and doors at critical locations under Approved Document N — granular break, low laceration risk. Laminated (BS EN 14449) is required for overhead glazing (BS 5516), balustrades, and security applications — the PVB interlayer holds fragments in place. Most residential critical locations are toughened; conservatory roofs are laminated.

  • Yes — typical savings on UK 3-bed homes upgrading from first-generation DG to 28mm Low-E argon (U=1.1 W/m²K) are £80-180/year depending on heating fuel and exposure. Larger savings on cold-climate orientations (north-facing, exposed). The energy calculator gives a per-home estimate.

  • Yes. Builders, glaziers, FENSA fitters, and developers can apply for a trade account at our trade page. Approved accounts unlock tier pricing (5 / 20 / 50+ units), net 30 days, dedicated trade contact, and scheduled bulk delivery. Apply via trade@panerelief.co.uk.

  • Photograph the unit, edge-stamp, and any visible defect; email service@panerelief.co.uk with your order reference. Failures within the 10-year seal warranty get priority replacement (3-5 working days dispatch). We don't charge for in-warranty replacements; site re-fit is a separate quote.

Explore More

Related Services

We offer a complete range of glazing services across Bristol. See how else we can help.

Misty Windows

Sealed units fogging or condensating between the panes? See the misty-windows service page for diagnosis, replacement options, and warranty cover.

Learn more

Failed Seals

Edge-seal failure is the most common reason a sealed unit needs replacing. Read the failed-seals guide for what to look for and how it gets fixed.

Learn more

Safety & Security Glass

Toughened, laminated, and anti-bandit P-rated glass — what each is for, what Building Regs require where, and how to pick the right spec.

Learn more

Energy-Rated Glass Units

A-rated low-E units, U-value math, BFRC ratings, and how to upgrade from 1990s air-filled glazing to a Building Regs Part L-compliant spec.

Learn more

Acoustic Glass Solutions

Live near a road, railway, or flight path? Asymmetric panes + laminated PVB interlayer can drop external noise by up to 44 dB Rw. Spec guide and decision tree.

Learn more

Conservatory Reglazing

Conservatory roof and side-panel replacement — solar-control, self-cleaning, and laminated overhead options. Same-week dispatch on stock sizes.

Learn more

Ready to Get Started?

Get your free, no-obligation quote today. Most quotes delivered within 24 hours.

Request Free Quote Call 0117 330 3057

Prefer to talk? Call us on 0117 330 3057