Skip to main content
Safety Glass Standard
4.3/5 from 27+ reviews

Composite Doors

Replacement sealed units for composite door glazing. Composite doors use toughened or laminated safety glass in a wide range of panel configurations — full-length, half-panel, quarter-light, sidelights, and fanlights. We manufacture exact-size replacement units for every composite door style, with safety glass compliance as standard.
Get Free Quote Now
FENSA Registered
BS EN 1279 Certified
Nationwide Delivery
Same-Week Dispatch
4.3/5 rating from 27+ reviews
Trade Pricing Available

Rockdoor, Solidor, Endurance, Doorco, Composite Door Group, Apeer — we supply replacement glass for all major composite door manufacturers.

Expert Glazing, Done Right

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

Safety Glass Standard

Every composite door unit is manufactured with toughened or laminated safety glass to BS EN 12600. It's not an optional extra — it's built into every quote. Class 1 impact rated as standard.

Decorative Options

Composite doors often feature decorative glass — bevels, fused glass clusters, leaded designs, and coloured panels. We can match most popular patterns or supply clear/obscure as a simpler alternative.

Cassette vs Direct Glazed

Most composite doors use a cassette system — the glass is mounted in a removable frame that clips into the door. Measure the cassette, not the door. Direct-glazed doors require edge-to-edge unit measurement.

5-7 Day Turnaround

Decorative and non-standard composite door glass within 5-7 working days. Standard clear and obscure toughened panels dispatched faster.

10-Year Warranty

Full warranty on seal integrity and safety compliance. Every unit kitemarked.

Composite doors have specific glazing requirements that differ from window glass. Check these before ordering.

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

Composite Door Glazing: Specification Guide

Composite Door Construction

Modern composite doors have a solid timber core or foam core with GRP (glass-reinforced plastic) skins. The glass panels sit in cassettes — removable frames that clip or screw into apertures in the door slab. This makes glass replacement relatively straightforward: remove the cassette, swap the glass, refit the cassette.

Safety Glass Requirements

BS EN 12600 defines three impact classes. For domestic doors:

Class 1 (toughened) — Shatters into small granular pieces on impact. The most common choice for composite doors. Cheapest safety option.
Class 2 (laminated) — Cracks but holds together on the interlayer. Better security (intruder can't easily reach through). Better acoustic performance. Premium option.
Class 1+2 (toughened-laminated) — Maximum security. Both toughened and laminated properties. Used in high-security doors and commercial applications.

Decorative Glass Options

Composite doors are a style statement — the glass is often the centrepiece. Common decorative options include:

Bevelled clusters — Geometric patterns of bevelled glass pieces fused onto a clear or obscure base. The most popular decorative style. Available in hundreds of designs.
Leaded glass — Lead came strips in traditional patterns. Available as genuine leaded or applied lead strip (cheaper, lighter, similar visual).
Coloured glass — Coloured film or fused glass elements for accent panels. Popular in contemporary door designs.
Etched / sandblasted — Patterns etched or sandblasted onto the glass surface for a frosted decorative effect.

Sidelight and Fanlight Panels

Many composite door installations include matching sidelights (vertical panels beside the door) and fanlights (horizontal panels above). These use the same cassette system and can be replaced independently. If replacing a broken sidelight, match the glass type and pattern to the door panel for visual consistency.

Composite door glass replacement has more variables than window glass — decorative patterns, cassette types, obscure levels, letterbox positions. Take detailed photos of the cassette (both sides), the decorative pattern, and any identifying labels on the door. This saves phone calls, prevents ordering errors, and speeds up the quote. One clear photo is worth ten minutes of description.

Measure the cassette, identify the glass type, order with confidence. We handle the safety compliance automatically.

How Our Service Works

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

Remove and Measure the Cassette

Pop the cassette out of the door. Measure the glass rebate inside the cassette. Note the gasket type and any decorative elements. Photograph both sides.

Identify the Glass Type

Clear, obscure, or decorative? If decorative, photograph the pattern and note any manufacturer markings. Tell us the door brand if known — it helps us match the pattern.

Order

Send us the cassette measurements and photos. We confirm specification, safety glass type, and pricing. Trade accounts get 30-day terms.

Refit the Cassette

New unit arrives within 5-7 days. Remove old glass from cassette, fit new unit with correct gaskets, clip cassette back into door. Job done — typically 20-30 minutes.
From simple toughened replacements to decorative feature panels — every composite door glass configuration available to order.

What We Can Help With

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

Toughened Safety Glass

Clear or obscure toughened glass to BS EN 12600 Class 1. The standard safety option for most composite door replacements. All sizes manufactured to order.

Laminated Security Glass

PVB laminated safety glass for enhanced security. Holds together on impact — intruder can't reach through. Better acoustic performance than toughened.

Decorative Feature Glass

Bevelled clusters, leaded designs, etched patterns, and coloured glass. We match most popular composite door patterns or create custom designs.

Triple Glazed Door Panels

Premium triple glazed door units for maximum security and thermal performance. 36-44mm configurations for Solidor, Endurance, and similar premium doors.

Sidelights & Fanlights

Matching glass panels for door sidelights and fanlights. Same decorative pattern, same glass specification — visual consistency across the whole door set.

Letterbox Aperture Units

Sealed units with precision letterbox cutouts. Provide the cutout dimensions and position — we manufacture the unit with the aperture built in.

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 questions about replacing glass in composite doors.

Frequently Asked Questions

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

  • Yes. Building Regulations (Approved Document K) require all glazing in doors and within 300mm of a door to be safety glass to BS EN 12600. We only supply safety-rated glass for composite doors — toughened (Class 1), laminated (Class 2), or toughened-laminated (Class 1+2).

  • In most cases, yes. Send us a photo of the existing pattern and we'll identify it. We stock tooling for hundreds of popular bevelled, leaded, and etched designs. If the exact pattern is discontinued, we'll recommend the closest match and send you a preview before manufacturing.

  • Most cassettes are held in by clips or a small number of screws accessible from the inside face of the door. Release the clips or remove the screws, and the cassette pops out as a complete unit. If it's sealed with mastic, carefully cut the mastic line with a sharp knife first.

  • If the cassette and door aperture are deep enough (typically 36mm+), yes. Many premium composite doors (Solidor, Endurance, Apeer) are designed for triple glazed panels. Check the cassette depth before ordering — we'll confirm compatibility.

  • We manufacture sealed units with precision letterbox apertures. Provide the cutout width, height, and position (distance from each edge). The aperture is cut during manufacture and the edges are sealed — no site cutting needed.

  • 5-7 working days for decorative and pattern-matched glass. Clear and obscure toughened panels can be faster. Emergency replacements available for broken door glass — call our trade team to discuss.

Explore More

Related Services

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

Safety & Security Glass

Toughened and laminated glass for all door applications.
Learn more

Privacy Glass

Obscure glass options for doors requiring privacy.
Learn more

Door Glass Replacement

Complete door glass replacement service and information.
Learn more

Window Replacement Glass

Full range of replacement sealed units for windows.
Learn more

Order Composite Door Glass

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