ROOF GLAZING SYSTEMS

Roof glazing

High-performance rooflights, glass roofs and automated glazing systems, made to measure for your project.

Bespoke made to order

Seven roof glazing systems

Design, supply & installation

Southern England coverage

Bring natural light in from above

Our bespoke roof glazing systems combine high-performance glass, minimal framing and flexible configurations to bring more natural light into extensions, renovations and architectural spaces. From fixed rooflights to automated opening systems and large structural glass roofs, each solution can be tailored around the individual project.

Compare roof glazing systems

Choosing a roof glazing system for your home or development involves more than aesthetics, with performance, efficiency, structural requirements and compliance all playing a key role.

Sieger AllGlass rooflight system

A minimal fixed rooflight with concealed fixings, thermally broken framing, a typical U-value of 1.4 W/m²K and pitches from 5° to 60°.

System type

Flat fixed rooflight

Maximum size

2m × 1m rectangular

Glazing

Double glazed

HERA automated sliding rooflight box system

An automated sliding box rooflight with an 88mm sightline, smart controls and options for sliding, biparting and rooftop access.

System type

Automated sliding box

Maximum size

Up to 2m × 3m × 6m

Glazing

nsulated safety glass

MARS automated sliding rooflight system

A large automated sliding rooflight for daylight, ventilation and open-air living, with biparting and bespoke configurations available.

System type

Automated sliding rooflight

Maximum size

Up to 4m × 6m

Glazing

Insulated safety glass

ARES automated rising rooflight system

A thermally broken automated rooflight for ventilation or roof access, with opening angles up to 85° and smart control options.

System type

Automated rising rooflight

Maximum size

Project dependent

Glazing

Up to 41.5mm

Invisio rooflight system

A minimal structural glass roof system with Uw values around 1.2 W/m²K and options for flat, raked and multi-pane designs.

System type

Structural glass rooflight

Maximum size

1.5m × 3m per panel

Glazing

Double or triple

40 lantern rooflight system

A slim aluminium roof lantern with 40mm framing, Uw values from 0.7 W/m²K and bespoke configurations for larger openings.

System type

Roof lantern

Maximum size

Up to 5m wide

Glazing

Double or triple

Legacy conservation rooflight system

A super-flush conservation rooflight for heritage projects, suitable for pitches from 15° to 60° with optional traditional glazing bars.

System type

Conservation rooflight

Maximum size

1.5m × 3m per pane

Glazing

Insulated glass

System comparison	AllGlass	HERA	MARS	ARES	Invisio	40 Lantern	Legacy
System type	Flat fixed	Sliding box	Sliding	Rising / venting	Structural	Lantern	Conservation
Maximum size	2m × 1m	Up to 2m × 3m × 6m	Up to 4m × 6m	Project dependent	1.5m × 3m per panel	Up to 5m wide	1.5m × 3m per pane
Thermal performance	U-value 1.4 W/m²K	Thermally broken	Thermally broken	Thermally broken	Uw ~1.2 W/m²K	Uw from 0.7 W/m²K	Thermally broken
Operation	Fixed	Automated sliding	Automated sliding	Automated rising	Fixed	Fixed	Fixed
Roof pitch	5°–60°	Project dependent	Project dependent	Project dependent	Flat / raked	Project specific	15°–60°
Glazing	Double	Insulated safety	Insulated safety	Up to 41.5mm	Double / triple	Double / triple	Insulated
Automation	No	Yes	Yes	Yes	No	No	No
Best suited to	Flat roofs	Roof access	Large openings	Ventilation	Glass roofs	Extensions	Heritage projects

Roof glazing for every application

From simple flat rooflights and traditional roof lanterns to large structural glass roofs and fully automated opening systems, our roof glazing can be configured around the architecture and practical requirements of your project. Bespoke dimensions, glass specifications, opening mechanisms and frame details provide the flexibility to maximise daylight while achieving the required thermal and structural performance.

Performance without compromise

Our roof glazing systems combine thermally broken construction, high-performance insulated glass and carefully engineered support details to provide natural light without compromising thermal comfort or structural performance. Fixed, opening and automated systems can all be specified around the individual demands of the project.

From

40mm

lantern framing

From

0.7 Uw values

Up to

6m

rooflight length

Opening up to

85°

roof access

Double or

triple

glazing

Who we can help

For homeowners

Bespoke roof glazing that brings more natural light into your home while maintaining comfort and performance.

For architects

Bespoke roof glazing with flexible configurations, minimal detailing and technical support for architectural projects.

For builders & developers

Bespoke roof glazing with reliable performance, flexible specifications and support from design through to installation.

Roof glazing in real homes

August, 2026

Bosham

July, 2026

Burdon Lane

July, 2026

Finnmoor

July, 2026

Rosegarth

July, 2026

Bentley Manor

July, 2026

Hatcham Park Road

Our easy 5-step process

1. Consult

Discuss your project
and objectives

2. Specify

Choose the right system
and configuration

3. Survey

Accurate site survey
and measurements

4. Manufacture

Precision engineering
in our UK factory

5. Install

Expert installation
by our own team

Serving the home counties & the south-west of England

Local expertise, fast response and nationwode peace of mind.

Serving the home counties & the south-west of England

Local expertise, fast response and nationwode peace of mind.

FAQs

Find answers to some of the most common questions about our roof glazing systems.

What types of roof glazing are available?

Sieger offers fixed flat rooflights, automated sliding and rising rooflights, structural glass roofs, slim roof lanterns and conservation rooflights for contemporary and traditional properties.

What is the difference between a rooflight and a roof lantern?

A rooflight generally uses flat or shallow-pitched glazing installed within the roof, while a roof lantern projects above the roofline using multiple glazed faces to bring light into the space from several directions.

Are rooflights energy efficient?

Yes. Sieger roof glazing systems use insulated glazing and thermally broken construction, with selected systems achieving Uw values from 0.7 W/m²K

Can rooflights be opened for ventilation?

Yes. Automated systems such as ARES and MARS can provide controlled ventilation, with wall switches, remotes and smart automation available depending on the system.

Can roof glazing be used on heritage properties?

Yes. The Legacy Conservation Rooflight is specifically designed for sensitive, heritage and listed-building applications, with optional glazing bars available for a more traditional appearance.

Can roof glazing be made to measure?

Yes. Sieger roof glazing systems can be specified around the dimensions, pitch, glass requirements, opening method and architectural details of each individual project.