INSULATED FLAT ROOF SYSTEM

FOR CONSERVATORIES
AND EXTENSIONS

Trade-Only Supply | Precision-Engineered Timber Flat Roof Kits | Optional S1 Roof Lantern

High-Performance Flat Roof System for Conservatories & Extensions

WarmerBeam is a precision-engineered timber flat roof system designed for conservatories, extensions and suitable retrofit projects. The lightweight roof construction combines C24 timber I-Beams, integrated insulation and EPDM waterproofing to provide a coordinated roof system for trade installers.

Manufactured to a defined project specification, WarmerBeam brings the structural framework, thermal components and weatherproofing together as a single roof system. Structural options are available for different roof sizes and requirements, with the system designed to provide a practical installation solution without relying on extensive on-site adaptation.

The roof can also be specified with the S1 Aluminium Roof Lantern where additional natural light is required. For retrofit projects, WarmerBeam can be used when upgrading existing conservatory roofs, subject to assessment of the supporting structure and individual project requirements.

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Exceptional Thermal Performance

We engineer every roof to deliver exceptional thermal efficiency, helping conservatories stay cooler in summer and warmer in winter.

Engineered Timber Strength

We build every roof around high-performance structural I-beams manufactured from C24 timber for exceptional strength and durability.

Ideal for Retrofit Projects

Our lightweight roofing solution installs easily onto existing frames, making it ideal for conservatory upgrades and retrofit projects with minimal disruption.

Flat Roof System for Conservatories

WarmerBeam is designed for conservatory projects where a lightweight, insulated flat roof is required, including new installations and suitable replacement projects. The engineered timber construction can be specified around the requirements of the existing or new supporting structure, subject to the appropriate structural assessment.

For conservatory roof replacements, WarmerBeam provides an alternative to retaining an existing glass or polycarbonate roof, with insulation and waterproofing incorporated into the engineered roof construction. This makes it suitable for installers upgrading existing conservatory structures where a modern flat roof solution is required.

Flat Roof System for Extensions

WarmerBeam can be specified for single-storey extensions where an insulated, engineered flat roof is required. The timber construction provides a defined structural framework that can be designed around the dimensions and requirements of the individual extension project.

Structural options are available for larger roof projections and spans, allowing the roof construction to be specified around the requirements of the extension. The system combines the structural framework, insulation and waterproofing within a coordinated roof specification for trade installation.

For more detail on the construction principles, structural considerations and installation benefits of engineered timber flat roofs, see our guide to engineered timber flat roofs for trade installers.

Structural I BEAM Flat Roof System

Standard max projection – up to 5.5m
I Beam 300 upgrade – up to 7m projection
Structural Glulam eaves as standard with steel reinforcement option
Stylish S1 Roof lantern manufactured in-house
Kit form for quick and easy installation
Light enough to be retro fitted onto existing frames
Structural I beams consist of c24 timber with a 10 mm particle board

Find out how our engineered I-beam roof kits can help installers achieve faster, more efficient conservatory roof installations.

Discuss Your Flat Roof System Project. Speak to our technical specialists about your project, whether you’re planning a flat roof conservatory, a timber flat roof extension, or a replacement flat roof.

Call 01373 473 900

WarmerAluminium

S1 ROOF LANTERN

Create a greater sense of space with the WarmerAluminium S1 Roof Lantern. Its slim contemporary profile maximises natural light while complementing both modern and traditional properties.

We designed the external rafter cappings and slimline ridge to create a cleaner, more refined appearance than bulky traditional roof lantern systems, giving homeowners more sky and less visible framework.

Frame Colour Options

7m

MAX EXTERNAL PROJECTION INCLUDING 400MM OVERHANG

Now even Stronger!

The I-Beam 300 timber I-Joist beams, which consist of C24 timber with a 10mm particle board web, can reach roof projection spans of max 7 meters without the need for additional support. The I-Beam 300 is lighter than conventional timber trusses and steel, ensuring less pressure on the supporting walls and frames.

durable EPDM rubber membrane

WarmerBeam flat roof systems are finished externally with a durable EPDM rubber membrane, providing a long-lasting, low-maintenance weatherproofing solution for conservatories and extensions.

Simple and easy to install
Little to no maintenance
Exceptional durability

Ask about our rubber membrane training

50 Years LIFE EXPECTANCY

What’s Included in the WarmerBeam Flat Roof Kit

WarmerBeam is supplied as a coordinated, pre-engineered flat roof kit, with the structural framework, insulation, waterproofing and associated components specified to suit the individual project. The system is manufactured to a defined specification to help installers work from a consistent roof design and streamline on-site assembly.

1. Structural Framework

Engineered C24 timber I-Beam joists with 10mm particle board webs
Structural Glulam eaves beam, with steel reinforcement where required
Wall plates and precision-cut filler blocks
Firring strips, 25 × 50mm battens and OSB outer decking
Fixings and structural joist hangers

2. Insulation and Internal Finish

Pre-installed honeycomb insulation
Foil-faced insulated plasterboard/PIR components
Insulated lantern upstand where required

3. Waterproofing and Roof Finishes

EPDM waterproofing membrane
EPDM adhesive and associated trims
Fascia and soffit components
Rainwater goods

4. Roof Lantern and Technical Information

WarmerAluminium S1 Roof Lantern, where specified
Structural assembly drawings and installation information

The exact kit specification depends on the individual project, including the roof dimensions, structural requirements and options selected.

What is provided in you Flat Roof System Kit

5 day turnaround

Our state-of-the-art software and machinery allow us to manufacture WarmerRoof tiled roof systems efficiently, helping us maintain a 5-day manufacturing turnaround.

Tested & approved

Structurally approved by independent specialist engineers.

Warranty

25-Year manufacturing warranty. 40 year tile manufacturers warranty.

Want to know more about the WarmerBeam Insulated Flat Roof system? Give our technical team a call.

01373 473 900 (ext 4)

FAQs – Flat Roof System

Can the WarmerBeam system be installed directly onto existing conservatory frames?

Yes. The WarmerBeam system is engineered to be lightweight, spreading loads evenly across existing frames and support structures. It is designed specifically as a low-disruption retrofit solution for older glass or polycarbonate roofs.

How does the system comply with Building Regulations?

Our timber roof kits are structurally tested by independent engineers to surpass standard thermal (U-value) and structural requirements across England and Wales. Full structural calculations and span tables are available upon request for submission to Building Control.

What is the WarmerBeam flat roof system?

WarmerBeam is a precision-engineered timber flat roof system for conservatories, extensions and suitable retrofit projects. The system combines engineered C24 timber I-Beams with insulation, structural decking and EPDM waterproofing, with additional components and options specified according to the individual project.

How quickly can a WarmerBeam roof be installed?

WarmerBeam is supplied as a pre-engineered, made-to-measure kit with components precision-cut for the individual project. This helps streamline installation on site and reduce labour time. Our current manufacturing turnaround is typically 5 days, subject to project requirements and confirmation.

What is the maximum span possible without adding extra structural support?

Our standard system achieves a maximum projection of up to 5.5 metres. For larger projects or grand extensions, we offer the I-Beam 300 upgrade. This advanced timber I-joist uses C24 timber with a 10mm particle board web, allowing roof projection spans of up to 7 metres, including a 400mm overhang, without the need for additional internal supports or bulky steel beams.

How does the S1 Roof Lantern integrate into the roof?

The roof is specifically engineered to integrate with our slimline WarmerAluminium S1 Roof Lantern. The kit includes a fully insulated lantern upstand to maintain thermal efficiency. Its ultra-slim profiles and discreet external rafter cappings help maximise natural light while creating a sleek, contemporary “more sky, less roof” aesthetic.

Can a flat roof be used to replace a conservatory roof?

Yes. WarmerBeam can be used for suitable conservatory roof replacement projects where the existing structure and supporting frame are appropriate. Its lightweight construction makes it particularly suitable for retrofit applications, with the system designed to minimise disruption during installation.

What type of insulation is used in the WarmerBeam roof?

The WarmerBeam kit incorporates pre-installed honeycomb insulation together with foil-faced insulated plasterboard to create a high-performance thermal envelope. The lantern upstand is also insulated to help minimise thermal bridging around the roof lantern.