INSULATED FLAT ROOF SYSTEM
FOR CONSERVATORIES
AND EXTENSIONS
Trade-Only Supply | Precision-Engineered Timber Kits with Integrated S1 Roof Lanterns
Engineered for rapid installation and maximum thermal efficiency. Deliver modern, energy-efficient living spaces with our WarmerBeam lightweight, fully compliant flat roof kit.
With unrivalled aesthetics and thermal efficiency, our system transforms tired conservatories and extensions into bright, usable living spaces. The addition of a sleek aluminium roof lantern maximises natural light, creating a spacious and inviting environment your clients will love. Ideal for homeowners upgrading an existing conservatory or planning a new extension, the system delivers a sleek, insulated roofing solution designed for year-round comfort. This approach reflects the wider shift towards modern flat roof systems for contemporary extensions in the UK. It’s particularly effective when used as part of a conservatory roof replacement, helping transform outdated spaces into modern, energy-efficient living areas.
Create a brighter, more open living space with our slimline aluminium roof lantern, designed to maximise natural light and complement both modern and traditional properties. From the outside, our discreet external rafter cappings and slimline ridge deliver a clean, contemporary finish that avoids the bulky appearance of conventional T-bar systems.
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
I BEAM
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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
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
S1 ROOF LANTERN
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
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
All flat roof conservatories and flat roof extensions are covered externally with a durable EPDM rubber membrane, complete with accessories for a long-lasting, low-maintenance roof solution.
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Simple and easy to install - Little to no maintenance
- Exceptional durability
What’s Included in the WarmerBeam Flat Roof Kit
1. Structural Framework
- Engineered I-Beam Joists (C24 timber with 10mm particle board web)
- Structural Glulam Eaves Beam (with optional steel reinforcement)
- Wall Plate & Precision-Cut Filler Blocks
- Firring Strips, Battens (25 x 50mm) & OSB Outer Decking
- Complete Fixings & Heavy-Duty Joist Hangers
2. High-Performance Thermal Envelope
- Premium Pre-Installed Honeycomb Insulation
- Foil-Faced Insulated Plasterboard (PIR)
- Insulated Lantern Upstand (eliminates thermal bridging)
3. Complete Weatherproofing & Drainage
- Durable EPDM Rubber Membrane (50-year life expectancy)
- Complete EPDM Adhesive & Trims Package
- Integrated Rainwater Goods, Soffit & Fascia Boards
4. Lantern & Structural Documentation
- WarmerAluminium S1 Roof Lantern Kit (slimline profile)
- Comprehensive Structural Assembly Drawings for rapid site fitting
5 day 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.
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 flat 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 maximum span possible without adding extra structural support?
How does the S1 Roof Lantern integrate into the flat roof kit?
The flat roof system is specifically engineered to integrate seamlessly with our slimline WarmerAluminium S1 Roof Lantern. The kit includes a fully insulated lantern upstand to maintain thermal efficiency. Because our S1 lantern features ultra-slim profiles and discreet external rafter cappings rather than the bulky T-bar caps used by competitors, it maximises natural light to create a sleek, contemporary “more sky, less roof” aesthetic.
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