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Celsius Solid Roof
The true warm and lightweight solid roof system with no cold spots

The Celsius Solid Roof is an innovative tiled roof system for conservatory retrofits, as well as new tiled conservatory style extensions. Celsius Solid Roof is constructed using highly insulated SIPs (Structural Insulated Panels), deliberately avoiding the use of an aluminium framework to create a truly warm solid roof construction - with no possibility of cold bridging


Warmth and comfort

The superior thermal performance of Celsius Solid Roof creates a high quality living space that ensures warmth and comfort, helping to insulate the home, and saving on heating bills

24/7, 365 days a year use

Celsius Solid Roof, new or replacement building extensions are usable 24/7, 365 days a year, whatever the season, thanks to the high levels of thermal insulation achieved. Warm in the winter and cool in the summer, Celsius Solid Roof gives homeowners a true ‘year round room’

Inside and outside living

A well-built tiled extension is the design solution that can unlock the potential for both inside and outside living, seamlessly linking homes to gardens to make the most of outdoor spaces

Modern aesthetics

A contemporary look is guaranteed by fitting a Celsius Solid Roof, transforming the visual impact of an existing traditional-styled glazed roof conservatory

Cool enough
for me

0.15Wm2K U-value achievable with insulated plasterboard


Envirotile external roofing components are injection moulded for durability and come in a choice of 3 popular and appealing colours

  • Black
  • Brown
  • Terracotta

The tile system is self-ventilating and around 80% lighter than standard concrete tiles


Celsius solid roof features a structural array of eaves timbers, wall-plate timbers, eaves fillet timbers, ridge timbers, rafter and butt joints, in addition to  hip timbers for Victorian and Georgian designs, which are square cut or mitre cut as required to construct a purpose-built framework for the interlocking SIPs, tailored for specific project requirements


Kingspan TEK Building System panels consist of a high performance rigid urethane insulation core, sandwiched between two layers of Oriented Strand Board type 3 (OSB/3).  During manufacture, the insulation core is bonded by autohesion to the OSB/3 facings. This process provides more reliable and superior adhesion than the secondary bonding process used in the manufacture of most others SIPs

Roof Windows

High quality is assured with VELUX, the familiar brand name that is synonymous with roof windows.  Our Celsius solid roof system is designed to incorporate standard-sized VELUX roof windows finished externally in discreet Anthracite Grey, with an internal finish choice of standard White Polyurethane (perfect for modern interiors and white ceilings) or optional Natural Pine (ideal for traditional interiors) which is protected with triple-coat clear lacquer to preserve the timber of the window

Now available with new Envirotile SLATE effect finish

Optionally, your new Celsius Solid Roof can come with a traditional Slate effect finish to add authenticity to period properties

Made from 100% recycled and lightweight plastic, the Envirotile Slate Roof Tile sits on our warm SIP roof structure, avoiding the cold bridging associated with aluminium frames solid roof systems, and reducing the risk of condensation

Celsius Solid Tiled Roof Gallery

Some photos of installed Celsius Solid Roofs inside and outside

We work with Jhai Limited - a trusted professional organization who work with us to take your solid roof conservatory or conservatory rejuvenation through all relevant building regulations, ensuring safe and insulated performance, and that all relevant building regulations have been met with or exceeded

Jhai Limited have worked on over 65,000 applications in the last five years, so you know you are in safe hands

Ask about our all inclusive Building Control Approval Package

As Approved Celsius Solid Tiled Roof Suppliers and Installers we offer supply and installation services throughout South Wales including Abergavenny, Newport, Cardiff, Barry, Monmouth, Chepstow and Brecon areas and beyond

Visit us
HERONHURST Window and Door Studio
18 Mill Street Industrial Estate, Abergavenny  NP7 5HE

Talk with us on FREECall 0800 525966
Abergavenny 01873 877670     Cardiff 029 2000 1727    Newport 01633 505306     Brecon 01874 508305     Valleys 01495 707808
Aftersales Service 01873 858428

What's App and SMS Messages 07723455659

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