Transform your next building project with Durabase conservatory bases and extension foundations from Novaseal. Designed as a modern alternative to traditional foundation methods, these prefabricated steel systems provide a strong, practical foundation for conservatories, single-storey home extensions and suitable garden rooms.
Manufactured to suit your project's requirements, Durabase modular bases use precision-engineered steel frames supported by concrete pads or ground screws. This innovative approach can reduce the need for extensive excavation, minimise site disruption and streamline the construction process. Optional modular wall systems provide further flexibility when designing your new living space.
Durabase is a prefabricated steel foundation system designed for conservatories, single-storey home extensions and suitable garden rooms. Offering a modern alternative to traditional concrete foundations, Durabase combines precision-engineered steel components with an insulated floor structure to create a strong, practical base for your new living space.
Unlike conventional foundations that often require extensive excavation, Durabase uses strategically positioned concrete pads or ground screws to support its steel framework. The system features an outer steel ring beam and internal joists, manufactured to suit your project’s dimensions and delivered in manageable sections for assembly on-site. This approach can significantly reduce groundwork, construction waste and disruption to your property.
With the foundations already prepared, you can typically assemble a Durabase conservatory base in less than a day, depending on the project’s size and complexity. You can also combine the system with prefabricated Durawall panels, creating a flexible solution for building conservatories and extensions with less reliance on traditional construction methods.

The Durabase range offers prefabricated foundation and wall systems for different building needs. From insulated conservatory bases to modular home extension foundations, each system combines durable steel construction with practical design features to help simplify the building process.
Durabase 50 Conservatory Bases
The Durabase 50 is a prefabricated steel foundation system developed specifically for conservatories and suitable garden rooms. With a strong steel ring beam, internal floor joists, and 50mm of insulation, this system offers a practical alternative to conventional concrete foundations.
With a floor U-value of 0.50 W/m²K, Durabase 50 is designed for conservatory applications where the existing external house door remains in place, and the new space is not connected to the property’s central heating system.
You can combine the system with full-height glazing or Durawall modular wall panels to create a bespoke conservatory layout. Its prefabricated construction also minimises excavation and simplifies installation, making it particularly useful for projects where access or site disruption is a concern.
Durabase Plus 100 Extension Bases
Designed for ground-floor, single-storey home extensions, Durabase Plus 100 delivers enhanced thermal performance and a robust foundation for adding living space.
The system incorporates a reinforced steel ring beam and 100mm of floor insulation, achieving a U-value of 0.18 W/m²K. This improved insulation makes Durabase Plus 100 suitable for extensions that require higher thermal efficiency than a traditional conservatory base.
Durabase Plus 100 also holds MFA system approval for compliance with Building Regulations in England and Wales, although individual projects still require the appropriate assessments and approvals.
Durawall Prefabricated Wall Systems
Durawall is a modular wall system designed to complement Durabase conservatory and extension foundations. Made with galvanised steel frames, these prefabricated panels offer a strong, practical alternative to traditional brick-and-block construction.
Each wall section is manufactured off-site and delivered in manageable units, simplifying assembly and reducing the construction work required on your property.
Durawall offers a choice of external finishes, including real brick slips, render-ready surfaces and plain boards for further customisation. This allows homeowners to achieve a finish that complements their existing property while benefiting from modern modular construction.

Choosing Durabase over traditional conservatory foundations can make your building project faster, cleaner, and easier to manage. Unlike conventional concrete and brick foundations, Durabase uses prefabricated steel components manufactured off-site and assembled on prepared supports, reducing on-site construction work.
| Feature | Durabase Modular System | Traditional Foundations |
|---|---|---|
| Installation | Prefabricated components allow faster on-site assembly | Excavation, concrete work and masonry can extend construction times |
| Groundwork | Concrete pads or ground screws can reduce excavation | Often requires deeper, continuous excavated foundations |
| Site Disruption | Less digging can mean reduced waste, mess and machinery | May involve greater excavation and removal of soil |
| Project Costs | Can reduce labour, equipment and waste disposal costs | Costs depend on ground conditions, materials and labour |
One of the main advantages of Durabase conservatory bases is their suitability for properties with restricted access. The modular components are delivered in manageable sections, making them easier to transport through narrow entrances or around existing structures. This can be particularly useful for terraced properties and gardens where access for larger machinery is limited.
Whether you’re planning a conservatory or single-storey extension, contact Novaseal to explore whether Durabase is the right foundation system for your project.
At Novaseal, we supply trade professionals across Hampshire and surrounding areas with Durabase conservatory bases and extension foundation systems. Designed to simplify construction, these prefabricated steel systems offer installers a practical alternative to traditional groundwork, reducing on-site time and streamlining conservatory and extension projects. Each Durabase system is manufactured to suit the project’s dimensions and delivered in manageable sections for straightforward assembly. On suitable sites, less excavation means reduced waste, easier access, and fewer labour-intensive construction stages. Optional Durawall panels can also help simplify wall construction while providing a range of attractive finishes for homeowners.
As a Novaseal trade customer, you’ll benefit from competitive trade pricing, expert technical advice, efficient quotations and dedicated sales support. Whether you’re working on a small conservatory installation or a larger home extension, our team can help you explore the available Durabase systems and find a suitable specification for your project.
Durabase is ideal for properties with restricted access, narrow entrances or uneven ground. Its modular steel components are easy to transport and can accommodate challenging site conditions, subject to a suitable foundation design.
With integrated floor insulation, Durabase reduces heat loss and improves indoor comfort. Depending on the selected system, floor U-values can be as low as 0.18 W/m²K.
Every Durabase system is manufactured to suit your project’s dimensions and layout. Choose from flexible configurations, glazing arrangements and optional Durawall panels to complement your conservatory or extension design.
Prefabricated steel components help streamline on-site assembly and reduce construction work. With the necessary groundwork in place, Durabase can significantly shorten foundation installation compared with traditional methods.
The cost of a Durabase conservatory base depends on your project’s dimensions, ground conditions, chosen foundation system, and installation requirements. Whether you’re planning a new conservatory or a single-storey home extension, Novaseal can help you explore the available options and find a solution that suits your project and budget.
Factors such as choosing between Durabase 50 and Durabase Plus 100, concrete pads or ground screws, and optional Durawall panels can affect the final price. While prefabricated construction can help reduce labour and groundwork costs compared with traditional foundations, individual project requirements will determine the overall cost.
Ready to get started? Call Novaseal on 0132 9233 500 or complete our online contact form today to discuss your requirements and request a free, no-obligation Durabase quote.
What is a Durabase conservatory base?
A Durabase conservatory base is a prefabricated steel foundation system designed to support conservatories, garden rooms and suitable home extensions. It uses a durable steel framework with integrated floor insulation, supported by concrete pads or ground screws. This modular construction reduces excavation and streamlines installation compared with many traditional foundation methods.
How long does it take to install a Durabase base?
A Durabase conservatory base can often be assembled in less than a day once the concrete pads or ground screws are prepared. However, the overall installation timescale depends on the project’s size, site conditions and selected system. Additional groundwork, wall construction, and finishing work will take more time.
Can Durabase be installed on sloping or uneven ground?
Yes, Durabase can be designed to accommodate sloping gardens and properties with uneven ground levels. Its modular steel framework and adjustable support arrangements provide flexibility for challenging sites. However, a suitable site assessment is required to determine the correct foundation design, support positions and structural requirements.
Does Durabase meet Building Regulations?
Selected Durabase systems are designed to meet applicable Building Regulations requirements. Durabase Plus 100 is intended for compliant single-storey extensions in England and Wales, while Durabase 50 is designed for conservatories and suitable garden rooms. Individual projects may still require Building Control approval, structural assessments and appropriate foundation specifications.
Is Durabase suitable for properties with restricted access?
Yes, Durabase is particularly useful for properties with narrow pathways, limited rear access or enclosed gardens. The prefabricated steel components arrive in manageable sections, making transportation and assembly easier when access for larger construction equipment is limited. This can also help reduce site disruption and waste removal.
