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  • Your Guide

Replace Your Conservatory with a Flat Pack Extension

Replace Your Conservatory with a Flat Pack Extension

First Published: 18 November 2017
Refreshed: 15 November 2024
Reading Time: 2 minutes

Does your conservatory become unbearably hot in the summer and far too cold in the winter? Many homeowners are now discovering a modern, year-round alternative: the flat pack extension.

Flat pack extensions are highly insulated, factory-made structures that can be assembled on-site in a matter of days. Leading garden room suppliers, like Garden Spaces, specialise in these contemporary extensions, transforming unused conservatories into functional living spaces.

A flat pack extension replaces a conservatory

Bespoke Contemporary House Extensions

This Garden Spaces project highlights the benefits of flat pack extensions. The client wanted to replace a conservatory that had become unusable due to seasonal temperature extremes, opting instead for a highly insulated timber extension. They chose Garden Spaces for its expertise in building with Structural Insulated Panels (SIPs), which, when combined with double-glazed doors and windows, create a space that can be comfortably enjoyed year-round.

Large section of glazing on the front wall

For this project, Garden Spaces designed a 6.2m x 3m extension with floor-to-ceiling glazing on the front elevation, allowing a seamless connection with the garden. The glazing includes central French doors flanked by stylish fixed glass panels, with an additional tall window on the side wall to maximise natural light. This design ensures the room remains bright, also enhancing the adjacent interior rooms.

Inside, the walls and ceiling were plastered and decorated, and the flooring is a durable laminate with a 25-year warranty, creating a high-quality finish. The extension was fully wired with six dimmable LED ceiling lights and four double power sockets for functionality.

The new room is flooded with natural light
Lots of natural light in the room
The room behind the extension still has plenty of light

Durable, Low-Maintenance Exterior Finishes

The exterior finishes of the extension were selected for durability and minimal upkeep. The Cedar cladding, with a lifespan exceeding 25 years, can be left to weather to a natural silvery grey or maintained with UV oil to preserve its rich tones. The dark grey uPVC doors and windows match the main house's existing windows, requiring only a simple soapy wash to maintain their appearance.

French doors open up onto the garden
A floor to ceiling window has been installed in the side wall

Sedum Roof for Insulation and Biodiversity

For enhanced insulation and aesthetics, the client chose a sedum roof covering. Popular in garden room design, sedum roofs provide extra thermal regulation and rainwater management, as the plants absorb much of the rainfall. This reduces runoff into the drainage system while filtering pollutants from the rainwater.

Additionally, a sedum roof contributes valuable green space for local wildlife, attracting birds and insects. From an aesthetic viewpoint, it looks far more appealing than a traditional flat roof, especially when viewed from above.

Replace your conservatory with a garden room extension-1

By replacing their conservatory with a flat pack extension, the homeowner has gained a spacious, energy-efficient room that’s usable every day of the year, with a seamless connection to the garden.

Learn More

If you're interested in creating your own flat pack house extension, reach out to the Garden Spaces team on 0845 387 9 387 or via email info@gardenspaces.co.uk. Visit the Garden Spaces website for inspiration and to explore more of their work.

Visit the Garden Spaces website
Visit the Timeless Garden Rooms website
Visit the Garden2Office website
Uniquely designed garden
rooms & annexes
Bespoke, tailored to
you & your garden
No planning permission
required in most cases
Garden offices to
self-contained annexes
Based in Brighton & Hove,
building across England
See our work →
Visit the Modern Garden Offices website

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Visit the Garden Annexes website to explore their homes in the garden
Visit the Garden Spaces website
Visit the Bridge Garden Rooms website
Visit the Ark Design/Build website
Visit the Modern Garden Rooms website
Uniquely designed garden
rooms & annexes
Bespoke, tailored to
you & your garden
No planning permission
required in most cases
Garden offices to
self-contained annexes
Based in Brighton & Hove,
building across England
See our work →
Explore the Cosy Garden Rooms website to learn more

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