6m x 4m Insulated Garden Room – Free Installation


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  • Double Glazing
  • 10 Year Anti-Rot Guarantee
  • The building is fully insulated – The walls, the floor and the roof are fitted with Eco Quilt insulation to retain heat in the winter and reflect the sun on the hottest summer day – making these buildings perfect all year round.
  • Double skinned 72mm walls with interlocking cladding making them weatherproof, strong and durable.
  • FREE INSTALLATION – Our professional team will install this building free of charge.
  • Customise your design – Choose where your doors and windows go.
  • 16mm matchboard tongue & groove floor
  • OSB & Matchboard roof – 12mm OSB external and interlocking matchboard internally makes a strong roof with a professionally quality finish.
  • EPDM Rubbercover Roofing – A waterproof synthetic rubber compound with protects your roof for up to 50 years.


Imperial Size 20 x 12
People Req’d To Build Fully Fitted
Framing 44mm x 58mm
Anti-Rot Guarantee 10 Years
Cladding Style Shiplap+
Cladding Material 16mm Shiplap+ Tongue & Groove
Roof Material OSB & 12mm Matchboard
Floor Material 12mm Matchboard
Roof Type Flat Roof
Door Style Double Door
Building Type Garden Room
Metric Size 6m x 4m
Under 2.5m Tall Yes
Imperial Metric
Width 20′ 3″ 6.17m
Depth 15′ 10″ 4.83m
Internal Width 20′ 1″ 6.12m
Internal Depth 13′ 0″ 3.96m
Base Width 20′ 1″ 6.12m
Base Depth 13′ 6″ 4.11m
Building Orientation


The 6m x 4m Insulated Garden Room is a modern day alternative to your extra room problem. Looks great in any garden as well as practical to be used all year round thanks to the design that incorporates fully insulated walls, floor and roof. This room can be used from anything from a home office, gym, salon, play room or whatever you like thanks to its 365 day weather and temperature proof design.


The price of this building includes full installation into your garden. A firm and level base is required for this, either made of solid concrete or concrete slabs that need to be completely flat and level. It is recommended that the floor on the inside  garden room is covered by either carpet or laminate flooring to reduce wear and tear on the match boards.

These Insulated Garden Rooms are NOT pre-treated or painted. Application of wood preservative is not part of the home installation service. In order to qualify for our 10 year anti-rot guarantee the building must be annually treated with a high quality spirit based wood preservative.

This building comes with a 7 day money back guarantee.

These buildings do not require planning permission but please contact your local planning office if you want to confirm this. You can also read our planning permission rules here Planning Permission Info


Delivery on this building is free to the majority of the UK and will take up to 4 weeks, a member of our quality control will be in touch to discuss delivery and installation of your building.

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