3×4 Grande Garden Room Kit

In stock ready for immediate dispatch 

Actual size 4.5m x 3.09 13.9M2 


Our Grande Garden Room kit option is designed to offer our customers a generous space suitable for multiple uses. Whether you want to accommodate friends overnight, create a home cinema fit for all the family or establish your business working alongside multiple colleagues from the comfort of your back garden, then our Grande option is the one for you.

The Grande Garden Room kit is our mid range, medium sized studio. At 3 x 4.5m it is a functional, multi-purpose space for use by all the family. A bright and spacious room to enjoy, with excellent sound proofing qualities and thermal stability. The Grande Garden Room is constructed using our next generation Bio-SIP system. Bio-SIP’s are fully sustainable and made from 100% recycled plastic and natural fibers, which provide superior insulation and performance all year round. The floor is also made from Bio-SIP’s whilst the roof is constructed using metal SIP’s, creating a watertight, warm and wonderful space to enjoy throughout all seasons.

Bring the outside in

To achieve a sense of unity with the garden and surroundings, we have opted for 2400mm Bifold doors, which when fully opened, create a change in flow and feel to the overall space, bringing the outside in! Why not extend the footprint of the studio too, with the addition of decking or a patio? With the bifolds opened up, the Grande instantly connects you to the outdoors whilst potentially doubling your usable space. Perfect for barbecues on hot summer days and balmy late nights around the fire pit.

The Grande Garden Room also comes with two full length windows, each measuring 500mm wide, allowing light to enter from two sides. As the sun moves around the garden room, inside temperatures remain constant owing to the thermal stability and performance of our Bio-SIP’s system.

The Grande Garden Room kit is finished with your choice of wooden cladding in either larch or cedar to complete the look. A small heat source will comfortably warm your space quickly and effectively on those chilly mornings. Why not view our scaled floor plan to visualize how a Grande Garden Room can work for you? 


Materials / Info Description / Insulation Thickness UValue
External Size

3090 x 4490 (10.1ft x 14.7ft)  

Internal Size

2800 x 4200 (9.2ft x 13.8ft)  

Sustainably Built Eco and Bio Yes, recycled materials, natural fibers & Longer life
Roof insulation Metal SIP PIR (Polyisocyanurate) 80mm 0.27 W/M2k
Floor insulation Bio-Sip PET (polyethylene terephthalate) 100mm 0.27 W/M2k
Wall insulation Bio-Sip PET (polyethylene terephthalate) 100mm
0.27 W/M2k
Overall wall thickness 140mm
Internal finish Natural Fiber  panel unfinished 2.5mm N/A
Floor bearers Wood C24 grade treated FSC 80mm N/A
Window / Doors uPVC or aluminium White or upgrade to colour 40mm 1.7 W/M2k
Double glazing Toughened glass Argon gas filled 25mm 1.4 W/M2k
Guarantee 25 years Structural and components
Life expectancy 50+ years Some maintenance will be needed
DIY insulation of building 12 hours 3 competent people
DIY foundation 9 Hours Depend on ground conditions
Delivery 5 day courier Flat packed on pallet


We recommend using a 3rd party base from any of the following providers:

StopDigging EasyPad EcoBase


If you are unsure which type to go for we can run through this with you in a call. Call us now on 01483 346070.

Why buy from us?


We offer guaranteed peace of mind with our 25 year guarantee on all modular buildings

Easy Assembly

Your kit will arrive ready for assembly. No Specialist tools required 

Quick Assembly

Our modular buildings screw together in around 9hrs


All Materials used in Qube Buildings are made from fully recycled or organic compounds

Made in the UK

All manufacturing and building is carried out in the UK for faster delivery and lower CO2 

FREE Survey

Discuss your specific needs with us before you place your order

Composites UK Member

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