Insulated walls
28 mm composite panels with an XPS core reach a U-value of 1.05 W/m²K for real heat retention.


Transform your backyard with The Madison Garden Room, a premium 11' x 11' insulated garden room that perfectly blends modern elegance, year-round comfort, and maintenance-free convenience. Whether you're looking to create a home office, garden retreat, or studio space, The Madison is the ultimate solution for stylish and practical outdoor living.
Featuring double-glazed, insulated panels, this garden building ensures exceptional thermal efficiency, making it ideal for four-season use. Enjoy a warm, quiet space in winter and a cool, shaded environment in summer.
🌳 Quick and easy installation with PRE-ASSEMBLED COMPONENTS. 
🌳 Minimal site preparation required – save time and hassle
🌳 Fully insulated & double-glazed construction for year-round comfort
🌳 Maintenance-free aluminum frame with durable finishes
🌳 Spacious interior (10'2" x 10'2") with nominal exterior dimensions of 11' x 11' x 8'10" high
🌳 Backed by a 10-year manufacturer warranty for peace of mind
Designed to blend seamlessly into any garden or patio setting, The Madison Garden Room is the perfect investment for expanding your outdoor living space with minimal effort and maximum impact.
🌳 20° roof pitch for optimal water drainage and architectural appeal
🌳 Silvery Grey exterior with White interior finish for a sleek, modern look
🌳 25mm multiwall polycarbonate roofing panels (capping) with heat-reflective technology. This is a heatshield product which lowers the heat absorption with multi-cell polycarbonate interior.
🌳 Features aluminum capping system for added durability and weather resistance
🌳 UV-blocking and heat-reducing roof panels help regulate interior temperature
🌳 Built-in gutter system with downpipes for seamless rainwater management
🌳 Anthracite Grey exterior with White interior for a contemporary contrast
🌳 Constructed with 28mm insulated composite wall panels
🌳 Made of dual 2mm powder-coated aluminum skins and 24mm Ravatherm XPS core for superior thermal insulation
🌳 High energy efficiency:
U-Value: 1.05 W/m²K (excellent heat retention)
R-Value: 0.95 m²K/W (resists heat transfer)
🌳 Low-maintenance, weatherproof exterior with long-lasting powder-coated finish

🌳 28mm double-glazed Low-E glass for energy efficiency and UV protection
🌳 Two solid insulated wall panels and
🌳 Two large sliding glass door walls 
🌳 Preassembled panels, doors, and windows for fast and hassle-free installation
🌳 Includes two PVC-u, steel-reinforced sliding patio doors with multi-point locking systems for added security
As with all of our Nordic garden rooms, the Nordic ECO base is supplied as standard. All we require is a flat and level slab base or concrete pad for the ECO base to sit on. The ECO base offers the following benefits:
🌳 The ECO base is pre-cut specifically to the Nordic Garden Building of your choice.


All sizes are approximate and can vary slightly due to manufacturing differences.

Nordic Garden Buildings guarantee (terms and conditions apply):
Exaco · Hobby Greenhouse
Why customers choose it
28 mm composite panels with an XPS core reach a U-value of 1.05 W/m²K for real heat retention.
Large sliding glass door walls with 28 mm double-glazed Low-E glass bring the garden inside.
Two PVC-u, steel-reinforced patio doors lock with multi-point systems.
Heat-reflective 25 mm polycarbonate roof panels block UV and reduce heat build-up.
The Nordic ECO base and a Montreal vinyl floor come standard.
Panels, doors and windows arrive pre-assembled, and only a flat, level slab is needed.
The details
| Exterior size | 10' 9" x 10' 9" (nominal 11' x 11') |
|---|---|
| Interior | 10' 2" x 10' 2" |
| Walking height | 6' 5" at the eaves, 8' 2" at the ridge |
| Framework | 70 mm profiles |
|---|---|
| Walls | 28 mm insulated composite panels, dual 2 mm aluminum skins, 24 mm XPS core |
| Wall U-value | 1.05 W/m²K (R-value 0.95 m²K/W) |
| Color | Anthracite Grey exterior, white interior |
| Roof | 25 mm multiwall polycarbonate, heat-reflective, UV-blocking |
|---|---|
| Roof pitch | 20 degrees |
| Roof finish | Silvery Grey exterior, white interior |
| Gutters | Built-in gutters with downpipes, aluminum capping |
| Glazing | 28 mm double-glazed Low-E glass |
|---|---|
| Door | 2 PVC-u steel-reinforced sliding patio doors, multi-point locking |
| Walls layout | 2 sliding glass door walls, 2 solid insulated walls |
| Base | Nordic ECO base and cover, 50 mm high |
|---|---|
| Floor | Montreal vinyl |
| Site needs | Professionally prepared, spirit-level flat slab or concrete pad |
| Warranty | 10 yrs frames, glazed units and stainless hardware; 5 yrs painted profiles and tiled roof vents |
|---|---|
| Other hardware | 2 years; external Georgian bars and vents: 1 year (terms apply) |
| Made in | UK |
Free curbside freight delivery
Choose your size, color and options. Your greenhouse ships from the manufacturer's warehouse, packed for freight.
We'll contact you to set up a delivery time frame that works for you.
Delivery is by LTL motor freight on an 18-wheeler. Let us know about tight roads or low wires so we can plan ahead.
Someone needs to be there to receive the delivery. The driver does most of the work but may need a hand.
Foundations and bases are bulky, so we recommend ordering them together with your greenhouse to avoid a separate freight charge.
Good to know
Can't find your answer? Our greenhouse specialists are happy to help you choose.
678-408-8222 Email usYes. Shipping is free. Locations with limited access, such as islands, are rare exceptions that may carry an extra fee, and we'll tell you before anything ships.
Yes. If you find the same greenhouse for less from an authorized dealer, call or email us with the offer and we'll review it.
Yes. Mulberry Greenhouses is an authorized retailer, so your greenhouse is covered by the full manufacturer warranty.