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Description
Mercia 4m x 4m(D) Insualted Garden RoomThe 4m x 4m Mercia Insulated Garden Room provides a versatile, fully insulated space perfect for year round use. Featuring triple layer walls with 44mm Eco quilt insulation, double glazed argon filled windows, and a durable EPDM rubber roof, it keeps your space warm and quiet. Manufactured in the UK with sustainable timber, it stands under 2. 5m, often requiring no planning permission. Professional installation is included for a hassle free setup. Key
The 4m x 4m Mercia Insulated Garden Room provides a versatile, fully insulated space perfect for year-round use. Featuring triple-layer walls with 44mm Eco-quilt insulation, double-glazed argon-filled windows, and a durable EPDM rubber roof, it keeps your space warm and quiet. Manufactured in the UK with sustainable timber, it stands under 2.5m, often requiring no planning permission. Professional installation is included for a hassle-free setup.
Key Features
- Spacious 4m x 4m insulated garden room for versatile use
- Triple-layer wall construction with 44mm Eco-quilt insulation
- Double-glazed argon-filled windows for enhanced thermal efficiency
- 16mm tongue & groove insulated roof and floor
- Robust EPDM rubber roof membrane by Firestone for weather protection
- Manufactured in the UK using sustainably sourced timber
- Fully installed with professional fitting included
- Under 2.5m height, generally no planning permission required*
*Please verify with local authorities
Specifications
| Feature | Detail |
|---|---|
| Imperial Size | 13 x 13 ft |
| Metric Size | 4 x 4 m |
| Treatment Type | Untreated |
| People Required | Fully Fitted (Installation Included) |
| Guarantee | 10 Years (with annual treatment) |
| Cladding | Shiplap+ |
| Cladding Material | 16mm Shiplap+ Tongue & Groove |
| Roof Material | OSB & 12mm Matchboard |
| Floor Material | 16mm Matchboard |
| Roof Type | Flat Roof |
| Roof Covering | EPDM Rubber (Firestone) |
| Door Style | Double Door |
| Building Type | Garden Room |
| Width | 13' 8" / 4.17 m |
| Depth | 15' 10" / 4.83 m |
| Internal Width | 13' 1" / 4.0 m |
| Internal Depth | 13' 1" / 4.0 m |
| Floor Width | 13' 6" / 4.11 m |
| Floor Depth | 13' 6" / 4.11 m |
| Under 25m² | Yes |
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
- Standard Shipping : 3-10 business days
- If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
- Please click here for more details>>> Return & Exchange Policy
4.2 ★★★★★
Based on 18 reviews
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Product Reviews
★★★★★ 5
Favorite for dry climate
I live in a dry desert and these are the only moisturizing masks I see instant results. For best results after doing my evening skincare routine I apply the mask one hour before bed. I store them in the fridge so they feel cool and soft on my skin. Once you get the hang of applying them it’s very easy the second time. I sleep with them on and remove them in the morning and my skin is glowing, plump and pores appear smaller. The mask itself is a thick durable jelly not like the typical sheet masks. The price for this is worth it if you wear the mask minimum 2-5 hours once a week
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Reviewed in the United States on November 12, 2025
★★★★★ 5
Youth Serum?
You will not regret trying this! The results are amazing!!! 🤩 After the first use my skin looked healthier, brighter, more even toned and pores were diminished. I look young again. (I’m 57.)
I have neglected my face for a few years after being the kind of girl who never left the house without makeup. I knew I needed some deep repair and thought a mask would help. Lo and behold, my beloved Amazon gave me Biodance! I just used my third mask last night and I’m still excited to peel it off the next morning. My face doesn’t look all dewy like the pictures and video but it’s definitely a huge improvement. I didn’t realize it was that dry. A couple tips-don’t worry when you first apply it if it’s not perfectly positioned. There is wiggle room and it will slide a bit. Handle carefully! It’s slimy & slippery. You can use the eyes and lips (cut outs) for other problem areas and you can tear off the nose as well. It feels cooling the moment you put it on. I had no irritation at all. I took the advice of one reviewer and sat on the couch with my head leaned back for about an hour before I went to bed to let it dry a little. Nice “ME” time. Thanks a zillion Amazon and Biodance! I vow to use a mask weekly from now until the end of time. ❤️
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Reviewed in the United States on December 14, 2025
★★★★★ 5
Cool Product
I love these masks. The are cool and white in color when you put them on and they turn clear when the stuff is absorbed. I was new to a mask that has to be on 3 hours or more, but it was cool. I had very little skin irritation and I have sensitive skin. They are very easy to put on and take off. They have a heavy cooling sensation when you first put them on because the are really wet, but it dissipated over time and was comfortable to sleep in. I use these masks twice a week. I will definitely keep using them. My skin feels softer and more firm in the morning. I just take off the mask and apply a little moisturizer with sunscreen and I'm good for the day.
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Reviewed in the United States on December 13, 2024
★★★★★ 5
Great masks!
These are great!! Wear them all night makes your skin so plump in the morning
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Reviewed in the United States on January 27, 2026
★★★★★ 4
my skin looks so healthy!
these are the only collagen masks that i feel like hydrate my skin and don't break me out (i have very problematic skin, combination and acne-prone). it gives me that glow from within look/feeling. please be aware that collagen CANNOT be absorbed through the skin, only through diet!! so the only benefits you may get from these come from the other active/non-active ingredients in these masks. but i def recommend these none the less!!
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Reviewed in the United States on March 21, 2026