Mercia Products Authorized Dealer
Sherwood Harlow 3M X 4M Insulated Garden Room
Sherwood Harlow 3M X 4M Insulated Garden Room
- Free Installation Service.
- Free Insured Shipping.
- 10 Year Anti-rot Guarantee.
- Manufactured in the UK.
- Reasonable Price
- 7-10 Days Delivery
Low stock: Only 5 left
Couldn't load pickup availability
What makes the Sherwood Harlow garden room insulated for year-round use?
The Sherwood Harlow Insulated Garden Room features Eco-quilt multi-foil insulation in the walls, roof, and floor, ensuring that it stays warm and comfortable throughout the year. This makes it an ideal choice for insulated garden rooms in the UK, whether you need a garden office room or a relaxing space.
Can I use the Sherwood Harlow garden room as an insulated garden office room?
Yes, the Sherwood Harlow 3m x 4m Insulated Garden Room is perfect for use as an insulated garden office room. Its insulation ensures a comfortable working environment, even in colder weather, and the space is customizable to fit your needs.
What size options are available for the Sherwood Harlow insulated garden rooms?
The Sherwood Harlow Insulated Garden Room is available in several size variants, including 3m x 4m, 4m x 3m, 4m x 4m, and more, making it flexible for any garden size or intended use, including insulated garden offices or additional living space.
Is the Sherwood Harlow garden room easy to install?
Yes, the Sherwood Harlow Insulated Garden Room is designed for easy installation, with an option for professional installation service. The building is fully fitted and ready for use, ideal for those looking for a hassle-free garden office room or insulated garden room in the UK.
Can I customize the Sherwood Harlow insulated garden room design?
Absolutely! The Sherwood Harlow Insulated Garden Room is highly customizable, allowing you to adjust the door placement, add more windows, or tailor the space to suit your needs, whether it's for a home office or a year-round insulated garden room.
Does the Sherwood Harlow garden room come with a warranty?
Yes, the Sherwood Harlow Insulated Garden Room comes with a 10-year guarantee, ensuring that your investment in an insulated garden office room or garden room is protected for years to come.
How long does delivery take for the Sherwood Harlow garden room?
Free delivery is available for the Sherwood Harlow Insulated Garden Room to most UK postcodes, and it typically arrives within 7-10 working days. The fast, reliable delivery service ensures you can start enjoying your insulated garden room or office space as soon as possible.







Looking to create a contemporary home extension that offers something unique? Perhaps you require additional living space, a home office or a garden gym. The Harlow Insulated Garden Room provides an all-purpose space, designed specifically for year round use.
This 3m x 4m garden room boasts an architecturally stunning exterior, with clean angles and a geometric shape. Our unique wing design creates an ultra-modern and stylish aesthetic, guaranteed to become a feature within your garden. The wings create a sheltered porch to the front of the building, perfect for rainy days or for added shelter in the summer. Manufactured to order here in the UK by our highly skilled team, using only the highest quality materials, you can be confident in the quality.
So much more than a summerhouse, this building is packed with premium features as standard. The walls, roof and floor contains Eco-quilt multi-foil insulation, which provides the same insulation as 100mm of glass wool. This combined with the double glazed windows and French doors ensures a warm, welcoming and comfortable interior all year round. The 100mm double skinned walls have also been designed with an easily removable internal panel to enable you to fit and conceal any electrics you may require – perfect for tidying away all your office cables. Finally the roof is covered with a superior waterproof rubber membrane, designed to last for 50 years!
Available in multiple variants, this garden room is versatile and customisable. Looking for more windows? Not a problem. Wanting to move the door location? We can do that. Just give us a call and we can discuss the options with you! Mercia Insulated Garden Rooms are manufactured here in the UK, using sustainably sourced and regulated timber.
Available variants:
- 3m x 4m
- 4m x 3m
- 4m x 4m
- 5m x 3m
- 5m x 4m
- 6m x 3m
- 6m x 4m
Specifications
- Treatment Type: Untreated
- People Req'd To Build: Fully Fitted
- Guarantee: 10 Year Guarantee
- Cladding: Shiplap+ Tongue & Groove
- Cladd Thick: 72mm Thick Double Skinned Walls
- Roof Material: OSB & 12mm Tongue and Groove
- Floor Material: 16mm Tongue & Groove
- Door Style: Double Doors
- Building Type: Garden Room
Dimensions
- Width: 20' 2" / 6.17m
- Depth: 15' 10" / 4.85m
- Eaves Height: 7' 2" / 2.19m
- Ridge Height: 8' 0" / 2.44m
- Door Width: 4' 11" / 1.51m
- Door Height: 6' 0" / 1.85m
- Internal Width: 19' 8" / 6.0m
- Internal Depth: 13' 1" / 4.0m
- Floor Width: 20' 1" / 6.14m
- Floor Depth: 13' 6" / 4.14m
Installation Service

Sit back and let us do the hard work! Our installation service is designed to not only save you valuable time but also take the work of moving and constructing the building off your shoulders. Our fully trained, expert fitters work professionally and carefully to ensure that your new garden building is constructed safely and to the highest industry standards.
And don't worry, we make sure to clean up afterwards, taking away excess packaging and leaving you to enjoy your new building.
Learn more at: https://www.gardenarch.co.uk/pages/installation-service
Home Delivery

We offer a fast, free and reliable home delivery service with every order to most UK postcodes. With the ability to pick-a-day that suits you and your schedule, there's no need wait around for days on end.
Our friendly and punctual delivery drivers will deliver your building within 7 - 10 working days of purchase at the front of your property. All of our products are delivered flat packed, to ensure it is easy for you to move the product from the delivery location to the build site.
On the day of delivery you'll be given a two hour delivery slot and our driver will keep in contact with you, so you can make the most of your day.
Learn more at: https://www.gardenarch.co.uk/pages/delivery
GardenArch vs Other Brands
-
GardenArch
- Reasonable Prices + No Fees
- Free Shipping.
- Free Installation Service.
- Made in UK.
- 100% High Quality Materials.
- 10 Year Anti-rot Guarantee.
-
Others
- Expensive Prices + Fees
- Paid Shipping (£100+).
- Paid Installation Service (£500+).
- Imported from China.
- 100% Low Quality Materials.
- 1-5 Year Anti-rot Guarantee.
The Installation Service Process





Why Choose Us?
-
Free Pick A Day Delivery
-
Free Installation Service
-
100% Made in UK
-
10 year Anti-Rot Guarantee
-
100% Satisfaction Guaranteed