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Description
Forest Garden Xtend Premium 4 x 3.42m Insulated Garden Office with 1/2 WindowForest Garden Xtend 4. 0M Premium Achieve your work life balance with the Xtend range of garden buildings from Forest Garden. These new buildings have everything you could wish for in a home office contemporary looks, real energy efficiency, ease of construction and keen pricing. Space is at a premium in most homes and extensions are costly. An Xtend garden building is constructed from high quality, energy efcient materials and is underwritten with a
Forest Garden Xtend 4.0M Premium
Achieve your work/life balance with the Xtend range of garden buildings from Forest Garden. These new buildings have everything you could wish for in a home office - contemporary looks, real energy efficiency, ease of construction and keen pricing.
Space is at a premium in most homes and extensions are costly. An Xtend garden building is constructed from high quality, energy efficient materials and is underwritten with a 15 year structural guarantee
Xtend is a clever choice for your garden building as it comes delivered in pre-cut modular SIP panels ready for assembly. Some of the best designed new homes are now made this way, so why not your new garden building? A step-by-step guide means the build is incredibly straightforward.
Keeping you warm in winter and cool in summer, Xtend delivers real energy efficiency. Double glazed windows, highly efficient insulated walls, roof and ?oor combine to drive down energy costs. It’s a fact that Xtend garden buildings can be as energy efficient as a new-build home – with an EPC energy rating of B.
Features:
STRUCTURAL INSULATED PANELS (SIPS)
- The core structure of an Xtend building is made from SIPs panels - high performance material for building construction. The 21st century way to build
- 9 7mm thick insulated walls consist of 75mm of polystyrene insulation sandwiched by two sheets of oriented strand board (OSB)
- Gives structure and insulation in one pre-assembled and cut-to-size panel
- Total wall thickness including SIPS panels, internal and external cladding and cavities is 177mm
- Roof is 11mm OSB + 100mm insulation + 11mm OSB = 122mm total
External Cladding
- Pre-cut external timber cladding panels for quick and easy assembly
- No measuring and cutting every single batten and board to size before mounting
- Cladding panels are simply positioned on the building and screwed into place
- Panels are made with 15mm thick premium interlocking tongue and groove boards mounted to framing battens
- Comes untreated and we recommend the application of any of the following:c
- Sikkens Cetol HLS Plus • Restol Wood Oil • Timmersol ETS Double Protectant • Osmo Country Colour • Osmo Natural Oil Woodstain
Internal Cladding
- Pre-cut interior MDF panels for quick and easy assembly for walls and ceiling
- No measuring and cutting every panel
- Wall panels are mounted to 28mm thick battens creating a cavity perfect for routing electrical wiring
- Roof battens are 45mm thick to allow for recess roof lights
- Comes with primer applied – can be painted in a colour of your choice using standard interior emulsion paint
- The panel design has a vertical beaded profile
- The floor is left unfinished for you to add your own choice of covering
Roof Covering
- External roof covering is made from 1.2mm thick EPDM black rubber
- It creates a maintenance free waterproof membrane
- Does not crack, split or rot
- Does not support moss or algae growth
- UV stable & environmentally friendly
- Safe and easy to install – the system is laid with cold applied adhesives (supplied)
- One piece sheet means no joints and no leaks
- 50 years roof life expectancy
- Anthracite grey fascias include
Windows & Doors
- Window material: uPVC 5 chamber
- Window colour: Anthracite grey externally with grained finish Smooth white internally Window locking: Two double clasp, mushroom headed espagnolettes
- Door material: uPVC reinforced 5 chamber
- Door colour: Anthracite grey externally with grained finish Smooth white internally
- Door locking: 7 point multi-lock with ultion three star security barrel
- Glazing 28mm, A rated, double glazed, safety glass
Energy Efficiency
- Highly efficient insulated walls roof and floor
- Double glazed windows
- Warm in Winter, cool in Summer
- Energy efficiency model rating of 78 (category C)*
- Potential to increase to 82 (category B) with the addition of a photovoltaic solar panel
- *based on lighting from 3 x 4 watt LED bulbs and heat from a high efficiency wall mounted heat pump
Tech Specs:
- Weight: 2400 kg
- Dimensions: 342 × 404 × 250 cm
- Construction Type: SIPs panels with external Tongue & Groove cladding/internal MDF cladding.
- Roof Type: Pent
- Treatment: None (Kiln Dried)
- Colour: Natural Timber
- Product Size (h x w x d) cm Overall dimension when assembled, including overhangs: 250 x 404 x 342
- Width at base (footprint) (cm): 403
- Depth at base (footprint) (cm): 304
- Estimated Weight (kg): 2400
- Material: Various – see spec breakdown.
- Country of Origin: United Kingdom
- Wall Cladding Thickness (mm): External 15mm / Internal 9mm
- Door Type (single / double): Double
- Number of Windows: 2 (opening)
- Glazing: Yes – Double
- Glazing Material: Glass
- Roof Material Inner: SIPs panels
- Roof Thickness (mm): 122mm
- Roof Material Outer: EPDM Rubber Membrane
- Floor Material: SIPs panels
- Floor Thickness (mm): 108mm
- Door Locking (eg: plate/wire hasp & staple): 7 point multilock
- Home Delivery Lead Time: 3 weeks
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
4.9 ★★★★★
Based on 1386 reviews
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Product Reviews
★★★★★ 5
Great Dual Monitor Mount
Color: White-Mount
I bought this dual monitor arm desk mount for my wife’s computer to mount two 32” monitors. Unpacking and installation were fairly straight forward. The only two issues I had were: 1). Instructions state that this mount can be installed using a grommet hole in a desk to secure it to the desk. However, most grommet holes in desks (at least in the United States) are 2” holes. The grommet mounting option uses two all-thread bolts screwed into the base, but the outside spacing of the bolts is about 2-1/4” which, of course, is too big for 2” grommet holes. I ended up drilling two smaller holes in the desk, one for each all-thread bolt. On the plus side, this option secures the mount to the desk very securely. 2). There is no guidance in the installation instructions for optimal placement of the arm mount on the desk. I ended up temporarily installing the lower set of arms on the mount base and then experimented moving the base around the desk while swinging the arms to make sure they would clear all computer and other equipment on the desk as well as the walls. This method worked well and final placement clears everything while still giving full articulation of both arms. The unit is very heavy-duty and quality is excellent. Other than the two items mentioned above I am very impressed with this product. After installing this unit on my wife’s desk, and playing with it for a few days, I ordered one for my desk. Because of the two issues above I would give this 4-1/2 stars if I could. But these smaller issues are not enough for me to lower my rating to 4 stars, so 5 stars it is.
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Reviewed in the United States on January 20, 2021
★★★★★ 5
Great Looking and Sturdy Monitor Arms
Color: White-Mount, Color: White-Mount
I'm so impressed with these arms. They're super strong and sturdy holding up my 27" monitor and 34" ultrawide monitor. Setting up for the most part is pretty simple and easy.
One of the best things I like about these arms is the cable management. I had several arms before for my setup at home and work, and the cable covers are usually pretty flimsy and just slide and lock in. I have a lot DP and HDMI cables due to my dual workstation, so these cable covers often end up popping out since its so full. These cable covers are different since they are screwed down tight with a bolt. All my cables fit pretty snug, but there is no bulging and I don't have to worry about the covers popping off ever again. I'd recommend keeping it at a maximum of 4 thicker cables though. However, fair warning that attaching the covers can be a pain so if you have to detach cables often, the screwed in covers can be a problem. If you have a set up like mine that won't really change often, it works well. If you can, I would suggest having 2 people set up the cable management. One to hold down the cover in place and the other to screw it in. I did it myself just fine though.
The range of motion is great for my needs, but please note that I tried stacking my monitors and it didn't quite work. I would say it's 1 to 2 inches shy of properly stacking them.
Overall, a great looking set of dual monitor arms. The extra ports on the base are a cool feature that do work, but I haven't had much use of it yet. Love that they had a white option to match my set up too. These are a little pricey, but they're really worth it!
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Reviewed in the United States on February 21, 2021
★★★★★ 5
You will be hard pressed to find an equal or better product regardless of the price.
Color: Black-Mount, Color: Black-Mount
Review of AVLT Dual 13"-35" Monitor Arm Desk Mount
I do not usually rate items, except for products that are exceptional or are provided by a vendor that is above all others.
I looked at this item several times, because the price was $100 less than my five year old dual arm could not raise the 38” monitor more that 8” from the desk surface and barely keep my wiring hidden.
Finally, the website for AVLT convinced me to place the order for the AVLT-DM41-1, Dual 13"-35" Monitor Arm Desk Mount. I was not disappointed.
The quality and finish of the aluminum mount is space age quality, the manual acceptable (ilea type); most important the I can raise my 38” monitor to a perfect ergonomic height.
My monitors are a Dell 38” U3818DW, (larger than 13” to 35” range) and a Dell 24” U2412M, U. for each I use the factory power cable, DP to DP display port 6 foot cables and high speed USB 3 cables for each monitor.
The assembly went without a hitch, no problem hiding the heavy cables that I use, my only problem was that my was not a C-clamp, attaching the hex bolts to the base from the underside of my desk was difficult; t would had been easier had they used a stud bolts to clamp the unit down.
The arm springs had no problem supporting my 38” monito, the unit is so sturdy I expect to receive years of service.
I strongly recommend this item because of value, quality and design. You will be hard pressed to find an equal or better product regardless of the price.
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Reviewed in the United States on October 10, 2020
★★★★★ 5
Great product
Color: White-Mount
Amazing product. It’s perfect. Tried a few other dual monitor arms and they sucked and didn’t hold up the monitors. This one is amazing and aesthetically pleasing. Well worth the money. All parts included. Large range of motion, you just have to loosen the screws to make it easier to move or tighten to keep everything still. Perfect size and provides all my amount of desk space back.
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Reviewed in the United States on January 10, 2026
★★★★★ 5
Good quality last long
Style: FHD 240Hz, Size: 27-inch, Style: FHD 240Hz, Size: 27-inch
I’ve had it for about almost two years and it’s never don’t me wrong, Someone even smacked it almost a punch and it still works perfectly so it’s sturdy 😭
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Reviewed in the United States on April 30, 2026