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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
4.7 ★★★★★
Based on 15 reviews
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Product Reviews
★★★★★ 5
Received giftcard money to replace my plan-protected malfunctioning motherboard
I've been subscribing to the Asurion protection plan for a while. Recently, an Asus Prime PC motherboard I had bought a few months ago on Amazon stopped working well. I ended up considering filing a claim with Asurion to see if they would either fix/replace it or issue the purchase price money, so I could buy the failed electronics replacement component again for my custom-built PC. I went to the protection plan's website and started the claim filing process but couldn't find the category my failed component would be under in order to select it from the drop-down list. I ended up messaging the live customer service. The chat messaging was somewhat slow, the agent told me they were experiencing some communication delays throughout their systems. Ultimately, the agent was very kind and understanding, and completed the claim filing process for me on her side by asking me to provide the necessary info such as the item's product name, date of purchase, price before taxes, etc. I received a printable UPS shipping label in the email, printed it, and returned the item in the mail. Approximately 2 days later, I received an Amazon giftcard code in the email with the dollar amount equal to the item's price before the sales tax. Then I redeemed the giftcard code on the Amazon page and proceeded to apply the giftcard money to my next purchase of a replacement Asus prime motherboard, and it all worked out successfully. Therefore, I had no issues with the protection plan service and recommend it to others.
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Reviewed in the United States on May 24, 2026
★★★★★ 4
Fast and easy but I dont trust the process to be fully automated.
The process was very smooth and fairly quick. The only challenge I had was that the CLAIM status showed complete but I had to manually go look up the status. There was no email or notification it was closed. After manually checking the status, I called customer support and they said since I called in, they would process the payout. I wonder if I didnt call in if they would have processed it? Also, the phone rep said they would issue me a amazon egift card but then the next day I received a email saying they mailed out the payout. Very poor communication but so far the process was easy and fast.
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Reviewed in the United States on April 1, 2026
★★★★★ 5
Simple and not Drama claim process.
’ve had Asurion coverage for a couple of years and never needed to use it until recently, when my pool salt cell (less than two years old) stopped working. I had purchased it with an Asurion protection plan, so I contacted them to start a claim.
The process was simple and straightforward to follow. In the end, they honored the plan and covered the cost of my salt cell based on the value when I originally bought it. They issued me a gift card that I could use on Amazon for that amount.
While prices have gone up and a new cell now costs about $200 more, it was still definitely worth having the coverage. Overall, I’m satisfied with how the claim was handled.
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Reviewed in the United States on June 8, 2026
★★★★★ 5
Love this protection plan
Quick and easy. My daughter's cracked her screen on her phone, as soon as it happened I went on the app, filed the claim. Ten minutes later I received the email with the shipping lable. The following day I dropped the phone off at ups and 4 hours later I received the digital gift card. Ive filed several claims since getting the protection plan and with four kids its definitelysomething im glad to have especially since i dont have to buy a protectionplan for each item now. I have filed claims for electric scooter the stoped working for no reason, my son's phone stopped charging, my oldest daughter cracked her phone screen, my son's video game controllers up and died and each time it was quick and easy and no fuss
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Reviewed in the United States on May 13, 2026
★★★★★ 1
Don't waste your money - these people will not help you
On March 9th 2024, I purchased a MCombo Lift Chair costing $785. On the same day, through the same Amazon account (my PERSONAL account since I also have a business account), I purchased an Asurion Complete Protect policy at the cost of $16.99 per month plus taxes. About one month ago, a problem arose with the chair that required me to make a claim using the "Complete Protect" policy that I had purchased for that very item. The claim was initiated on January 1st, 2025 - On January 3rd, I received an email asking me for photographs showing the damage for which I was making a claim. I sent those photographs via email to the address provided on January 6th. On January 27th, having not received ANY response from Asurion, I contacted them via phone and was told that my purchase had been made with a business account, that it was being used for business purposes, and was therefore not covered. I assured the Asurion Representative that it was most certainly not a business use, and that the chair that I was claiming for had been purchased because I had extensive shoulder surgery done that made it impossible to get in and out of bed. After speaking (unsuccessfully) with the Asurion Rep, I then contacted Amazon Customer Service. I spoke with an Amazon Customer Service Representative on the phone who confirmed that I had in fact used my personal account to purchase the chair and the Asurion Complete Protect policy. That representative went on to send a message to Asurion on my behalf confirming that the purchase was for personal use and not business use. Asurion responded, asking me to call them with the order number for the Asurion purchase. The number I gave was the exact same order number on my order history, however, the Asurion Rep could not find it. I was finally able to discover that the order number in Asurion's system was entirely different and isn't even in the same format as an Amazon order number.
Upon the Asurion representative finding my plan, she informed me that the chair was listed as being purchased for business use (despite Amazon confirming that it was NOT) but that I should give them "a couple of business days" to resolve the issue. Five business days later, still no response and so I called them again (Yesterday - February 1st 2025)... Lo and behold, I got the same crap yet again... the purchase was listed as business use and was therefore being denied, but she promised to remove the business use commentary and put the claim through again.
Today, February 2nd, I called Amazon yet again to escalate and had to call THREE times because the first two calls resulted in me finally being connected to an Asurion representative (two different reps) and each time, the Asurion representative hung up the phone as soon as my name was mentioned.
It has become clear to me that the Asurion "Complete Protect" policy is a SCAM - they will NOT take care of your issue, regardless of how long you've been paying. I have been paying every month since March 9th last year - so they've received over $170 from me thus far, with zero other claims, and if I am able to cancel right now, I will only receive $16.99 back. All I want, is the chair that I purchased the policy for coverage of, to be repaired or replaced. Asurion are NOT helping, and are actively avoiding contact.
At this point, I am considering legal action against Asurion for fraud - perhaps even a Class Action. I'll wait and see if my issue gets resolved within the next 10 days or so.
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Reviewed in the United States on February 2, 2025
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