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Description
Forest Garden Xtend 4 x 3.42m Insulated Garden Office with 1/4 WindowForest Garden Xtend 4. 0M 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 15 year
Forest Garden Xtend 4.0M
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): Single
- Number of Windows: 2 (fixed), 1 (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
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 19 reviews
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Product Reviews
★★★★★ 5
Holds up! Good thrower!
Good quality! Throws far! Love this brand!
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Reviewed in the United States on April 10, 2026
★★★★★ 4
Almost Perfect
If you’ve ever seen these things, the foldable ones are just as good as the standard ones. I just wish when you folded it up there was a way to lock it into that position. When you unfold it to play, you lock it into place with the orange locking slide so it doesn’t fold up on you. But when you’re done playing and fold it up, there’s no way to lock it into that position, it can keep unfolding if you carry it around with you, plus the orange locking slide keeps sliding up and down. It’s not a huge deal, but they could’ve made it better.
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Reviewed in the United States on April 29, 2026
★★★★★ 5
Helpful
I’ve used Chuckit ball launchers, this one is foldable, great for my back pack when camping with my dog
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Reviewed in the United States on February 27, 2026
★★★★★ 5
Best toy, the end
Style: Sport, Size: 12in, Style: Sport, Size: 12in
Combined with the Max Glow ball, this is the best dog toy available on modern planet Earth.
I have a burly 92lb. pit bull mix with highly developed prey drive, and she will chase the glow ball for hours if I let her.
The tiny sport launcher (Sport 12M) is the best, because you can still throw the ball really far, but you can also slam the ball down a few feet away from yourself so it bounces up in the air and your dog has to jump to catch it, or you can throw it up really high so it bounces 15' away or so and your dog can jump to catch it. We sometimes have to play fetch in a pretty small area, so it's nice to have the small launcher for these games. The larger launchers aren't as fun in small areas. You can play the same games but it's trickier to throw the ball correctly.
Also, the small launcher is a lot easier to carry. The small launcher fits in my dog-walk-stuff backpack (with the ball in the launcher so I don't have to dig for it later), but the big ones don't easily. The launcher also has a hole in the end so you can hang it from your bag or whatever with a carabiner. The big ones are too long for that in most cases, and swing back and forth.
Also-also my dog loves to ask for the launcher, then when I give it to her she plays keep-away and it's adorable. The big launcher I have is harder for her to balance in her mouth, so she just lays down and chews on it until it gets taken away. She's chewed on all of the four Chuck Its we've owned, but she's only broken one (a big one), but that's because she got ahold of it when no one was home. The little one in my bag is totally chewed up but still works great. I think they're sturdier than the big ones. Except for the launcher she chewed into pieces, which was our fault, the only reason we've had to replace anything was because we lost it. Usually we keep the launcher and ball in the backpack so she can't get to them and so they don't get lost, so we rarely have to replace them. There is just not a better value in toys, and the startup price is really low.
Once again I really recommend the glow ball! It doesn't get soggy no matter how wet the grass or the dog mouth is. It is fun to chase because it is slippery and it collapses when it's squeezed, so it pops out of the dog's mouth and flies away if they bite it at the wrong angle; it's really bouncy, and stays bouncy because it can't be popped; it whistles so you can usually hear it even if you can't see it; and it really glows enough for nighttime catch, even if you only have your cellphone flashlight to charge it up!
UPDATE:
I should have said, we have the 12M launcher, which means the handle is 12 inches long and it uses a medium-sized ball. The medium ball is 2.5 inches in diameter, so the launcher will fit regular tennis balls, too! But my dog won't play with regular tennis balls anymore because they aren't anywhere near as fun as the glow balls, and I think she doesn't like having gross sloshy muddy tennis balls in her mouth.
I lost my short launcher awhile back and could only get a long one locally to replace it, which reminded me that you have to lean over a lot further to use the short launcher. So if you have trouble leaning over to the point that your hand is a foot above the ground, this may be hard for you to use.
I wish Amazon would let us choose colors, because my old one was green, and the big one is orange, both of which are bright enough to see in the grass from far away, even at night.
Still, best toy!
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Reviewed in the United States on May 19, 2017
★★★★★ 5
Highly recommend.
Style: Sport, Size: 12in
Love this. Dog sitting for a dog that loves to chase balls but my shoulder doesn’t like throwing them. Got this yesterday and it’s perfect. Real arm/shoulder saver.
Seems sturdy and I was concerned that a standard tennis ball would not work. We tend to lose balls when walking because this lab insists on carrying the ball in its mouth. They work.
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Reviewed in the United States on March 22, 2026