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Exaco Janssens Modern M23 Sloping Roof Greenhouse 8x10x9 ftYour Personal Oasis With The Exaco Modern M23 Greenhouse Looking for a greenhouse that's a bit different? The Modern Greenhouse ditches the traditional English look for a sleek, one sided sloping roof. This not only gives it a modern vibe but also adds an extra layer of glass for more. Whether you've been gardening forever or are just starting out, this greenhouse is a great fit. It's built to last, so it's a smart buy that will make your backyard
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Your Personal Oasis With The Exaco Modern M23 Greenhouse

Looking for a greenhouse that's a bit different? The Modern Greenhouse ditches the traditional English look for a sleek, one-sided sloping roof. This not only gives it a modern vibe but also adds an extra layer of glass for more.

Whether you've been gardening forever or are just starting out, this greenhouse is a great fit. It's built to last, so it's a smart buy that will make your backyard even better. The extra sunlight and flexible design make it the perfect place for your plants to thrive.

Exaco Janssens M23 modern greenhouse featuring a sloping roof, with a dog resting inside near white garden chairs.

Enjoy Fresh Produce Daily In Your Modern Greenhouse

  • Year-Round Growing: Extend your growing season and enjoy fresh produce all year long.
  • Sleek Design: A modern sloping roof maximizes sunlight and ventilation, making it perfect for year-round gardening.
  • Superior Strength: extra-thick aluminum profiles and stainless steel hardware for a long-lasting structure.
  • Weatherproof: 4mm tempered glass withstands extreme weather and provides superior insulation.
  • Simple Assembly: Pre-cut and pre-drilled parts, plus an included foundation frame, make setup a breeze.
  • Beautiful Look: Large single-piece glass panels create a clean, modern aesthetic.
  • Pest and Draft Protection: Heavy-duty rubber weather seals keep unwanted guests out.
  • Safety Tested: Tempered glass is TUV and GS tested for your peace of mind.

Seize this fantastic deal and enhance your garden with a resilient, stylish, and easy-to-assemble greenhouse. Order yours today!

Modern Exaco Janssens M23 greenhouse for vegetables, with a sloping roof, situated in a vibrant garden ready for planting.

What's Included in the Box?

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1 Set of Double Hinged Doors

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2 Roof Vents, 2 Push Out Side Windows, 1 Louvre Window

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1 Automatic + 1 Spindle (Roof), 1 Automatic (Louvre)

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Gutters with Downspout

Specs of the M23 Sloping Roof Modern Greenhouse

Size 7ft 9in x 10ft 2in x 8'10in
Sidewall Height (shorter side) 6'8"
Peak Height (Taller Side) 8' 10"
Area 79 sq. ft.
Color Black (RAL9005)
Glazing 4 mm tempered glass, 7 times stronger than garden glass, TUV & GS tested
Windows Installation Substantial rubber seals for better insulation, not metal clips
Glass Configuration Single sheets, no overlapping smaller sections
Included Features Gutters with downspouts
Foundation Requirement Perimeter foundation; corners recommended to anchor in concrete
Additional Requirements (if applicable) Drop door kit for stem wall installation, glass panel for door gap
Assembly Recommendation Use scaffolding during assembly
Brand Janssens
Warranty 15 Year Limited Warranty
Doors 1 Set of Double Hinged Doors
Windows 2 Roof Vents, 2 Push Out Side Windows, 1 Louvre Window
Window Openers 1 Automatic + 1 Spindle (Roof), 1 Automatic (Louvre)

Go Beyond the Basics, Accessories to Help Your Garden Thrive

Maintain the perfect growing environment year-round with climate control options like shade curtains, fans, and heaters. Maximize your growing space and organization with shelves, hooks, and specialized grow lights. Enhance your greenhouse experience with practical features such as wheelbarrow ramps and automatic window openers.

Grow More with Organized Shelving

Top shelf of a Royal Victorian Greenhouse with dark green frame and clear polycarbonate panels, reflecting lush foliage outside.

Top Shelf

This sturdy top shelf adds space to your greenhouse so you can store tools, pots, or show off your prize-winning blooms. Available in dark green or black, it's the perfect way to make your greenhouse more functional and stylish, measuring 10' L x 4" W

Elevated greenhouse staging with green frame and white tray liner, ideal for seed starting and plant propagation.

Bottom Shelf (Seed Tray)

This shelf with it's size of 10' L x 20" W x 4" D is perfect for starting seeds, propagating cuttings, or organizing small plants. Corrugated plastic bottom provide ample space and drainage. Choose from classic dark green or sleek black to match your greenhouse aesthetic.

Exaco Royal Victorian Slat Shelving 2 slats in black

Slat Shelving - 2 & 5 Slats

Expand your growing space with our affordable slatted shelving, designed to fit all Victorian Greenhouses. Choose from a 2-slat (9"W x 59"L) or 5-slat (21"W x 59"L) configuration, both available in black or dark green.

Customize Door for Effortless Access

Janssens Royal Victorian Greenhouse with stylish black frame and glass panels, furnished as an outdoor living space with a fire pit and wicker furniture.

Sliding Doors - Single or Double Configuration

Choose the perfect entryway for your greenhouse with a single or double door in a matching black or green finish. Both sizes offer a low threshold option for easy access.

Note: Original doors still come with the greenhouse—you must request their removal.

Janssens Greenhouse Double Hinged Door - perfect for wide entryways and easy access in your backyard greenhouse.

Hinged Double Doors Configuration

Create a welcoming entry to your greenhouse with a double hinged door featuring a low threshold for easy access. Available in black or green to complement your greenhouse's style, these doors come with locks for added security.

Janssens Greenhouse Double Hinged Door with black frame and glass panels - easy access and wide entryway for your backyard greenhouse.

Drop Door Kit for Hinged Doors & Sliding Doors

Allows Modern greenhouse on a 20"-36" wall (24" recommended). Glass panels not included; purchase locally. Extra polycarbonate available for cutting. Use "Lowered Threshold" for dropped doors. Provide exact wall height for accurate cutting.

Exaco Royal Victorian Lowered Threshold Sliding Door Installation Guide

Low Threshold for Sliding Door

The 2025 Lower Threshold Kit for Janssens Royal Victorian greenhouses lowers entry to 1¼", improving access. Bottom-only design; cut for singles or buy two kits for double sliding doors.

Photo of the Door Stopper installed in the bottom of the door.

Hinged Door Stopper

Durable black door stop with built-in latch holds doors securely open. Standard with original hinged doors unless alternate hardware is chosen.

Photo of the Auto closer installed at a green door.

Hinged Door Auto Closer

Commercial-style auto closer with adjustable arm gently pulls doors shut. Fits greenhouses on knee walls; allows up to 120° opening for safety and convenience.

Black magnetic hinged door holder mounted on a greenhouse stem wall, keeping the door open at a 90-degree angle.

Magnetic Hinged Door Holder

Perfect for greenhouses on stem walls, this sturdy magnetic holder keeps hinged doors open at 90°. Easy to use, reliable, and highly effective in windy conditions.

Easily Manage Temperature in Your Greenhouse with Windows and Vents Upgrades

Exaco Royal Victorian greenhouse with adjustable louvre window for ventilation and temperature control.

Additional Louvre Window

Features 11 glass panels and is manually operated to control airflow and temperature in your Modern greenhouse. An automatic opener is also available for added convenience.

 Exaco Greenhouse Fly Screen for roof vent, keeps pests out while allowing airflow for optimal plant growth.

Louvre Window Fly Screen

Easily attach this factory-assembled fly screen to the outside of your louvered windows with a simple clip. No tools required! Available in green or black.

Person adjusting a partially open louvre window cover with transparent panels, showcasing indoor privacy and outdoor visibility

Louvre Window Cover

During the winter months, the louvered window is covered by a 40" x 28" piece of 4mm thick clear Lexan. Watch installation here.

Janssens Automatic Louvre Vent Opener for greenhouses, regulating temperature and airflow for optimal plant growth.

Automatic Louvre Windows Opener

A black paraffin-filled tube opens and closes the louvre window at 72°F, opening up to 14 inches and closing with a heavy spring as the temperature drops.

Exaco Royal Victorian greenhouse with push-open side window for ventilation.

Push Open Side Windows

Increase ventilation in your greenhouse with a push-open side window, hinged at the top for easy operation. Available in dark green or black, it includes an extra glass panel and measures 40 ½” x 30 ½” to fit seamlessly into your side wall.

Janssens Greenhouse Louvre Window with Fly Screen for ventilation and pest control

Push Out Side Window Fly Screen

Easily install this factory-assembled fly screen inside your push-out window. Available in green or black, it features a brush seal opening for the window device.

Exaco Royal Victorian greenhouse roof vents open for ventilation, with sunlight shining through.

Additional Roof Vents

Every Modern greenhouse includes at least one roof vent for ventilation. You can add more vents to customize your greenhouse climate. All vents are available in dark green or black and measure 30 ½” x 32 ½”.

A detailed view of a Janssens Greenhouse showcasing the automatic roof vent in an open position, and the fly screen protecting the interior.

Roof Vent Fly Screen

Factory-assembled fly screen for roof vents, easily installs underneath the vent window and comes with brush seals that allow compatibility with automatic or manual openers. Choose from green or black frames.

Exaco Royal Victorian Automatic roof vent opener for greenhouses, regulating temperature and airflow for optimal plant growth.

Automatic Roof Window Opener

Automatically regulate the temperature in your Modern greenhouse with this black paraffin-filled tube opener. No electricity needed, it expands at 72°F to open the window up to 14 inches and closes with a heavy spring when it cools.

Janssens Greenhouse Manual Roof Window Opener with stainless steel arm and gold-colored fittings.

Manual Roof Window Opener

Manually open your Modern greenhouse roof window with this stainless steel threaded screw opener. A long handle is required for operation (not included).

Perfect Climate with Janssens Modern Greenhouse Add-Ons for Consistent Growing

Retractable shade system for Exaco Janssen Modern and Royal Victorian greenhouses, provides temperature control and protects plants from excessive sunlight.

Retractable Roll-Up Shades

Easily adapt to any weather with retractable aluminum weave curtains for roofs and side walls.

Click here to know more what's suitable for your greenhouse!

Exaco Janssens Royal Victorian VI Accessory Kit vi23, vi34, vi36 & vi46 cloth shade

Shade Curtains

This cream shade curtain is tailor-made for your Modern Greenhouse. It provides full coverage and easy installation with built-in loops and included hardware. Durable and elegant, it protects your plants while enhancing your greenhouse's look.

Exaco RIGA Portable Milkhouse Heater product image

Uline Milkhouse Heater

A 110–120V, 1500W heater with three settings: Fan Only, 1300W, and 1500W for flexible climate control.

Exaco Peco Thermostat

Peco Thermostat

PECO TF115P-002: weatherproof greenhouse thermostat. Easy dial control, plug-and-play 110/120V, switchable cooling & heating, built for humidity.

Exaco

Solar Exhaust Fan

Solar-powered greenhouse exhaust fan kit with 50-watt solar panel, 16" CE-approved fan, thermostat, and 20-foot cord. No batteries required. Lifetime warranty on the brushless motor. 31 lbs total weight.

Exaco Victorian Greenhouse Exhaust Vent with Fan for optimal temperature control and ventilation.

Exhaust Fan

The exhaust fan keeps fresh air moving in your greenhouse for a healthier growing environment. For easy setup, pair with the Lexan panel. Add a thermostat to automate it—otherwise, it runs continuously.

Automated aluminum louver Exaco Modern greenhouse vent for temperature and humidity control.

Intake Shutter Vent

Automated aluminum louver greenhouse vent for temperature and humidity control.

Transform Your Greenhouse into an Oasis with These Must-Have Additions

A solar-powered LED light mounted on a white wall.

Solar Powered Light

Eco-friendly solar LED light for greenhouses/sheds. 250 lumens, 4 hrs runtime, cool white 6000K. Easy install, weather-resistant, 2-yr warranty. Not a grow light. 

Exaco Astrica Grow Light LED fixture designed for greenhouse use, providing full-spectrum lighting in a slim, energy-efficient housing.

Astrica Grow Light

Boost growth with the ASTRICA 45W Interlight LED. F3 spectrum, 112 μmol/s, 2.5 μmol/J efficiency. Durable IP65 build, link up to 12 units for scalable, energy-efficient greenhouse lighting. Please let us know if you are stringing units together - it needs different cables.

Exaco Victorian Greenhouse scroll supports provide additional structural reinforcement and visual appeal to your greenhouse.

Scroll Supports

Boost the strength and style of your 20+ foot greenhouse with this three-piece dark green scroll support set. Includes two shoulder supports and one roof support. Note: curtains cannot be drawn past the scroll supports.

Close-up of Exaco Victorian greenhouse roof bracing system with metal rods and turnbuckle.

Roof Bracing

Roof Bracing with adjustable turnbuckle, made of 2 flat bars (~41" x 0.75" x 2mm). Adds strength to greenhouses. Available in aluminum, green, or black finishes.

Exaco Victorian Greenhouse Wheelbarrow Ramp for convenient greenhouse access.

Wheelbarrow Ramp

 Made from durable solid rubber, its 49cm width, 31cm length, and 10cm height provide a smooth transition for easy loading and unloading.

Victorian greenhouse adjustable metal hooks for hanging plants and accessories.

Stainless Steel Plant Hooks

This set of 5 hooks has a T-bolt head that fits into greenhouse frame channels without modifications. The adjustable design allows you to customize the hanging height.

 A pile of stainless steel T-bolts and nuts for greenhouse assembly.

Scroll Supports

Stainless steel hammerhead bolts and nuts for aluminum frame channels. Set includes 20 bolts and nuts, 6mm heads, in 12mm or 15mm lengths.

Introducing the Modern Greenhouse

Modern Greenhouse Assembly Guide Videos

Exaco Janssens Modern M23 Sloping Roof Greenhouse 8x10x9 ft

Item no : 10284195532
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