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Alton Westminster Greenhouse

$24,500.00$27,999.00

  • Grand Wooden Greenhouse Design: Expansive structure with half wooden panels creates a striking focal point while maximizing space for both growing and relaxation.
  • Premium Cedar & Aluminum Build: Crafted from Western Red Cedar with an aluminum base frame for natural beauty, durability, and resistance to rot.
  • High Roof Pitch for Practicality: The steep roof pitch, combined with the 11′ peak height, allows snow to slide off easily, making it ideal for snowy regions and ensuring year-round usability.
  • Superior Insulation & Stability: Toughened glass panels and aluminum bar capping enhance insulation and stability, preventing rattling and providing a secure growing environment.
Product price: $24,500.00
Order total:
Alton Westminster Wooden Greenhouse in a backyard
Alton Westminster Greenhouse
$24,500.00$27,999.00

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Expand your gardening horizons with the Alton Westminster Greenhouse – a stunning structure that offers both the extra space and timeless beauty needed to create a truly remarkable garden retreat.

With an impressive 11ft width and height, the Westminster creates a grand, open interior perfect for those looking to maximize their growing potential while enjoying the serenity of their outdoor space. This premium greenhouse is designed to deliver the best in both form and function, ensuring years of satisfaction.

Distinctive Greenhouse Design

The Alton Westminster Greenhouse stands out with its wider and taller profile, giving it a stately presence in any garden. The combination of half-paneled wood and expansive glass exudes timeless appeal, blending seamlessly with nature while offering plenty of light and room for growth. The steep roof pitch is not only visually striking but also practical – allowing snow to slide off easily, making it an excellent choice for gardeners in colder climates. The spacious interior and ample headroom make this greenhouse perfect for both cultivation and relaxation, providing an inviting space to immerse yourself in your garden.

Durable Construction

Constructed with 100% Western Red Cedar and an aluminum base frame, this greenhouse is built to endure. Western Red Cedar is an ideal material for greenhouses because it absorbs moisture without warping and dries quickly, maintaining its structural integrity. The wood is naturally resistant to rot due to its high content of preservative oils, which also emit a pleasant aroma that deters insects and pests.

Additionally, the use of thick glazing timber bars (44x44mm and 44x69mm) provides exceptional strength and stability, unlike many modern greenhouses that have reduced thickness to cut costs.

The aluminum base frame prevents direct contact with the ground, minimizing the risk of early rot and extending the greenhouse’s lifespan. Over time, the cedar will age beautifully to a silvery grey, enhancing its natural appeal.

Close-up photo of the aluminum base with wooden panels sitting on top
Rendering of the joint system of an Alton Cedar Greenhouse

Superior Jointing System: The clever mortice and tenon jointing system simplifies assembly while adding strength to the framework, ensuring a sturdy, long-lasting structure.

Quality Glazing: Equipped with 3mm toughened safety glass, the Alton Westminster Greenhouse offers panes that are 5-7 times stronger than standard horticultural glass. These large panes not only enhance the structure’s rigidity but also shatter into small, rounded pieces if broken, reducing injury risk. The glass fits tightly within the cedar frame, ensuring a secure environment for your plants while providing durability and safety.

Toughened Glass and durable wooden framing of the Alton Cedar Greenhouses
Bar capping on an Alton Cedar Greenhouse

Enhanced Insulation & Durability with Bar Capping: The aluminum bar capping system tightly grips the glass, integrating it into the greenhouse’s strength to prevent rattling and create a more stable structure. Rubber seals between the glazing and aluminum improve insulation, while the Moss Grey color complements the cedar as it ages.

The natural insulating properties of cedar help reduce temperature fluctuations, creating a more stable growing environment. Historical studies have shown that wooden greenhouses, like Alton’s, produced heavier crops with less watering and required less heating than aluminum models, showcasing their superior thermal efficiency.

Superior Ventilation

Two roof vents with automatic openers and two large louver vents provide excellent airflow, preventing heat buildup and promoting a healthy environment. The automatic openers use heat expansion to gradually open the vents as temperatures rise, fully adjustable to help you maintain the perfect growing conditions without manual effort, enhancing your gardening experience.

Elegant Accessibility

The lockable double-hinged doors with a low-level threshold and tall eaves provide easy access and ample headroom, combining practicality with refined style.

Sustainable Water Management

The Alton Westminster Greenhouse features an integrated aluminum gutter system with UPVC downpipe for efficient rainwater collection and reuse, promoting sustainable gardening practices.

Over 100 Years of Excellence in Greenhouse Craftsmanship

With over a century of experience, Alton Cedar Greenhouses has been a leader in the industry since 1921. Focused on high-quality materials and thoughtful design, Alton greenhouses are crafted to meet the needs of passionate gardeners, ensuring durability, functionality, and aesthetic appeal. Their commitment to excellence is evident in every detail, making their greenhouses a valuable addition to any garden and a lasting investment for any gardener.

Exaco Trading: Synonymous with Quality & Customer Care

As an authorized dealer, we offer Exaco Trading’s premium garden products, including the new Alton Cedar Greenhouses. Exaco stands out for its exceptional European craftsmanship. Their commitment extends beyond sales to outstanding customer service, ensuring a seamless and gratifying experience for every customer.

Expand your outdoor space with the Alton Westminster Greenhouse – where timeless design and exceptional craftsmanship come together to create an inspiring and functional garden sanctuary.

Interesting setup of Alton Westminster

If you are interested in a different size, don’t hesitate to call or email us. Here are some other available sizes:

Product Details

  • Classic greenhouse design with half wooden panels
  • 11-foot tall design maximizes usable space
  • Frame material: Western Red Cedar & Aluminum
  • Western Red Cedar benefits:
    • Better insulation than aluminum
    • Less temperature & humidity fluctuations (creating a more stable growing environment)
    • Naturally rot-resistant due to its high content of preservative oils, which also deters insects and pests
    • Absorbs moisture without warping and dries quickly
    • Long life with little maintenance
  • Glazing material & thickness: 3mm toughened glass
  • Glass sits tightly in a wood frame (no rattling)
  • Aluminum base frame keeps wood off the ground and reduces chances for early rot
  • Aluminum caps on roof glass create a better seal for increased insulation and elongate lifespan of wood
  • Door: Lockable single hinged door with low threshold (28″ x 6’7″)
  • Tall door opening and eaves for superior headroom
  • Roof vents (24″ x 19″)  come with automatic openers
  • Louver windows (31″ x 41″) come with manual openers
  • Rainwater gutter system: Yes – aluminum gutter with UPVC downpipe

Included in Alton Westminster Wooden Greenhouse kit:

  • Framing, glazing, and hardware
  • Base frame and aluminum capping
  • 1x hinged door with keys
  • 11×17: 4x roof vents with auto openers, 3x louver vents
  • 11×19: 5x roof vents with auto openers, 4x louver vents
  • 11×21: 6x roof vents with auto openers, 4x louver vents
  • Assembly guide (also available here)

Specifications

  • Insulation rating:
    • 3mm Glass: .95 R-Value
    • Red Cedar: 1.35 R-Value
  • Frame color: Natural Wood & Moss Green (capping)
  • Sidewall height: 5’7″
  • Peak height: 11’1″
  • Dimensions:
    • 11×17: 10’9″ wide x 16’8″ long (Floor space: 179 sq.ft.)
    • 11×19: 10’9″ wide x 18’9″ long (Floor space: 202 sq.ft.)
    • 11×21: 10’9″ wide x 20’10” long (Floor space: 224 sq.ft.)
  • Foundation frame: Yes – Aluminum base frame keeps wood off the ground and reduces chances for early rot
  • Expandable: No
  • Average assembly time:
  • Warranty: 10 years on framing
  • Made in UK

Optional accessories

  • 2 Slat Staging Shelf
  • 4 Slat Staging Shelf
  • Victorian Ridge Crest

Shipping Information

This product is delivered via LTL which is curbside delivery only. The driver will be using a pallet jack and liftgate to slide the crate off and will need help from the customer with the unloading of the framing boxes. We recommend having a couple of people there for the delivery.