greens westminster hollandrad Westminster Cedar Half-Boarded Greenhouse – Planet Greenhouse

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.

Features

• 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
• 10'9" x 16'8": 4x roof vents with auto openers, 3x louver vents
• 10'9" x 18': 5x roof vents with auto openers, 4x louver vents
• 10'9" x 20'10": 6x roof vents with auto openers, 4x louver vents
  

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