Gabriel Ash Portico Series Greenhouse

For the gardener who wants the very best, the Gabriel Ash Portico Series Greenhouse is in a class of its own. Handcrafted in Britain from sustainable Western Red Cedar and endorsed by the Royal Horticultural Society (RHS), it’s a true heirloom structure — as beautiful as it is functional. The Portico’s signature feature is its elegant central porch, which provides a sheltered side entrance and gives the greenhouse its distinctive, architectural presence in the garden. This is a greenhouse you’ll treasure for decades.

Western Red Cedar is the ideal greenhouse timber. It’s naturally stable and long-lasting, often chosen for harsh climates where strength matters: when the cedar absorbs moisture, its naturally occurring preservatives are triggered and the moisture is quickly released, helping the wood resist rot and last for generations. All the cedar used is sourced from certified, sustainable forests, and every greenhouse is built using precision mortise-and-tenon joints with solid stainless steel and brass fixings — old-world craftsmanship built to endure.

 Why Choose the Gabriel Ash Portico Greenhouse

The Portico combines premium materials with intelligent design. It’s glazed in tempered safety glass for clarity and strength, and weather-protected with powder-coated aluminium details. The cedar roof is finished with hand-turned cedar caps and neoprene gaskets for extra weather sealing, while the steep-pitched roof sheds water and debris and adds dramatic height inside. An automated, heat-sensitive ventilation system runs the full length of the ridge, opening to release hot air at the most advantageous point — ideal for managing temperatures on warm Australian days without lifting a finger. The aluminium gutters and downspouts are designed to connect easily to rain barrels and water tanks, and the whole structure sits on its own aluminium plinth, raising it off the ground and providing a stronger fixing point to its foundation.

Key Features

• Handcrafted in Britain from sustainable Western Red Cedar
• Endorsed by the Royal Horticultural Society (RHS)
• Distinctive central porch design for a sheltered side entrance
• Tempered safety glass glazing
• Precision mortise-and-tenon joinery with stainless steel and brass fixings
• Automated, heat-sensitive full-length ridge ventilation
• Steep-pitched roof with hand-turned cedar caps and neoprene gaskets
• Powder-coated aluminium gutters and downspouts (rain-tank compatible)
• Raised aluminium plinth for a stronger foundation fixing
• Cedar base panels (or optional dwarf wall) and folding cedar staging available
• 12-year structural guarantee

H2: Specifications and What to Expect

• Frame: solid Western Red Cedar (sustainably sourced)
• Glazing: tempered safety glass
• Width: approx. 3.56m (around 11′ 8″), available in various lengths
• Ventilation: automated full-length ridge vents
• Base: aluminium plinth, with cedar base panels or dwarf-wall option
• Guarantee: 12-year structural

Please note: as a bespoke, made-to-order British greenhouse, the Portico is a special-order item with a lead time (typically around 90 days), and professional assembly by a contractor is recommended for the best result. We’re happy to discuss supply and installation. Browse our full greenhouse range and greenhouse accessories, or speak with our team for sizing, options and a quote.

H2: How It Compares

The Portico sits at the very top of the greenhouse market. Where premium aluminium-and-glass models like the Junior Victorian and Parkside offer elegant English styling in metal, the Gabriel Ash is built from solid timber — for gardeners who want the natural warmth, beauty and craftsmanship of a genuine wooden greenhouse. If you’re after a true heirloom statement piece and the finest materials, the Portico is the one; if you’d prefer lower maintenance and a lower price point, an aluminium-framed greenhouse may suit better.

H2: Foundation, Siting and Setup

A greenhouse of this calibre deserves careful siting and a proper foundation. Choose a level, well-drained, sunny spot, orienting the longer side toward the sun’s path. The aluminium plinth provides a strong fixing point to a prepared base (such as concrete or treated timber). Because it’s a substantial structure, check with your local council about whether a building or planning permit is required before you build. For siting and orientation guidance, the Australian Government’s Your Home guide is helpful, and the Bureau of Meteorology can help you plan around local sun, wind and frost.

H2: What to Grow

With a bright, climate-controlled glass environment and automated ventilation, the Portico is perfect for growing year-round — vegetables, flowers, seedlings, and tender or exotic plants through the cooler months. For season-by-season advice tailored to Australian conditions, Gardening Australia is an excellent, trusted resource.

H2: Frequently Asked Questions

What is the Portico made from? Sustainable Western Red Cedar, assembled with precision mortise-and-tenon joints and stainless steel and brass fixings, glazed with tempered safety glass.

What makes the “Portico” design distinctive? Its central porch, which provides a sheltered side entrance and gives the greenhouse its elegant, architectural look.

Does it ventilate automatically? Yes — a heat-sensitive ventilation system runs the full length of the ridge and opens automatically to release hot air.

Is it endorsed by anyone? Yes — it’s part of Gabriel Ash’s RHS-endorsed collection and comes with a 12-year structural guarantee.

How is it delivered and assembled? As a made-to-order British greenhouse, it’s a special-order item with a lead time, and professional assembly is recommended. Contact us to discuss supply and installation.

H2: Conclusion

Beautiful, enduring and impeccably crafted, the Gabriel Ash Portico Series Greenhouse is the finest wooden greenhouse you can own. With sustainable Western Red Cedar, tempered glass, automated ventilation, a distinctive porch entrance and a 12-year guarantee, it’s a true heirloom that will grace your garden and serve your gardening for generations. Get in touch with our team for sizing, options and a quote today.