Aluminium Greenhouse

Aluminium Greenhouses for sale at great prices with New Zealand wide home delivery.  We only offer you aluminium greenhouses that we've tested, and would be happy to have in our own gardens. Our huge selection of aluminium greenhouses offer a great range of features, quality and practicality for gardeners of all different budgets and requirements. Aluminium greenhouses are maintenance-free, prepared for use for many many years. It is also very easy to replace spares for your greenhouse if you need them.

Steelmates Aluminium greenhouses are available in a variety of styles and sizes to suit different needs and preferences. All of our kitset greenhouses are designed to be freestanding structures, while other greenhouses NZ are lean-to models that attach to an existing building. Aluminium is a popular choice for polycarbonate greenhouse framing because it is lightweight, durable, and resistant to rust and rot. 

Below you'll find aluminium greenhouses with twin wall polycarbonate sheets. We offer small aluminium greenhouses from 8ft x 7ft all the way up to 10ft x 30ft. Longer greenhouse are also available, please enquiry if you need something larger than usual. 


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Steelmates Greenhouse Features

Our greenhouse range is well designed with the following features

  • Wind Resistant

    Most garden greenhouses are glazed with the wile-clip method, which involves clipping the plastic sheeting directly to the frame. However, this is not ideal for use in windy conditions. Our slot-in greenhouse has a good anti-wind performance, it keeps your greenhouse insulated and stable, even in harsh weather conditions, which is a better choice for New Zealand customers.

  • Rainwater Collection

    Our greenhouse is designed with sustainability and the environment in mind. Its features allow you to collect and recycle rain to water your plants. This means less water is wasted and our planet benefits.

  • Easy Maintenance

    We provide a 3-year warranty for the panel and a 5-year warranty for the frame. Besides, the screws and nuts are stainless steel, which makes the greenhouse easy to maintain.

  • Premium Material

    Compared with glass material, our greenhouse is made of polycarbonate sheets that are lighter, and tougher. The thickness of the sheets is up to 6 mm, which makes the polycarbonate greenhouse more durable and stable. Besides, the light gets more evenly distributed to what would be darker areas in your greenhouse, which ensures your plants enjoy enough sunlight and grow lushly.

Greenhouse FAQ

Answer common questions about the aluminium greenhouse. Can't see it? Try searching keywords.

WHAT IS THE BENEFIT OF HAVING A GREENHOUSE?

The Steelmates greenhouses extend your growing season, add a variety of plants, and protect them from all weather conditions. 

IS THE POLYCARBONATE SHEET UV TREATED?

All Steelmates greenhouses come with UV treated polycarbonate sheets. 

WHAT TOOLS ARE NEEDED TO ASSEMBLE STEELMATES GREENHOUSES?

With our smart design, Steelmates greenhouses are assembled with a single wrench. No holes need to be drilled. An impact wrench will definitely speed up the process. 

DO YOU HAVE ONE ON DISPLAY?

Yes, we have a fully assembled greenhouse on display in our Auckland store. 

HOW EASY IS IT TO ERECT A STEELMATES GREENHOUSE

All Steelmates greenhouses come with easy to follow step by step instructions. No special tool or skill needed. If you don't have time, we also have contractors who can assemble for you nationwide.

WHAT IS THE BASE MADE OF?

The Steelmates greenhouses do come with a base, you can plant out of ground inside. You can add the foundation kit with your greenhouse, with the foundation kit, it saves a lot of effort to make the base of the greenhouse leveled and square.

DO YOUR GREENHOUSES COME WITH FOUNDATION?

All of our greenhouse comes with a foundation frame with 4 pegs.

WHAT IS THE THICKNESS OF THE POLYCARBONATE PANELS?

They come in 4mm or 6mm depending on the model

WHAT IF I NEED A REPLACEMENT PANEL?

We can supply replacement polycarbonate sheets to our customers.

HOW DO I PREVENT OVERHEATING IN MY GREENHOUSE DURING THE SUMMER?

Use manual vent to allow ventilation. You can also add auto vent opener at additional cost.

WHAT ARE THE ADVANTAGES OF GREENHOUSE FARMING?

Extended Growing Season: greenhouse enable you to extend the natural growing season of various plants, providing opportunities for year-round cultivation.

WHAT TYPES OF PLANTS CAN I CULTIVATE IN A GREENHOUSE?

Our greenhouses offer a perfect environment for a diverse array of plants, from common vegetables like tomatoes and cucumbers to exotic flowers and herbs. This controlled setting allows for consistent gardening success throughout the year.

WHAT ARE THE DIFFERENT TYPES OF GREENHOUSES AVAILABLE?

We offer a variety of greenhouse structures, including glass, polycarbonate panels, and plastic film options:

Glass: Offers durability and clear visibility but can reduce thermal efficiency.

Polycarbonate: Provides excellent insulation and is impact-resistant, although it may require replacement over time due to wear.

HOW DO I SELECT THE IDEAL LOCATION FOR MY GREENHOUSE?

Choose a location that receives ample sunlight, ideally with the longest side of the greenhouse facing north to maximize light exposure. Ensure the site is sheltered from strong winds to protect the structure.

IS A PERMIT REQUIRED TO BUILD A GREENHOUSE?

Generally, building a small to medium-sized greenhouse does NOT require a permit, but we recommend checking local regulations to confirm.

HOW CAN I PREVENT MY GREENHOUSE FROM OVERHEATING IN THE SUMMER?

Our polycarbonate greenhouses are designed with manual vents to promote adequate ventilation. We also offer automatic vent openers to help manage internal temperatures effectively during warmer months.

WHAT WARRANTY OPTIONS ARE AVAILABLE FOR YOUR GREENHOUSES?

Our greenhouses come with a comprehensive warranty—5 years for the frame and 3 years for the polycarbonate panels. For more details, please review our Terms & Conditions.