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3m x 6m The Ultimate Greenhouse 6mm Twin Wall

Awaiting stock, shipping soon

AKL ETA: End Oct

DTGH-A3AC1-AKL

  • Excellent Insulation: Polycarbonate panels provide superior heat retention compared to glass
  • Optimal Ventilation: More vents than any other greenhouse on the market
  • Stainless Steel Fasteners: Longer life and better durability

Regular price $2,869.00
Sale price $2,869.00 Regular price
Tax included. Shipping calculated at checkout.
Stock Location
Select the nearest warehouse for accurate shipping rates. Stock status is shown above. Pre-Order items can still be ordered on backorder.

Dimensions

External Dimension (mm)

3000 x 5950

Length/Depth (mm)

5950

Width (mm)

3000

Peak Height (mm)

2500

Door Height(mm)

1840

Door Opening (mm)

1170

Wall Height (including foundation)

1460

Area

17.85

Materials

Panel Thickness (mm)

6

Structure

Number of Doors

2

Number of Vent

8

Warranty

Frame Warranty

5 Years

Panel Warranty

3 Years

-

View our warranty details.

Assembly

Assembly Required

Yes

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Delivery FAQ

Ultimate 6mm Twin Wall Aluminium Greenhouse | 3 × 5.95m

Create a spacious and practical growing environment with this Ultimate 6mm Twin Wall Aluminium Greenhouse. Designed with premium raw polycarbonate panels and a heavy-duty first-grade aluminium frame, it combines excellent light transmission, durability, and practical ventilation for everyday gardening.

The greenhouse features 6mm twin wall polycarbonate panels made from high-quality raw materials. Its 1.5mm powder-coated aluminium frame provides a durable, low-maintenance structure, while stainless steel bolts and nuts offer a durable alternative to zinc-coated fasteners.

Ideal For

Perfect for growing and protecting:

  • Vegetables
  • Herbs
  • Flowers
  • Seedlings
  • Other garden plants

The spacious 3 × 5.95m footprint provides ample room for a wide variety of plants, pots, and gardening activities.

Why Choose This Greenhouse?

Designed with practical features for comfortable everyday gardening, this greenhouse offers:

  • Premium raw 6mm twin wall polycarbonate panels
  • Heavy-duty 1.5mm powder-coated first-grade aluminium frame
  • Excellent light transmission
  • Low-maintenance aluminium construction
  • Slotted channel panel fixture
  • Double sliding doors with a 1170mm opening for easy access
  • Roof vents for ventilation
  • Stainless steel bolts and nuts
  • Easy-to-assemble design
  • Free foundation kit included
  • 5-year guarantee on frames
  • 3-year guarantee on 6mm polycarbonate panels

Installation Notice

Proper anchoring is essential for safe installation.

Where possible, install the greenhouse in a sheltered location.

Greenhouses should not be installed in exposed locations that experience frequent strong winds.

Severe weather, storms, and extreme wind conditions may damage the greenhouse regardless of installation quality.

Specifications

Colour:
Green

Overall Dimensions:
3000 (W) × 5950 (L) × 2500 (H) mm

Door Width:
1170 mm

Frame Material:
1.5mm Powder-Coated First-Grade Aluminium

Panel Material:
6mm Twin Wall Polycarbonate

Door Type:
Double Sliding Door

Ventilation:
Roof Vents

Fasteners:
Stainless Steel Bolts and Nuts

Foundation Kit:
Included

Warranty:
5 Years on Frames / 3 Years on 6mm Polycarbonate Panels

Package Size:

  • Carton 1: 180 × 18 × 75 cm
  • Carton 2: 308 × 25 × 25 cm
  • Carton 3: 178 × 10 × 70 cm
  • Carton 4: 308 × 23 × 23 cm

Total Weight:
180 kg

Package Includes

  • 1 × Greenhouse
  • 1 × Foundation Kit
  • 1 × User Manual

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See How Our Greenhouse Is Built

An independent YouTuber shows exactly how our greenhouse is constructed — no edits, no shortcuts.

6mm Twin Wall

A twin wall is a common configuration in greenhouses, but the thickness of the panel varies. Our polycarbonate panels are 6mm thick, which sounds like a small difference than 4mm, but it creates 20% effectiveness in heat protection, 5-10% less light transmission. It will also last longer, especially in the variable climate of New Zealand.

Improved Wind Resistance With Door Lock

The greenhouse is able to withstand strong wind from the outside, however, if wind gets inside through the door, the greenhouse becomes vulnerable and some panels may be lifted off. For this new series of greenhouses,, we have added a door lock to keep the door securely closed.

Extensive Reinforced Bracing

Every panel has extra diagonal bracing behind their back, protecting them in severe weather conditions. There are also horizontal bracings added under the peak, which stabilize the structure of the whole greenhouse.

Stainless Steel Fasteners

Upgraded stainless steel bolts and nuts, they are rust proof as the aluminium profiles. It will support the greenhouse for many years to enjoy with peace of mind.

Optimal Ventilation

A well-ventilated greenhouse maintains stable temperatures and healthy humidity levels, helping prevent overheating, condensation, and disease.

These easy-to-open vents can be operated with one hand, or you can get an automatica vent opener.

Polycarbonate vs Glass Greenhouse

Poly Greenhouse


✔ Excellent Insulation: Polycarbonate panels provide superior heat retention compared to glass, helping maintain stable temperatures and extend your growing season.


✔ Impact-Resistant & Virtually Unbreakable: Designed to withstand hail, strong winds, and accidental knocks.


✔Diffused Light for Healthier Plants: The twin-wall structure gently diffuses sunlight, reducing harsh shadows and preventing plant burn.


✔ Energy Efficient & Cost Effective :Better insulation means reduced heat loss, helping you save on heating costs during colder months.


✔ Easy Installation: Lightweight panels are easier to handle and install, simplifying assembly and reducing setup time.

Glasshouse


✔ Maximum Light Transmission: Tempered glass allows more natural sunlight to reach your plants, promoting stronger growth, healthier leaves, and better yields throughout the seasons.


✔ Safer by Design: If broken, tempered glass shatters into small, blunt pieces, making it a safe choice for families


✔ All-Weather Reliability: Built to handle temperature changes, strong winds, and harsh outdoor conditions, tempered glass keeps your greenhouse dependable.


✔ Premium Look & Feel: Tempered glass gives your greenhouse a professional, high-end appearance that blends beautifully into any garden setting.


✔ Easy to Clean & Maintain: Smooth, non-porous surfaces resist staining and can be cleaned quickly

Portable Pop-Up Garden Leaf Collection Bag Large Foldable Yard Waste Bag  Steelmates

Everything for Planting & Garden Care

From seedling tools and irrigation products to pruning, composting, and plant protection, explore useful garden supplies for every stage of growing.

We Give Back

We support New Zealand conservation by donating to non-profits, and through “Greenhouse Grows, Tree Follows,” we plant one native tree for every greenhouse sold, helping restore habitats and support a healthier climate.

  • 5 stars: 178 (93%)
  • 4 stars: 6 (3%)
  • 3 stars: 6 (3%)
  • 2 stars: 1 (1%)
  • 1 star: 0 (0%)
Some of the reviews shown are from related products the merchant grouped with this one.
A
Anonymous (New Zealand)

Good Service, Super Fast Delivery, Love it

G
Growing Green NZ

We have this greenhouse since December 2020, just over 4 years now. Even though setting it up was a bit hard at times due to missing/wrong parts, but we got there in the end. Steelmates were very helpful replacing the parts.
Nothing but good words for the quality. It has survived many storms & downpours. Everything still works as it should, even the automatic window closers. Panels have not deteriorated. Of course, as it's exposed to full sun, the green on the outside has faded quite a bit, but that is to be expected.
Over the years we have added many things. We built a climate control unit for temperature & humidity control, added lots of shelving, a work bench and we have placed white panels on the inside to block our house plants from getting sunburned.

All in all, we would absolutely recommend this greenhouse. We still love it every day!

K
Kathy Tempelman

This greenhouse is great, I really love it, however seriously look at the instructions. It was 3 days of hell putting this together and it would have gone a lot smoother if the instructions were accurate. It's finally up, but seriously I wouldn't do this again.

K
Karen Jones

Brought in January and have only just started putting it together. We brought a 6x3 m. We started well but ran into problems when you had to put the ends up. Called in the family and needed 8 people to hold it together. My advice have an abundance of patience no matter how many times you look at the diagram you will probably get it wrong. Have loads of drinks ready and make sure neighbours are away as you will swear a lot. Make sure where you slide the bolts in are in the correct place. Don��t be tempted to jump ahead as you will probably have to undo it anyway. We are nearly there and very much looking forward to using it. A great product but much more details needed to put it together.

J
Jane chapman

My husband has put the greenhouse together and we are both very satisfied with it but as putting it together you have to read 2 steps in front as if you do step by step you have to keep undoing what you have done to allow the next one.
Also the instructions need to states left and right top rail for the guttering as easy to put the wrong way up and then you have to undo complete side.
But over all great product and very strong.
The you for your great friendly and fast service

S
Sylvia Cisneros

I was happy with this purchase. It is well built and sturdy greenhouse. But to be honest, the assembly was really a trouble, and I asked my husband for help to put it together. Like I said, this greenhouse is not fun to build but you will be amazed at the finished product. The price is consistent with the greenhouse, regarding the size, quality and materials.

R
Randy. D

This greenhouse is so perfect and our family all like it! This is our second greenhouse, but compared with the first one, it is very wonderful! So we were a bit more diligent after receiving it.Putting it together was also very easy. It took a little time to assemble it. After that, I can make full use of it. All in all, I like it and it does the job I needed it for. It's a pretty good greenhouse.

R
Robin. L

I feel I should thank all the early reviews for their feedback on the feeling of the usage of this greenhouse, which encouraged me to select this one among various similar goods. It can feel like a technical challenge to assemble at first, but taking your time to fully understand the instructions is worthwhile as you get a great greenhouse in the end. Now, my seeds are inside this lovely greenhouse. It seems very partical.

M
Molly

So proud of me to put it only by myself. Though it took me several days to complete, the result satisfied me. The instructions are easy to follow if you can look at a drawing and see what is needed. Originally, I was worried about how well it would hold up the wind, but it greatly exceeded my expectation. To some extent, the ventilation is not enough. Overall it is a fantastic little greenhouse and I highly recommend!

S
Shirley Shimek

I decided to purchase this greenhouse after comparing many similar products in terms of quality, price and beauty. To my satisfaction, the delivery is very rapid and the product is well-packed. Even when I receive it, it is not damaged. A little trouble is that it took me some hours to assemble it. However, it's worth the time and my effort. I am very excited to begin using this greenhouse. Thanks for a great product!

Z
Zechary Puig

What a nice greenhouse! It was the first time that I purchased a greenhouse by online shopping. Once it was delivered, it was perfectly preserved. All parts are in good conditions and no damage. For me, assembling may be a little difficult so I had to spend a little more time on it according to the instructions. Love my greenhouse! It's worth the price and effort!

B
Becky Cooney

Very happy to receive the greenhouse. And the delivery is also very fast, making me pleased. Meanwhile, the qualiy of this greenhouse is so good that it has been beyond my expectation. It is what I wanted and I love the greenhouse!

R
Ralph Homan

I really like this greenhouse. It is so solid that I highly recommend it. Though it took several hours to assemble, very worthwhile. Overall, it's a good price for the quality.

F
Faye Marin

Upon receiving it, I couldn't wait to assemble it. A little complicated for assembly, but once you understand the drawings it goes together quick. Much to my surprise, it's pretty sturdy than my precious one. My family and friends all like it . Highly recommend !

K
Kathy Posey

My dog likes it! It is getting colder now and I would like to keep my dog from cold air. Upon receiving it, I couldn't wait to build for him. Though the process is not smooth, it was finished at last. Very satisfied with the greenhouse and I think my dog will stay warm in it and not hit by blast cold wind. So practical. Both like it!

B
Becky Norris

I purchased it a few weeks ago. Recently, I started to put it together. I hadn't had expectations, however, the buliding is very sturdy. What makes me more satisfied is that the color is beautiful, which is my taste. Nowadays, when my relatives or freinds call on, Iwill recommend them this greenhouse as my most precious thing. I am considering to buy another one now.

a
andrew.j.t

Excellent Retailer! Prompt and helpful communication followed by excellent delivery! Would highly recommend.

l
leadshed

Thank you for the great auction and allowing us time to pay it off. Arrived next day and we are very pleased with our purchase

A
Anonymous (New Zealand)

It has taken 4 people 2 days to erect. The parts were labelled very well. We did have difficulty with the screws at times and it would have helped if they had of been a bit longer. I don’t think it was a particularly easy build but the finished product is lovely.

W
Wayne Hutcheson (New Zealand)

Great easy service and good product.

B
Brian Darragh

Very pleased with our new green house pick up from Christchurch warehouse with out any problems

h
hat13

Good trade cheers Hat

h
hairbag.racing

great trader thanks

T
Tony Stewart

My wife bought this late last year and it took weeks to arrive.
Akthough the parts appear light and flimsy it actually stiffens up as the build progresses.
The so called instructions are among the worst I've seen.
Almost no explanation rather a series of drawings that are not in a logical order.Eg the instruction for the base/ foundation are on the last page. There should be step 1, step 2 step 3.... etc.
The tiny 6mm bolts are fiddly in the extreme. Make sure you brace it against wind if you're not finished in one day.
However I think it will be an OK green house when it's finished.

s
sonoferic

Quick delivery, good design,
But very fiddly little 10 mm bolts, and hundreds of them.
Doors blew off on the first 20 knot breeze.

e
eva11

great trade

t
tmm51

awesome trader quick and efficient great communication A+++ would trade again

b
betski1

Excellent trader!! Immediate contact for pickup and very helpful. Highly recommended will trade again.
cheers