Do I need a Vitavia Base Plinth?

Yes, you'll definitely need some kind of base for your greenhouse. Here's why: The front door end of the frame sits a bit lower than the rest of the greenhouse. This means it needs to hang over something sturdy, like timber battens or a Vitavia Steel Perimeter base.

Why choose a Vitavia Steel Perimeter base?

It's a great option because it: Helps make sure your greenhouse is nice and square Keeps everything level before you start adding the glass Think of it as giving your greenhouse a solid foundation to stand on. It's like making sure your house has good footings – it just makes everything more stable and secure. Remember, a well-set base means a happier, longer-lasting greenhouse!

How do I prepare the base for my greenhouse?

For best results, build your greenhouse on a perfectly square and level slab or concrete base, or use anchor spikes if you have a Vitavia Base. You'll find the exact measurements and instructions for using the spikes in Section '0' of your assembly guide.

How is the Greenhouse Packaged?

Your greenhouse frame and base will arrive in long, thin boxes made of sturdy cardboard. The glass packaging depends on what you've ordered: boxed for horticultural glass, or as individual sheets for full pane toughened glass.

Where do I find the assembly instructions?

The assembly instructions will be in the main greenhouse box, and it will clearly state “assembly instructions in this box”. You can email us at sales@greenhousestores.co.uk and we can email them to you also.

How long does it take to build?

Building your greenhouse is typically a weekend project: set aside Saturday for the framework and Sunday for glazing. Remember, it's crucial not to leave the greenhouse partially glazed, and the time may vary depending on the size of your greenhouse.

Where should I start with my greenhouse assembly?

Begin by thoroughly reading the assembly instructions, then prepare the ground, assemble the base frame, build the greenhouse frame, and finish with glazing - in that order. Follow the instructions step-by-step, including the summary at the front of the manual, to ensure a smooth assembly process.

What if I'm missing parts or something is damaged?

If you discover any missing or damaged parts, don't worry - we're here to help! Simply email us at support@greenhousestores.co.uk with your order number, and we'll get in touch with you as soon as possible to resolve the issue.

Do you provide installation services?

If you're interested in this service, just add the Installation option above. One of our Professional Greenhouse Installers will install your new greenhouse for you. All we need is a properly prepared flat slab or concrete base to fit your greenhouse onto.

Call : 0800 098 8877

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Use code SPRING20 at checkout min order £599 (Greenhouses)

Vitavia Sirius Greenhouse
Vitavia Sirius Black Orangery Greenhouse - Toughened Glass

Vitavia Sirius Black Orangery Greenhouse

Name: Vitavia Sirius Black Orangery Greenhouse - Toughened Glass
Brand: Vitavia
SKU: 12116
Price: 2350.00 GBP
Availability: InStock

FREE Delivery 4-6 Weeks ⛟

SAVE £305

Click to enlarge - For illustration purposes.

Black Vitavia Sirius Orangery Greenhouse

Vitavia Sirius Black Orangery Greenhouse

Vitavia Sirius Orangery Greenhouse Black

Vitavia Sirius Orangery Greenhouse with Toughened Glazing Black Coating

Vitavia Sirius T Shaped Orangery Greenhouse Toughened Glazing

Vitavia Sirius Black Orangery Greenhouse with Glazing Bar Capping

Vitavia Sirius Black T Shaped Greenhouse

Vitavia Sirius Black T Shaped Orangery Greenhouse

Vitavia Sirius Black T Shaped Orangery Greenhouse Interior

Vitavia Sirius Black Powder Coated T Shaped Greenhouse

Vitavia Sirius Black Orangery Greenhouse With Toughened Glazing

Vitavia Sirius Black Orangery Greenhouse with Toughened Glazing and Double Doors

Quick Code: P11807

SAVE £20 EXTRA

Use code SPRING20 at checkout

12ft 7" wide x 8ft 5" deep
Black Powder Coated Frame
3mm Toughened Glass
Bar Capping Glazing System.
4 x Roof Vents
Double Sliding Doors
12 Year Warranty
Easy to install

Greenhouse Dimensions

A: Greenhouse depth

2570mm (8′ 5″)

B: Greenhouse width

3840mm (12′ 7″)

C: Eaves height

1590mm (5′ 2″)

D: Ridge height

2520mm (8′ 3″)

E & F: Door Size

1220mm (4′) x 1910mm (6′ 3″) (aperture)

G:

2520mm (8′ 3″)

H:

1244mm (4′)

Growing Area:

13m²

Minimum Base Size:

2570mm (8′ 5″) x 3840mm (12′ 7″)

Customise your Greenhouse

Get it installed by Professionals:

Installation requires that you purchase the Base Plinth Option if one is available. You MUST have a surface of slabs, concrete or decking. NOT soil or gravel.

No Installation
£0

Installation
£770

Add Cresting?

Vitavia Black Cresting

+ £159

Add Ventilation?

Auto Roof Vent Opener

+ £38

This automatic opener for your roof vents will automatically open your roof vents to ventilate your greenhouse when it becomes too hot.

Qty 1

Curtain Shading

+ £27

Curtain shading will protect your plants from sun scorch and provide shade to moderate temperature. 6ft x 8ft.

Qty 1

£10 off

Louvre Window Black

+ £49

A louvre window brings fresh cool air into your greenhouse to moderate the temperature inside. An essential add on.

Auto Louvre Opener

+ £48

This automatic opener mechanism will open your louvre window for you when you’re not around. No need to worry about ventilation, this does it automatically for you! (Does not include louvre window).

Add Staging?

£15 off

1 Tier Staging Black

+ £74

This 1 Tier Vitavia black greenhouse staging gives you a handy work surface and storage area. Dimensions: 76cm (H) x 50cm (D) x 120cm (W) Please note photo shows Top tier extension as well!

Qty 1

£23 off

2 Tier Staging Black

+ £96

This 2 Tier Vitavia black greenhouse staging gives you a handy work surface with additional low level storage. Dimensions: 76cm (H) x 50cm (D) x 120cm (W)

Qty 1

£10 off

Black Shelf

+ £49

Black aluminium shelf that fixes to side of greenhouse. 122cm x 15cm

Qty 1

Top Tier Staging Extension Black

+ £45

This little top level black shelf attaches to 1 or 2 Tier staging to give you a bit more storage space

Qty 1

Add Extras?

Max/Min Thermometer

+ £23

This thermometer will tell you your maximum daytime temperature as well as record the lowest night time temperature in your greenhouse.

100L Mini Rainsaver Water Butt

+ £54

Add this 100L water butt kit that includes: Butt, Tap & Lid - Black Stand

Qty 1

Screwhooks

+ £7

These handy screwhooks screw into the roof bars of your greenhouse for to attach wire or string to for growing vine plants like tomatoes. 10 screwhooks per pack.

Qty 1

Water Butt Connecting Kit

+ £15

Hose and connector fittings to connect your Vitavia Downpipe to your Vitavia Water Butt.

Qty 1

12 Year Warranty
Free UK Delivery
Expert Installation Available

Was £2655.00

£2,350

Spring Sale - £305 OFF

🚚

FREE* delivery Within 4-6 Weeks

* Some areas may incur a delivery charge.

Limited Spring Stock

£2,350

FREE Delivery 4-6 Weeks ⛟

Need Help Choosing?

📞 0800 098 8877

CALL US FOR A GREAT DEAL

The Vitavia Sirius Orangery Greenhouse is beautifully designed to give you an attractive greenhouse with loads of space for growing or just relaxing, or both !

The Vitavia Sirius Greenhouse in powder coated black is a superb model that will produce great results year after year and with it`s anodized frame it will stay looking shiny and new throughout it`s life !

This Sirius has a 4 opening roof vents for ventilation, a smooth sliding double door and integral gutters.

3840mm (12ft 7") Wide Aluminium Greenhouse - Spacious and Practical.
3mm Toughened Safety Glass - Full length toughened glazing.
Powder Coated Black Aluminum Frame - Looks great and no rust.
Galvanised Steel Base Included - Gives Rigidity and Strength.
Base Corner Posts - You can place this greenhouse on any surface!
Bar Capping Glazing System - Holds glass in place without fiddly clips.
4 Opening Roof Vents - For Ventilation.
Integral Gutters - For Rain Water Collection
3 Rain Water Downpipes included - To fill your Water Butts
Extra Bracing - for strength in roof and corners.
12 Year Warranty - on frame and base.

Delivery is currently Within 4-6 Weeks to UK Mainland for Greenhouses, 3-5 Working days for Accessories only.

Optional Installation: If selected, Installation will be carried out 1-8 weeks after the delivery of your Greenhouse. The Installation Team will contact you directly to book in your installation.Our installation service requires a level concrete, slabbed, or decked area to the minimum size stated on the website. Failure to provide a suitable base area may result in you being charged for the failed installation. If you require staging or shelving assembly, you can arrange it directly with the installation team.

Optional Greenhouse Base with Corner Posts

Place on hard or soft ground! Our Vitavia Black steel bases come with corner posts for installation on soft ground. These 18-inch posts can be sunk into soil and concreted in place for stability. For hard surfaces like slabs or concrete, simply omit the posts.

Toughened Safety Glass

Our toughened safety glass offers superior clarity and durability. It's designed to break into small, less harmful pieces, providing enhanced safety for your greenhouse environment.

Black Powder Coated Frame

The Black powder coated frame and optional base look great and protect the aluminium from weathering. Powder coating is a process where powdered paint is applied using an electrostatic charge to transfer the powder to the aluminium.

Vitavia Greenhouses

Vitavia Greenhouses are known for their high-quality construction, featuring corrosion-resistant aluminium frames and a range of glazing options. Designed for both novice and experienced gardeners, they offer durability, style, and excellent growing conditions.

12 Year Warranty

Vitavia greenhouses come with a 12-year warranty on the greenhouse frame. This warranty covers any manufacturing defects in materials or workmanship. However, it does not cover glass, polycarbonate or Wind Damage. The warranty is only valid if the greenhouse is assembled according to the provided instructions

Frequently Asked Questions

Do I need a Vitavia Base Plinth?
Yes, you'll definitely need some kind of base for your greenhouse. Here's why:
1. The front door end of the frame sits a bit lower than the rest of the greenhouse.
2. This means it needs to hang over something sturdy, like timber battens or a Vitavia Steel Perimeter base.
Why choose a Vitavia Steel Perimeter base?
It's a great option because it:
- Helps make sure your greenhouse is nice and square
- Keeps everything level before you start adding the glass
Think of it as giving your greenhouse a solid foundation to stand on. It's like making sure your house has good footings – it just makes everything more stable and secure. Remember, a well-set base means a happier, longer-lasting greenhouse!
How do I prepare the base for my greenhouse?
How is the Greenhouse Packaged?
Where do I find the assembly instructions?
How long does it take to build?
Where should I start with my greenhouse assembly?
What if I'm missing parts or something is damaged?
Do you provide installation services?

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Greenhouse Buyers Guide 2025

This comprehensive 2025 guide helps you choose the perfect greenhouse by exploring crucial factors from size and materials to optimal location and essential accessories.

Make an informed decision by understanding how to assess your needs, compare material pros and cons, and ensure proper ventilation and positioning for a thriving greenhouse.

How to Prepare the Ground for a Greenhouse Base

A solid base is the backbone of any greenhouse. You might think skipping this step saves time, but trust me—I've seen plenty of greenhouses fail because of poor foundations. A dodgy base causes more headaches than you'd believe.

What happens with a bad base? Glass cracks. Doors jam. The structure twists. Water pools where it shouldn't. And fixing these problems costs way more than doing it right first time.

Placing your greenhouse in the right spot makes all the difference between thriving plants and disappointing results. As a greenhouse specialist who's spent 15 years helping UK gardeners optimise their growing spaces, I've seen first-hand how position affects everything from temperature regulation to plant health.

Let me share what actually works in our unique British climate. The greenhouse position might seem like a minor detail, but it's one of those things that can make or break your growing success. I made this mistake myself when I first started - my poorly positioned greenhouse meant I was fighting an uphill battle with inadequate light and temperature fluctuations.

Vitavia Sirius Black Orangery Greenhouse

SAVE £20 EXTRA