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A greenhouse needs a base for support, security, and stability. The plastic shed base is not affected by damp, which can be a common issue in humid greenhouses and it prevents warping of the frame, protecting against damage to the glass or Perspex that make up the sides and roof of the structure. As a final point, a solid base acts as a brilliant anchoring point, 

A greenhouse base essentially works in exactly the same way as a shed base and should, therefore, be treated no different. The ground must be completely flat before laying and it’s a good idea to lay a protective weed membrane underneath the base to prevent the growth of weeds into your greenhouse.

There are loads of different base options out there, but if you’re looking to lay a base in a day without a professional team and while sticking to a budget, there’s really only one option for you, and it’s considered one of the best in the industry.

Plastic bases are a modern phenomenon which means a lot of people are still unaware of their existence and their fantastic qualities. So in the below, I am discussing the advantages of them.

Environmentally Friendly

Each base panel is made from 100% recycled plastic that was otherwise destined for more than 450 years in a landfill. Instead, the plastic is recycled and turned into one of the strongest and most affordable base types on the market. 


A plastic base is exceptionally strong, able to withstand weights of up to 420 tonnes per square meter. Their strength is partly thanks to their material, but also due to the cellular structure of each of the panels which enable the base to carry more weight than would otherwise be possible. 

Easy & Quick to Lay

The design of these panels isn’t just great for weight capabilities; it’s also ensured that plastic base panels are easy to fix and lay. Each side of the panel features an interlocking connector that can easily be slotted onto the next panel. Most people can expect to lay as much as 100m2 in just one hour and once the base is on the ground, it's practically ready for your greenhouse to be placed on top.


The fact that the panels are made from recycled plastic means they’re really lightweight which sets them apart from many of the other base options. Concrete slabs and wooden bases are renowned for being pretty heavy and difficult to maneuver, plastic bases, on the other hand, are the complete opposite – they’re so easy to move around you could get the kids involved. 

Cost Effective

Other base forms are generally rather expensive, either for the materials or for a professional team to come and install the base – or both. These plastic panels can be bought from the internet and cost very little. What’s more, they’re delivered directly to your door which means there’s no need to haul everything in and out of your car before you can even begin. 

Low Maintenance

Plastic bases are extremely low maintenance because they’re resistant to adverse weather conditions, UV damage and chemical damage.

Laying a Base in a Day

When you order your plastic base panels online you’ll be given a delivery date. Until that date (this should only be a few days from your order date, or a later date if you choose) sit back and relax. 

Ground Clearance

On the day your plastic panels are due to arrive, start by clearing the area where your greenhouse will sit. This includes removing any grass, shrubbery, leaves, stones, rocks and other debris and being mindful to avoid areas likely to have tree roots under the surface. If you place your greenhouse on top of tree roots, it’s likely that roots could cause issues in future. Although a plastic base can’t be cracked by strong roots, unlike concrete or wood, it could be unlevelled which could cause your greenhouse to become unstable.

Once the ground has been cleared, mark out the area where your greenhouse will sit and insert a wooden stake into each corner.

Digging Down

This might seem like an unnecessary step, but it’s actually essential for the security of your greenhouse.
Dig down around half a spade’s depth, or until all topsoil has been removed. Topsoil is usually dark brown so dig down until a lighter soil can be seen across the entire area. 

Level the Ground

Once the ground has been cleared and dug, it’s time to level the subsoil. This sounds technical but can be done using just a plank of wood to identify peaks and troughs, alternatively, use a spirit level. Once the ground has been leveled it’s time to re-add the topsoil ensuring the surface remains level at all times. As soon as the topsoil has been re-laid, rake the surface until it is smooth, flat and free of any lumps.

Now this has been done you can use a vibrating plate, a garden roller or ground tamper to compress the soil. Continue to go over the area until the soil can no longer be compressed.
Once this is complete, use a spirit level once again to check everything’s level. 

Laying the Base

We’d always recommend laying a weed protection sheet on the ground before laying the base (this can be ordered at the same time as your plastic panels).

As soon as your order arrives, roll the weed blocking membrane over the area and cut to size. Once it’s been cut, secure in place with fabric pegs.

Now it’s time to get started on the base. Simply pick up a couple of panels and fix them together using the connectors on each side. Once all of the panels are connected and in place, it’s a good idea to pin the base for added security. 


We always recommend filling a plastic base with loose gravel or even soil, as this will add even more strength and stability. However, this is by no means compulsory and leaving the base empty will allow a continual circulation of air beneath the greenhouse.
Now you’re ready to build your greenhouse and there you have it, building a greenhouse base in a day has never been simpler. 

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