How to insulate a greenhouse

Discover more ways to keep the heat in your greenhouse over winter.

Insulated with bubble wrap, your greenhouse will have fewer draughts and will also benefit from lower bills if you use a heater during very cold weather.

You can use your greenhouse in many different ways in winter - discover seven winter projects for your greenhouse.

You can buy insulating bubble wrap by the metre from garden centres. Choose polythene that is specifically designed for greenhouses, as it is UV-stabilised and should last for at least three years. Here's how to attach it.

Insulating your greenhouse with a layer of bubble polythene in winter will give your plants a helping hand through the colder months, keeping in heat but letting light through.

You Will Need

• Measuring tape
• Bubble polythene
• Scissors
• Nails, drawing pins or wire, to fix the polythene in place

Step 1

Before buying any bubble wrap, measure the sides, roof and ends of the greenhouse.

Step 2

Starting with the sides, fix the bubble wrap to the frame using nails, drawing pins or wire, keeping it tight for extra insulation.

Step 3

When insulating the roof, fix the bubble wrap to the ridge and spread it down the glazing bars.

Step 4

Cut and fasten the bubble wrap around windows, vents and louvres so they can be opened.