How to insulate a greenhouse

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How to insulate a greenhouse

BBC Gardeners' World Magazine

Published: Thursday, 11 July 2019 at 8:49 am

Find out how to insulate your greenhouse over winter, keeping heat in but letting light through.

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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.

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

Measuring the sides of the greenhouse

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

Step 2

Adding bubble wrap to the greenhouse

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

Fixing the bubble wrap to the ridge of the greenhouse

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

Step 4

Fixing bubble-wrap to the greenhouse vents

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

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