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How to insulate a garden shed

As the nights start to draw in and the evenings get cooler, the wooden garden shed becomes less of an appealing place to be, but it doesn't have to be this way. Our guide takes you through how to insulate a garden shed going through the two most popular and efficient insulation options available.

  • Cheapest shed insulation: Bubble Wrap
  • Most Effective: Fibreglass wool

Before you start

Treat the outside of your garden shed with a good quality timber treatment. You can check out our more in depth wooden shed treatment guide here.

Make sure that your shed is on a flat, solid and level base to avoid damage and excess moisture. You can see a guide on the perfect base for a garden shed here.

Cheapest way to insulate a garden shed: Bubble Wrap

Bubble wrap is a great form of cheap and effective way of insulating a garden shed. The average garden shed isn't equipped with any form of insulation and can be quite draughty, especially if you're in an overlap building. A cheap way of insulating your garden shed is with a good amount of bubble wrap!

Large rolls can be bought from most DIY or even stationary stores as well as online. The wrap helps to trap air, in addition to the bubbles themselves helping to insulate the inside of your shed.

Bubble wrap is great for both tongue & groove and overlap buildings of any size or shape.

Bubble wrap sheets are simple to install with a staple gun or thumb tacks and can be used on the roof as well of the walls to prevent draughts and keep your shed feeling snug!

What you need to insulate insulate a garden shed using bubble wrap: bubble wrap, staple gun and heavy duty staples 


Most effective insulation for a garden shed: Fibreglass wool insulation

If bubble wrap doesn't appeal to you, or you fancy kitting out your shed with something a little more effective in the winter months, then traditional fibreglass wall insulation is another option. 

Fibre glass wool offers similar insulation to what you'd find in your home and can be found in DIY stores and online.


First of all check inside of your garden shed and make sure you haven't got any damp areas or gaps where water could get inside. If you do, don't panic, check out our damp proofing guide here!

The best thing to ensure your insulation stays as dry as possible is to first fit a breathable membrane in front of the shed cladding.

You'll need to place some additional batons within the framing and tack the membrane to these.

This is to stop the membrane actually touching the walls of your shed and creates an air pocket; you want any moisture entering the shed to evaporate.

Next up is the insulation itself. Fiber Glass Wool can now be laid over the top of the membrane, between the shed framing.

Avoid compressing the fiberglass as this will make it a less effective insulator. You can then cover over all of this with MDF, plywood or OSB and tack the boards into place at the framing points to retain the fiber glass wool.

Don't be tempted to use plasterboard, this might be great for indoors but leaning a heavy bike against it is going to leave a nice big dent! Fiberglass wool insulation is great for the roof of your garden shed too where most heat loss tends to occur. Follow the exact same steps that you did for the walls for a cosier shed in no time.

What you'll need to install fiberglass wool insulation


Does it matter what type of shed I have?

Of course, the shed you buy in the first place greatly impacts the effectiveness of these insulation techniques. While Overlap is perfectly suitable, a tongue and groove building will put you at an advantage as the cladding interlocks, preventing the vast majority of draughts and helping to prevent damp.

If you haven't yet decided on a shed or are thinking about an upgrade, why not take a look at our tongue and groove shed range via the link below for some inspiration!

If you want to save some time with your insulation, why not take a look at our pre-made kits, suitable for use on roofs, walls and floors here. 


Take a peak at these dedicated pages!

waltons-summerhouse-range waltons-log-cabin-range 

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