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Plywood and Polystyrene (Foam Boards and Pallet Boards)

If there’s one word you want to bear in mind when insulating a shed, it’s Celotex. This type of insulation board comes in either polystyrene or plywood with foil-backs.

You can wooden shed‘s wall and an MDF or plywood panel to create a false wall in the interior.

Bubble wrap, because it contains gaseous air pockets, means that atoms have more space. Because of this, they (and heat), move more slowly.

This method of insulating your shed will run you approximately £17 for a 0.6m wide, 8.4m long, by 3mm thick roll.

This is one of the cheapest and most cost-effective ways to insulate a wooden shed. Simply:

Top Tip: Attach the bubble wrap to the frame (wall studs) of the shed and not the actual panel.

Ground

We said just now that your flooring can leech up to 40% of your shed’s heat. To combat this, think about installing Celotex panels between your floor joists before you add flooring.
Also, depending on the floor surface that your shed is built on, you may want to use a breathable membrane. Use a builder’s plastic sheet to prevent moisture and even weeds coming up through your flooring. Then, you can think about floor insulation.

When it comes to insulating shed floors that are already in place, there are two main ways to ensure that heat gets retained inside your plastic garden storage.

  • Line the floor with a breathable membrane.
  • Lay a rug or another piece of cloth (like a section of carpet) on top.

Top Tip: If you don’t add a breathable membrane, make sure you regularly check under the rug to see that no damp or rot is building up.

Draughts – Draught Exclusion

Using a draught excluder either where your shed meets, say, a concrete base or beneath your door can also be a cheap way to keep your shed insulated.

Roof

To properly insulate your shed, you want your roof to not only reduce heat loss but also be water-resistant. This is where installing roof felt, like that included as standard with our BillyOh garden sheds comes in handy.

Not only will roof felt help to prevent damp and rot in your roof, but it’ll also allow for adequate water runoff. To better insulate your roof, you could install insulation batts or Celotex boards between your roof joists. For metal sheds seal any gaps with silicone caulk.

Does my shed need a vapour barrier Garden Buildings Direct infographic with three tiles for different sheds and climates with icons and arrows regarding air flow, insulation, and vapour barriers
Use this infographic to decide if your wooden shed needs a vapour barrier.
And if you want more information about preventing damp in a shed check out this great guide we wrote.

Temperature

Ultimately, insulating your shed is about combatting heat loss. And extreme temperatures (cold or hot) can both be regulated by a well-insulated shed. That means that your insulated garden building will stay warmer in winter and cooler in summer.

Wooden Sheds vs Metal Sheds

Now, it should be mentioned that, although a lot of the methods mentioned can be used for both, they’ve been put forward with wooden sheds in mind.

For example, insulation batts won’t really work in a metal shed where you can’t cover them with MDF or OSB boards. So if you want to learn more about combating condensation in metal sheds, check out this guide.

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FAQs

One of the cheapest forms of shed insulation is bubble wrap. Air pockets will trap and slow down the transfer of heat. You can also buy foil-backed insulation bubble wrap for garden buildings. Otherwise, use a draught excluder and rugs and keep doors and windows shut when not in use.

Yes, insulation can be installed in your shed at all points of its thermal envelope (flooring, walls, and roofing). Insulation methods range from caulking and expanding foam in gaps and around window frames to using insulation batts and boards.

To insulate a small wooden shed we suggest weighing up how important it is to do so and what your budget is. Make sure to seal and gaps in the roof and walls and if need be, consider installing some insulation batts for a cheap solution.

If you want the most comprehensive insulation installed whilst building your shed, we encourage the use of Celotex insulation boards. Although slightly more expensive than insulation batts, they are less prone to water damage and longer-lasting.

 

Use an energy-efficient radiator or tubular heater on a low, constant setting.

Yes, insulating a shed will slow down the transfer of heat exchange. That means it'll stay warmer in winter and cooler in summer, especially if you close its thermal envelope and use a fan or air conditioning.

 

See the infographic below to determine whether your shed needs a vapour barrier between the roof or walls. A breathable membrane underneath any garden building's flooring is always a good idea.

 

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