shed-insulation

What is The Best Shed Insulation to Retain Heat? (2021 Review)

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In this guide we’ll take a look at the best shed insulation for the money.
I’ve compared warmth retention, build quality, longevity and cost
to give you my top recommendations.

What is the Best Insulation For My Shed?

In a rush? Here's my top choice...

Yuzet Shed Insulation 1.2m x 25m

Fuss-free, economically-priced insulation solution!

This Yuzet Shed Insulation reflects 95% of radiant heat back into the building. It's perfect for summer houses, sheds, garages, and even caravans, keeping them warm in the winter and cool in the summer. It's easy to install, and consists of a layer of corrosion-resistant foil, backed by a multi-layer air bubble film, with a total thickness of 4 mm.

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Everything I Recommend

IMAGE RECOMMENDED PRODUCTSPRODUCT FEATURES
  • Best shed insulation for UK market
  • Effective and lightweight
  • Good value solution for insulation
  • Easy to install
  • Excellent value for money
  • Covers 75m²
  • Easy to install
  • Effective insulation
  • 40% recycled material

More Detailed Shed Insulation Reviews

Yuzet Shed Insulation 1.2m x 25m

FEATURES RATING PRICE
FEATURES
  • Best shed insulation for UK market
  • Effective and lightweight
  • Good value solution for insulation
OUR RATING
97
PRICE
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Yuzet Shed Insulation 1.2m x 25m Review

This Yuzet Shed Insulation reflects 95% of radiant heat back into the building – it’s extremely effective for use in sheds, summerhouses and even caravans.

It has a layer of corrosion-resistant foil, backed by a multi-layer air bubble film, and has a total thickness of 4 mm.

If you’re looking for something which is going to effectively curb heat loss – this is some of the best shed insulation for the job.

It’s available in a range of sizes; I bought the 1.2 x 25 m roll, which provided a total of 30 m². This was plenty to insulate my small summer house and gave me some left over that I can use on other projects.

The shed insulation was easy to install using a staple gun. I allowed 0.5 cm overlap between sheets and taped over the joints with aluminium foil insulation tape. The whole job was completed in an afternoon.

The result of using this insulation was very effective. The summer house is much warmer than before, and the difference when heated up with a fan heater is incredible – it holds the heat so much better.

If you use this insulation you’re sure to notice a marked difference between before and after – it’s really worked a treat!

The shed insulation should also keep the summer house cooler in summer which will be great.

This is a really simple solution for improving insulation, allowing all manner of outbuildings and caravans to be usable all year round.

Pros

  • Very easy to cut to size
  • Users notice a marked difference using this insulation in the winter months - sheds are noticeably warmer
  • Can be fixed to the walls easily using a staple gun
  • Thicker than others on the market at 4mm - better quality and provides better insulation

Cons

  • Bulky and difficult to manoeuvre in cramped spaces such as small sheds

Strotex Thermal Shed Insulation 1.5m x 50m

FEATURES RATING PRICE
FEATURES
  • Easy to install
  • Excellent value for money
  • Covers 75m²
OUR RATING
96
PRICE
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Strotex Thermal Shed Insulation 1.5m x 50m Review

This Strotex Thermal Shed Insulation is a great value insulation solution for sheds, garages, outbuildings and camper vans.

It covers a total area of 75 m² and is lightweight and easy to work with.

This insulation is made up of three layers: the upper and lower layers are made of aluminium polyethylene film and the inner layer is reinforced to make it stronger.

It comes as a 50 m roll which provides enough to insulate a large outbuilding – and I used it on a shed and still had some to spare. It took about a day to complete the insulation.

The results have proved effective, so if you’re looking for something that will allow you to spend more time in your shed in winter, or keep cool during summer, this is an excellent-value option.

Pros

  • Lightweight which makes it easy to handle and install
  • 50m roll is enough to insulate larger sheds and outbuildings
  • Effective at reducing the temperature of the shed on very hot days, and warming it in the winter

Cons

  • Harder to cut than others on the market due to the strength

SuperFOIL Shed Insulation Foil 750mm x 50m

FEATURES RATING PRICE
FEATURES
  • Easy to install
  • Effective insulation
  • 40% recycled material
OUR RATING
94
PRICE
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SuperFOIL Shed Insulation Foil 750mm x 50m Review

This SuperFOIL Shed Insulation Foil is 7.5 cm wide and comes in a 50 m length.

It’s easy to cut to size and install, offering a good amount of insulation without being too unwieldly to manage!

This insulation is 3mm thick in total, with a foil barrier on the outside and air bubble layer on the inside.

You’ll find the insulation will greatly improve the temperature in whichever building you use it in, be it a shed, garage, temporary structure or caravan.

It effectively keeps interiors and dry in the in the winter months and cool in summer.

This is a particularly eco-friendly choice as the shed insulation is made from 40% recycled material. This makes it the best shed insulation for the environmentally conscious.

Pros

  • Easy to cut to size
  • Can be stapled to the wall as it’s strong and doesn’t tear
  • 50m roll is enough to insulate larger sheds and outbuildings

Cons

  • Not quite as effective as other insulators so multiple layers may be required
  • Some users have found it gathers condensation

Things to Know Before Buying Shed Insulation

With property at such a premium in the UK, many of us are turning to outdoor buildings to provide us with a bit of extra space.

Of course, the British weather doesn’t make this easy; our sheds and summer houses are often roasting hot in summer and absolutely freezing in winter.

However, there is a solution! To really get the most out of your shed, summer house, outbuildings, or even caravan, you can choose to insulate them.

This is simple to do and will allow you to create an extra room that is usable all year round.

The following information will help you make an informed decision and choose the best shed insulation for your job:

The idea of creating more useable space might seem appealing, but is it really worth going to the effort of installing insulation? These are just some of the ways that making good use of shed insulation will benefit you:

  • First and foremost, using this type of shed insulation will reduce heat loss. This, in itself, will make outbuildings a more comfortable temperature all year round. When used in conjunction with a heater, insulation can help turn an outbuilding into a usable room in the winter. Just imagine being able to sit cosily in your summer house in December!
  • If you love gardening, and aim to be outside as much as possible, you will undoubtedly appreciate having a shed which you can retreat to and warm up in. Insulation will make that difference in temperature noticeable.
  • You can use insulation in buildings like sheds and greenhouses to protect plants in freezing conditions. It creates a warmer environment for them as well as you!
  • Even if you do not want to spend time in your shed in winter, your tools and garden furniture will appreciate being kept in a warm, dry environment over the coldest months. It’s worth insulating your shed to protect any items you store. Freezing temperatures can cause metal and plastic to become brittle. Power tools also struggle with extreme changes in temperature, if you hope to use them over winter, it’s best not to let them get too cold.

Shed insulation combines two different technologies to keep rooms at a more consistent temperature – cooler in summer and warmer in winter.

Trapped air in the middle bubble layer provides insulation. The air, trapped in plastic bubbles, does not change temperature quickly. It will retain heat in the winter, and maintain the shaded temperature of the shed in summer.

The outer foil layer reflects heat radiation back into the room. Heat radiation is emitted by heaters, amongst other things, and a foil surface will reflect and contain this heat in the room. This is much more effective than say, a matt black surface, which would absorb the heat.

Furthermore, as a metal, foil conducts heat well. This means that any heat which is kept in winter by the bubble layer will be easily transferred to the foil layer and into the room.

Here we’re going to look at the two most popular types of shed insulation, foil and fibreglass, and compare the pros and cons of each.

Fibreglass Insulation

Fibreglass insulation consists of ‘wool’ made from glass fibres. Its main function, in terms of insulation, is to block convective and conductive heat.

This means it blocks cold air from physically entering the space, through cracks in the walls, and also does not conduct the warm temperature of the inside space to the exterior of the building. Fibreglass is not a good conductor so it stops heat transferring.

Pros

  • Fibreglass is cheap to buy.
  • It’s easy to install – coming in rolls.
  • Great blocker of convective and conductive heat.

Cons

  • Aesthetically messier than foil insulation – needs to be concealed.
  • Inhalation of fibreglass particles is believed to be hazardous to health – you need to wear sufficient protective clothing when installing it, and ensure that it is well concealed.
  • Needs to be well protected from moisture or else can grow mould.

Foil Insulation

Foil insulation reflects radiant heat. This means that it will reflect heat back into the building, instead of allowing it to escape, and will also deflect heat from the sun in summer.

It also works, to a certain extent, to physically block gaps in the shell of the outbuilding and stop drafts.

Pros

  • Extremely easy to install with limited fuss or specialised equipment needed – only a staple gun is required!
  • Prevents loss of radiant heat.
  • Durable and strong – staples can be removed and insulation sheets easily repurposed.
  • Non hazardous.

Cons

  • More expensive than fibreglass.
  • Not as effective against heat loss from convection.
  • Other insulation may be required to improve make effective against all types of heat loss.

You can install insulation either vertically or horizontally on walls.

When putting insulation in vertically, start at the top and roll it down. Allow the insulation to overlap slightly onto the floor and ceiling to ensure a well-insulated finish. You should also overlap each strip by approximately 5 cm for the same reason.

This advice is presuming that your outbuilding is a little draughty – if it’s very air tight you should leave approximately 5 cm gap between the top of the insulation and the ceiling to allow air in and moisture to escape.

If installing insulation horizontally, start from the ground and go up. You should still overlap onto the ground and ceiling, and overlap the sheets.

Add insulation to the ceiling as well.

The insulation can be easily cut to size and fixed with a staple gun. Remember to apply a decent amount of tension when stapling and to staple at 5 to 10 cm intervals.

Once it is fixed, you can trim any excess. As a final step, you should seal the joins with aluminium foil insulation tape.

Shed Insulation FAQs

Yes, some ventilation between the insulation is required. Often, sheds are quite draughty, so the problem is usually sealing them rather than improving ventilation.

However, if your outbuilding is well sealed, you should provide ventilation to allow fresh air in and moisture to escape. Seeing as warm air rises, providing a 5 cm gap between the ceiling and the insulation will suffice. This will avoid moisture build-up and prevent ceiling timbers from rotting.

  • A draughty door frame might be causing the problem. This can be improved by using some insulating strips. These are tacked to the inside of the frame and form a seal when the door is shut.
  • Foam filler can be used to seal any gaps around window frames or elsewhere in your summer house.
  • To reduce heat loss through windows you can apply a special secondary glazing film directly to the windows. Even more effective are secondary glazing kits which are acrylic or polycarbonate panels that are held in place with fixing strips or magnetic tape.
  • For a quick fix to insulate the floor you could put down a breathable membrane and cover this with an offcut of carpet. You can also insulate your shed floor by installing a thin layer of insulation board and covering it with OSB (oriented strand board) to protect it.

Yes, insulation will help stop damp forming. Damp often comes into sheds via condensation forming on surfaces in the shed.

When the temperature drops, it reaches the ‘dew point’ which is the temperature at which air condenses and condensation forms.

Installing insulation will help the temperature inside the shed be more consistent, which will decrease the likelihood of the temperature dropping to the dew point. This is how insulation can help stop damp forming.

Sources
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