Your Guide to Better Shed Insulation

Why Insulate Your Shed?

Shed insulation is essential if you’re going to make the most of your garden shed. The temperature inside can get pretty cold during the winter months so, if you want a pleasant working environment the whole year round, you’re going to need a well-insulated shed.

In order to achieve this, you have two options: insulate your existing shed or buy a new one that offers better levels of insulation.

Insulating an Existing Shed

a wooden shed with tools hanging on the wall


Inspect Your Shed

Firstly, clear out the shed completely. You don’t want your work impeded by tools, garden furniture and bikes.

Ensure that there are no loose panels, no missing fixings and that everything is secure, well-maintained and watertight.

Next, check the condition of the roof felt. If any of the corners are loose then nail them to the roof. If its overall condition is poor then you’ll need to consider replacing it with a new weatherproof covering.

Once you’re satisfied that everything is ship-shape, it’s time for some proper shed insulation.

Insulate Doors and Windows

Pay careful attention to the areas around the doors and window frames. This is where a lot of your shed’s heat is lost.

Fill any cracks or holes, caused by general wear and tear, with liquid wood or expanding foam. Then use draught excluders, or even homemade rubber strips, around the doors and window frames to plug further gaps.

a man in a protective mask, insulating a shed's walls


Insulating the Walls and Roof

Firstly, fit a damp-proof membrane on your shed’s inner cladding.

Then it’s time to select an insulation material to place between your shed’s structural frames.

Polythene and Bubble Wrap

The cheapest and easiest option is to use polythene or bubble wrap. However, bear in mind that it is also the least effective.

PIR Insulation Boards

Fitting PIR insulation boards is a costlier, but far better option. This is a method commonly used in the building trade, so you won’t have any problems finding boards to fit between your shed’s frame. Cut them to size, if necessary, and then simply push them into place.


Packing rockwool between your shed’s frames is another highly-effective method of insulation. Ensure that you wear protective glasses, a facemask and gloves, when cutting it, to avoid irritation to your eyes and skin.

If this puts you off, why not use a different type of wool?  Consider Thermafleece, which is purpose-made for this type of job.

Finally, it’s time to board up the insulated layer. Plywood is the most effective material to use, as it is tougher and more water-resistant than plasterboard.

Alternatively, you could always use some old pallets. Remove the nails, sand them down, then stain or paint, according to taste.


a partially-insulated shed interior

Insulating the Floor

The obvious way to insulate a floor is to roll out some old carpet, preferably over a water-resistant membrane.

If you don’t have any to hand, many carpet retailers sell off-cuts for a reasonable price.

If you’re willing to accept a slight reduction in the height of your shed, you could even add a second, false floor.

A layer of Styrofoam, with plywood on top, works nicely.  

Buying A Better Insulated Shed

The Benefits of Tongue and Groove

If you don’t enjoy DIY and are simply in the market for a new shed, choose one with tongue and groove cladding for the best insulation.

Tongue and groove sheds are built from thick, interlocking boards, which leave no gaps, whatsoever, in the walls, floor or roof. This ensures superior levels of weathertightness and insulation.

3 Exceptionally Well-insulated Tongue and Groove Sheds

a large reverse apex shed with 2 sets of doors, 1 window and very thick walls


18 x 11 Palmako Olaf Premium Multi-room Shed

This workshop shed is divided into 2 spacious compartments and boasts incredible 88mm tongue and groove cladding, which makes it better insulated than most log cabins.

The floor and roof are built from 19mm tongue and groove, the former including treated foundation joists to protect the interior from ground moisture.

Other notable features include double doors, a separate single door and a fully-framed window.

a large wooden shed with an apex roof, double doors and very thick cladding


11 x 15 Palmako Martin Premium Nordic Shed

Also boasting ultra-insulated 88mm tongue and groove wall cladding, this wooden shed sports clean, contemporary lines, which makes for an extremely attractive appearance.

The floor and roof are, once again, built from 19mm tongue and groove cladding, whilst the wide double doors are fitted with a laminated frame and a cylinder lock, ensuring excellent security.

a large wooden shed with an apex roof, double doors, a separate single door, 2 windows and an integral log store


14 x 10 Shed Republic Ultimate Combination Workshop

This garden shed is pressure treated for a longer life, backed by a superb 15-year anti-rot guarantee and features premium 12mm tongue and groove cladding throughout.

For even greater insulation, select the optional upgrades to a 19mm tongue and groove floor with life extending floor supports.

They are installed between a paved or concrete base and the floor joists, protecting the shed from damp.

Tongue and Groove Sheds for Sale

If you’re looking to buy a better-insulated shed, you’re in exactly the right place because Buy Sheds Direct is the UK’s leading supplier of all garden sheds.

We stock a superb range of tongue and groove sheds, which are wonderfully weathertight and insulated, making them suitable for use the whole year




Images of insulation from CertainTeed