How to build a garden shed that’ll last for years

Our gardens can sometimes come with almost as much clutter as our houses. From furniture and cushions to gardening tools and paints, there’s a lot that needs to be stored, and the shed is the best place for it all.

With a big enough shed, you can keep all your garden items out of the garden, ensuring it stays a relaxing part of your home that you can enjoy.

But, if you’re going to take on this task, you want to make sure you get it right. That’s where I’d like to try and help you. Below, I’ll explain exactly how you can build a shed, from the base up, to make it last for years to come.

 

Get the shed base right

The first thing that you should look at is shed bases. If you are going to build a quality shed, you need a firm, solid base for it to sit on. It needs to be made from durable material that will last, which is why purchasing one from a reputable business rather than just finding the cheapest option around is going to be important.

Ideally, you want to research different types of shed bases, and decide which one you think is going to be best for your project based on the information that you find.

The whole point of a shed base is to allow air to circulate under the shed, minimising the risk of rot, and to support the shed itself, so it’s an essential part of the project.

 

Get the best materials

Next up on the list, you have to have the best possible materials to give you the best shed. You need strong, thick framing that will stop the shed from settling or shifting, as well as to protect the structural integrity of the structure.

You also want to watch what timber you’re using (if you’re using timber) to create the shed itself, because low quality timber isn’t going to offer the correct protection against insect damage, as well as rot.

 

Ensure you’ve planned it properly

When building a shed, you need to have thought this through carefully and come up with a plan to help it last. For example, if you’re adding windows and doors, they need to be tightly sealed to prevent any kind of moisture from entering, as this can lead to damp. As well as this, you need a strong and durable roof than overhangs on all sides to prevent any kind of water damage, including that from snow, on the walls.

It’s things like this that are commonly forgotten about, but I don’t want to see this happen to you. It might even be worth consulting an expert to ensure that your plans are solid before you get started on the construction.

 

Get building – how to build a shed that will last

Tools and materials you’ll need:

• Treated timber (for the base frame and shed frame)
• Plywood or OSB board (for flooring, walls and roof)
• Screws and galvanised nails
• Concrete mix or paving slabs
• Spirit level
• Tape measure
• Drill and screwdriver
• Circular saw
• Hammer
• Roofing felt or shingles
• Shed door and hinges
• Optional: Preservative treatment, guttering, insulation

 

Step 1: Choose the right location

• Pick a level, well-drained area away from trees or fences.
• Ensure you have enough space around the shed for access and maintenance.

 

Step 2: Build the shed base

You can choose from three common bases:

• Concrete slab (longest-lasting, most effort)
• Paving slab base (easier, suitable for most wooden sheds)
• Timber frame base (quickest, works well with treated timber and gravel)

Building a timber frame base on gravel

First, you should mark out the area of the base with pegs and string, and then excavate the right amount of soil to level the ground (around 5 to 10cm should do).

At this point, you may want to add a weed membrane to stop those pesky weeds from poking through.

Then, you can build your timber base frame. There are tons of YouTube videos that show how to do this, so head there if you’re unsure at any point. Ideally though, you need to build the pressure-treated joists in a rectangular shape that match the dimensions of the shed. Ensure the frame is completely level so the shed doesn’t warp over time.

Once your frame is in, screw some plywood boards or other treated boards on the top as something for the shed to stand on.

 

Step 3: Build the shed floor

If it’s not already built into the base:

1. Lay floor joists and secure them inside the base frame.
2. Nail/screw plywood or OSB board onto the joists.

 

Step 4: Assemble the walls

1. Construct wall frames on the ground using timber studs (like a rectangle with vertical supports).
2. Attach OSB or cladding to each frame section.
3. Raise each wall and screw it into the base and to the adjoining wall.
4. Use a spirit level to keep everything plumb and square.

 

Step 5: Add the roof frame

1. Build roof trusses (A-frame shapes) or a sloping frame, depending on your design.
2. Attach trusses to the top of the walls, evenly spaced.
3. Screw OSB or plywood onto the roof frame.
4. Overhang the roof slightly for water runoff.

 

Step 6: Install a roof covering

1. Lay roofing felt or shingles from bottom edge upwards.
2. Overlap each row for waterproofing.
3. Secure with galvanised clout nails or adhesive.
4. Add bargeboards or trim for a neat finish.

 

Step 7: Fit the doors and windows

1. Secure the shed door with heavy-duty hinges and a latch or padlock.
2. Install any window panels and seal edges with silicone if needed.

 

Step 8: Treat or paint the shed

• Apply a weatherproof treatment or paint to protect your timber.
• Consider adding guttering and a water butt to collect rainwater.

 

Final tips

• Check local planning permission. In the UK, most sheds under 2.5m tall are fine without permission
• Make sure your shed is slightly raised above ground level to prevent rot.
• Regularly maintain by treating timber annually and checking the roof.

 

Hopefully, you have found this article helpful, and now see some of the things that you need to do when it comes to building a shed. The last thing that you want is to put so much effort into building a shed, only to then find that it needs constant repairs because you didn’t take the time to understand what was needed. Now you do, and we wish you the very best of luck with constructing your shed!