How to paint a garden shed

Video by Cuprinol Garden Ideas. This walk-through is based on the video "How To Paint Your Garden Shed | Cuprinol Garden Ideas" from the Cuprinol Garden Ideas channel. It covers preparation through to the finished coat and is worth watching before you open any tins — particularly the bit on cleaning the timber down before you start.

1. Choose the right product for the job

There is a big difference between a shed paint and a fence stain, and it matters. A proper shed and fence paint — something like Cuprinol Garden Shades or Ronseal One Coat Shed & Fence Paint — is designed to soak into rough-sawn timber and flex with it as the wood moves in wet weather. Gloss paints or masonry paint are the wrong tool for this job; they sit on the surface and crack off within a season.

Water-based products have largely taken over from solvent-based ones now. They dry faster, clean up with water, and the fumes are much less unpleasant. That said, if the shed is very old and has previously been treated with a creosote-type product, you may need a solvent-based option or a specialist barrier coat first — creosote bleeds through water-based paint quite stubbornly.

2. Clear the area and protect what you are not painting

Move everything away from the shed walls — pots, furniture, bikes, anything stacked against it. Lay down a dust sheet or old cardboard under the walls to catch any drips on the path or patio. Paint on concrete is a pain to shift.

Mask up any windows with tape and newspaper or an off-cut of plastic sheeting. It takes ten minutes and saves half an hour of scraping glass afterwards. While you are at it, check the felt on the roof and any obvious gaps in the boarding — there is not much point painting a shed that is already letting water in from above.

3. Clean and prepare the timber

This is the step most people rush, and it is the main reason paint fails early. Brush off any loose flaky paint, cobwebs, and debris with a stiff brush. If the timber is green with algae or mould — common on north-facing sheds in East Kent, which barely see the sun in winter — treat it first with a garden fence cleaner or diluted fungicidal wash, rinse off, and let it dry thoroughly before you touch any paint.

Old, peeling paint should be taken back to bare wood where possible. A paint scraper and a bit of elbow grease will do it. You do not need it to be perfect, but any loose material left underneath will cause the new coat to peel in the same spots within a year. Let the timber dry for at least a day after cleaning before you start painting.

4. Apply the first coat

Stir the paint well before you start — the pigment settles in the tin. Work from the top down so any drips land on unpainted timber rather than on a section you have already done. A wide brush, around 75–100 mm, suits the broad horizontal boards most sheds have. Work the paint into the grain rather than just dragging it across the surface.

Pay particular attention to end grain — the exposed cut ends of boards, especially at the base of the shed where they sit closest to soil. End grain soaks up moisture faster than anything else and rots first. Load the brush well and work the paint in properly at those edges. The first coat will look a bit thin and patchy. That is normal. Do not go back over it while it is wet; let it dry fully.

5. Apply the second coat

Most shed paints call for two coats, and on older, thirsty timber you may find you need a third in patches. Wait for the first coat to be fully dry — at least a couple of hours in decent weather, longer if it is cool or overcast. Running your hand over it lightly will tell you; if it feels the slightest bit tacky, leave it alone.

The second coat goes on more evenly and the colour comes up much richer. Apply it the same way, top down. Mind you, do not overload the brush on vertical boards — you will get runs. Thin, even strokes are better than thick heavy ones. If you spot any drips or sags, brush them out while the paint is still wet.

6. Finish the details and tidy up

Once the main boards are done, go back round and paint the fascia boards, the door frame, and the edges of the door itself. If your shed door has been sticking in wet weather, this is a good opportunity to look at whether it needs a plane taken to it as well — a freshly painted door that does not close properly is frustrating. Paint the hinges and fixings too, or at least wipe them over; bare metal rusts quickly once the old protective finish wears off.

Peel the masking tape off the windows while the paint is still slightly soft, not after it has fully hardened — you are less likely to pull paint off the frame with it. Remove the dust sheets, check for any areas you have missed, and touch those in before putting everything back. Most shed paints are fully hardened within 24 hours, though the exact time depends on the temperature.

When to call a handyman

Give Richard a call if the shed is large or awkward to get around on your own, if the boards are badly rotten and need replacing before painting, or if the felt roof needs attention at the same time — it often makes sense to tackle both jobs together. Painting a shed is also one of those jobs that sounds simple but takes longer than expected when you factor in drying time, a second coat, and faffing around with the door and trim. Having an extra pair of hands, or just handing it over entirely, can save you the whole weekend.