1. Getting started
If you’ve just bought a brand new shed made from untreated timber, you’ll want to treat it straight away with wood preservative and exterior oil, reapplying each year to prolong the life of the wood. We’d recommend treating the shed before you build it to ensure better coverage on each panel and a more uniform finish.
For a shed that has already been in your garden for more than a few months, make sure you remove any algae, fungi or moss that may have grown on it. If the wooden panels have been previously stained, painted or varnished, you’ll need to strip them back to the bare wood using sandpaper.
2. Applying your wood preservative
Once you’re ready, apply your chosen wood preserver with a brush, making sure that you cover the entirety of the side of the panel that will be exposed. It’s always best to put on two or three uniform coats, waiting until each layer has fully dried before applying the next one.
3. Adding exterior wood oil
It’s definitely worthwhile applying exterior oils after the wood preserver has dried, as it provides an extra layer of protection and weather resistance. Wood preserver can take at least a day or two to fully dry, depending on how many coats you’ve used, so make sure you’re happy the surface is definitely ready.
4. Giving it a final touch
If you want to add a dash of colour to your garden and paint your shed then you’ll need to have used a wax- and silicone-free preserver. Specialist shed paints are usually designed to last up to five years and offer UV-resistance to prevent the wood greying, and help protect against moisture damage from rain. Make sure you apply paint in dry conditions, above 5°C.