How to waterproof your shed — expert tips for winter protection

2 weeks ago 5

With winter weather setting in, protecting your garden shed from water damage becomes crucial. While you might already know ways to winterize your pipes and how to protect your garden hose from freezing temperatures, your shed needs attention too.

Experts at Garden Buildings Direct warn that neglect could lead to costly repairs or even replacement. Damp, rot, and structural issues can quickly turn your sturdy shed into a sorry sight. Spending time on preventative maintenance now is a small investment that can save hundreds in repairs and protect your garden shed for years to come.

Just as there are tried and tested ways to winterize your home and save money on your energy bills, these expert-recommended steps will help keep your outdoor structure dry and damage-free through the wet months ahead. Here's how to protect your shed, summer house, or outdoor office this winter.

1. Start with a solid foundation

Tool shed

(Image: © Shutterstock)

Ensure your shed sits on a proper base, elevated from ground contact. While a sturdy wooden base works for smaller structures, larger sheds might need concrete foundations to prevent rising damp and insect damage.

2. Check windows and doors

Shed with a lawn mower outside it

(Image: © Shutterstock)

Inspect frames carefully as wood can shrink over time, creating cracks that let water seep in. Fill any gaps you find immediately, and check the wood for signs of rot.

If you discover soft, rotted patches, remove the damaged wood and repair with wood filler. Regular maintenance of these vulnerable points is essential for keeping your shed waterproof.

3. Inspect your roof

Man on ladder working on shed roof

(Image: © Pexels)

Pay special attention to roofing felt or shingles, particularly at edges and ridge lines. Look for deterioration where materials are nailed down and patch any vulnerable areas immediately.

4. Maintain proper drainage

A gutter blocked with colorful leaves

(Image: © Shutterstock)

Clear gutters of leaves and debris to prevent water backup. Consider installing gutters if you don't have them — the runoff water can be collected in a water butt and in turn used to water your garden.

5. Ensure good airflow

White garden shed

(Image: © Shutterstock)

Install static vents on opposite sides of your shed for proper ventilation. Add to keep insects out, consider adding a bug-proof mesh that will also maintain airflow.

6. Apply preservative annually

Shed full of things

(Image: © Shutterstock)

Protect against weather damage, rot, mould, and algae with regular wood preservative treatment. Choose the right product for your needs and make application an annual routine.


Now you know how to protect your shed, consider tackling other winter preparation tasks around your property. Whether you're wondering if you should repair or replace your HVAC unit, looking for ways to ventilate a room without windows, or ready to learn why fall is the best time to prep your lawn, getting ahead of winter maintenance will save you time and money in the long run.

Here at Tom’s Guide our expert editors are committed to bringing you the best news, reviews and guides to help you stay informed and ahead of the curve!

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