Expert shares advice on how you can prevent shed rot this winter

As wet weather hits the UK, garden sheds need to be properly cared for otherwise they can be at risk of shed wood rot.

To help homeowners protect their sheds and keep them in top condition, shed expert Sam Jenkinson at garden building retailer Tiger shares his key tip for preventing shed rot this winter.

Ventilation is key

Sam said, “Ventilation is essential in preventing wood rot in sheds as it controls moisture, which is a primary cause of wood rot, however, it often gets overlooked.

“Proper airflow removes excess moisture from the air and wood structure, reducing the buildup of dampness that promotes fungal growth. It also helps prevent condensation, which can form on interior surfaces in cooler or humid conditions, leading to damp wood and increasing the risk of rot.

“By promoting continuous air circulation, ventilation keeps the shed dry and prevents the environment from becoming too humid.

“Additionally, ventilation regulates the temperature inside the shed, preventing hot, stagnant air from trapping moisture in the wood. This reduces the chances of fungal spores thriving, as they typically grow in warm, humid, poorly ventilated conditions. Maintaining good ventilation not only reduces the risk of wood rot but also extends a shed’s lifespan by preventing structural damage, making it more durable and less prone to costly repairs.”

He also shares four further tips to help prevent shed rot this winter:

1. Treat your shed with a wood preserver

Sam says: “One of the best ways to prevent leaking wooden shed walls is to treat them with a wood preservative. This should be carried out once a year to ensure it remains effective at keeping any fungi, dry rot, pests and wet rot at bay.

When applying your wood preservative, make sure your shed is completely dry as to not trap any moisture. Next, clean the surface and inspect for any damage such as signs of rot, decay, or cracks in the wood that may need to be repaired before treatment. Once this has been done, remove any hardware and lightly sand the surface as this will enhance the treatment’s absorption. Finally, once you’ve completed these tasks, you’re ready to apply the wood preservative with either a brush or roller.”

2. Keep an eye on your doors and windows

Sam shares: “Checking the frames of your wooden doors and windows in integral in keeping your shed waterproof over the winter months, as the cold weather can make the frames more prone to cracking.”

Look out for gaps in your doors and frames and check the frames and sills for signs of rot, these areas will be unusually soft. If you find any gaps, fill them with sealant, expanding foam or builders’ caulk. If you find any rotten patches, dig them out with a screwdriver and fill the area with a high-quality wood filler. Once you’ve done that, sand the area down so the filled area is flush with the rest of the wood and repaint/re-stain.”

3. Check your roof

Sam explains: “The roof of your garden building takes a real beating from the winter weather and is a hotspot for leaks – and that’s why you must look after it when moving into the colder months.

“Firstly, clear the roof of any leaves or debris so that rain, sleet and hail can easily run off. Secondly, pay close attention to the edges and ridge line for any signs of wear and tear. You can then repair shingles with sealant or replace damaged ones as required. Once completed, you can relax knowing that your shed roof is weatherproof.”

4. Reduce moisture inside

Sam says: “Check for damp items inside your shed such as paper, cardboard, and fabrics as these can soak moisture from the walls and floors of your shed. If you identify such items, remove them as soon as possible.

“A dehumidifier is another great option to keep the atmosphere inside dry. If you have an electrical supply, a desiccant dehumidifier is a good option – this type is suitable for both cold and warm climates, so it’s also arguably more suitable for UK weather when compared to a compressor dehumidifier.”