How to Moisture Proof a Wooden Shed

If you’re like most shed owners, you want to make sure your shed is protected from the elements.

In particular, you’ll want to keep it moisture-free since dampness can damage your tools and stored items. Here are a few tips on how to do just that.


In a discussion about moisture proofing, you might be wondering why this is different from waterproofing your wooden shed.

Waterproofing focuses on the outside of the shed, rather than the inside dampness. Additionally, waterproofing eliminates the penetrating water from rain and outside elements.

Instead, we’re talking about how to decrease potential moisture buildup in your shed in order to keep all your belongings safe and intact.



Condensation happens when there is a temperature fluctuation between the outside air and the inside air.

If your wooden shed isn’t sealed correctly around the windows and doors, you’ll begin to have humidity enter the shed, which causes the air to become damp. While possible in a wooden shed, condensation is more common in plastic and metal sheds.

Rising Damp

Rising dampness is when water floods the base of the shed and is absorbed by the floorboards, causing them to rot if not dried properly. This can be a significant issue for wooden sheds and create a great deal of moisture in your shed that is difficult to get rid of.

Penetrating Dampness

Penetrating dampness is when rain comes through the outside walls. You’ll notice this after a rainfall when the walls become wet on the inside of your shed.


Now that you have a good idea of what kind of dampness you’re dealing with, let’s talk about tips for moisture proofing your wooden shed.

First, you will need to inspect your shed thoroughly. We suggest starting at the roof, as the roof can be a huge culprit for letting in water. Make sure the shingles and roofing felt aren’t torn or missing, and take special notice of any leaks in the eaves or ridgelines.

Ventilating your shed is crucial to ensure moisture can escape. Replacing stale air can also help with the build of moisture.

Proper storage is the best way to help preserve your belongings. Invest in airtight containers to help control the amount of moisture that reaches your tools or other items.

Insulation will help keep heat inside or cool air outside, which also keeps the temperature from fluctuating drastically.

It’s best to have your shed climate controlled, and you can achieve this by installing a simple dehumidifier and/or electric heater. Having a heater set will help keep the temperature inside your shed above the dew point.

That’s it! With these tips, you can make sure your wooden shed is protected from moisture and will last for years to come.

And for a high quality wooden shed in Maine, check out our selection!

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