Dealing with condensation

Condensation is the exact opposite of evaporation. When the water vapor molecules in the warm, moist air inside an occupied tent hit the cooler tent wall, they condense out of the air and onto the tent wall. If that wall is vapor permeable and water repellent – like our inner tent fabric – the vapor passes through the wall, condenses, and can’t come back in. No tent, however, is completely condensation-proof. In some situations – rainy, windless days or colder, high humidity ones, or moisture-laden coastal conditions, for instance – condensation is simply unavoidable. Even tarps will collect condensation in these kinds of conditions. Wet humans and gear (or dogs) can also contribute to the problem. Ultimately, if the humidity outside the tent is higher than within, it is impossible to vent that moist air – unless you have a heater and a fan!

 

Use a rag

Simply wiping off the condensation from inside the tent can often prevent your gear from getting dripped upon, and it can help stop condensation from continuing to happen.

Jacket over your bag

Before going to sleep, zip your water­proof/breathable jacket over the foot of your sleeping bag. This will help keep any condensation from getting to your insulation.

Footprint

 

Using a footprint to cover the ground in the vestibules will help reduce moisture rising from the ground.