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Straight answers for drivers, van-lifers and motorhome owners: condensation, keeping warm, sleeping in your vehicle and the rules. Written by our team in Redditch, with every source listed.

Guide

How to Stop Condensation in Your Car or Van Overnight

Condensation forms when warm, damp air inside your vehicle meets glass that is colder than the air's dew point, so the water vapour turns to droplets. To cut it down, let moisture out with a little ventilation all night, bring less moisture in, and keep warm cabin air off the cold glass. Thermal blinds help with that last part.

Hannah Whitlock · Updated 3 November 2026

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