Heat escaping under doors is one of the simplest reasons rooms fail to stay warm, yet it’s often overlooked. Even a small gap allows warm air to move into cooler parts of the house, reducing the temperature of the room you’re trying to heat.
This is particularly noticeable in bedrooms and living rooms, where keeping warmth contained makes a big difference to comfort. When warm air escapes at floor level, the heating system has to work harder to maintain the same temperature. This is one reason bedrooms often feel colder overnight, which is explored further here: Why Your Bedroom Is Freezing at Night.
Fitting a draught excluder or door brush helps slow the movement of air and keeps heat where it’s needed. Once this is done, rooms tend to warm more evenly and stay comfortable for longer.
If the problem persists, it’s often because cold air is entering from elsewhere and travelling through the house at floor level. Floors and hallways can play a role in this, particularly in older properties. Cold floors are discussed in more detail here: Why Floors Feel Cold in Winter.
When combined with sealing other draught points, this small adjustment contributes to better heat retention throughout the home. For a complete approach to reducing heat loss, this guide brings the key steps together: How to Keep a UK Home Warm for Cheap (Complete Guide).
