Cold air coming down from the loft is a common issue, particularly in homes where the loft hatch isn’t sealed properly. Even when the loft itself is insulated, gaps around the hatch allow warm air to rise and cold air to fall back into the living space.
This movement of air often makes hallways and upstairs landings feel noticeably colder than other parts of the house. Because warm air naturally rises, any opening into the loft becomes an easy escape route if it isn’t sealed tightly. This effect is often mistaken for a heating issue, especially when radiators appear to be working normally.
Sealing the edges of the loft hatch with foam strips and adding insulation above it usually reduces this airflow significantly. Once those gaps are closed, heat stays inside the home for longer and the temperature difference between floors becomes less noticeable. If upstairs rooms are still cold at night, it may also be linked to wider heat-loss issues, covered here: Why Your Bedroom Is Freezing at Night.
In some cases, cold air from the loft combines with draughts elsewhere in the house, making the problem feel worse than it is. Checking for returning draughts around doors and floors can help, which is explained in more detail here: Why Cold Draughts Keep Coming Back.
For a complete overview of reducing heat loss throughout the property, this guide explains the most effective steps to take: How to Keep a UK Home Warm for Cheap (Complete Guide).
