How to stop condensation in your loft: FOUR common causes and how to fix

Accent Group details how to minimise condensation in the home

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Condensation around the home is a constant battle through the winter months, leaving windows around our property foggy with moisture. We all know the common tricks to keep condensation at bay; by opening windows and keeping our homes warm – but not too humid through the cold weather. Insulation is a great way to make your home more energy efficient, but it could be contributing to condensation in your loft – this is how to fix it.

Why is there so much condensation in my attic?

Household insulation is great for warming up those top floor rooms, but it can make your loft space even colder.

The cold surfaces in your loft make for the perfect environment for humid air to form small moisture beads on timbers, lintels and the underside of your roof.

The four most common causes of condensation in the loft are:

  1. Additional insulation restricting air circulation – the loft stays colder than rest of house
  2. Blocked roof vents caused by storage boxes or other items stockpiled in the loft
  3. Steam from cooking, bathing rises to the loft due to poor ventilation
  4. Hot water tank releasing steam and moist air into the roof space

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How to stop condensation in your loft

While the loft is harder to reach than windows and doors, there are some simple steps which can be taken to prevent excess moisture in your roof space.

The key to preventing a build up of condensation in the highest point of your property is good ventilation.

Taking measures to ventilate your loft will disperse damp air outside rather than allowing it to settle on the chilly surfaces of your loft space.

Balancing the level of humid air with an effective ventilation system should prevent excess moisture from turning into further problems like mould.

The top three ways to reduce condensation in your loft are:

  1. Installing vents
  2. Reducing the amount of items stored in your loft
  3. Taking charge of humidity levels in the home

How to ventilate a loft

Soffit vents are one of the most popular forms of roof ventilation as they provide fresh air into the loft from a low level.

These vents also offer your loft fresh air from a tile vent or ridge at a higher level in the loft.

This multi-level ventilation system guides warm and stale air out of your home, preventing lingering moisture turning into condensation.

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As well as soffit vents, there are many other options available to improve loft ventilation.

Roof vents are typically set at a roof’s peak where air in your loft will naturally rise to.

Gable vents can provide additional airflow in lofts with soffit vents as they have controllable openings which help to drive air out of the attic.

Fans are a powerful addition to soffit, gable and roof vents as it helps to activate the air flow.

Some fans can be activated via a thermostat which start automatically when the roof space gets too warm, while others are manually controlled.

Keeping stockpiled storage away from existing vents will improve air flow, as will reducing the number of items kept in your roof space.

How to reduce humidity in your home

Addressing the amount of humid and damp air released into your property will have a huge impact on the level of condensation in your loft.

Hot air rises which means that the more steam and water vapour circulating your home, the more likely it is to reach your roof space and turn into condensation.

There are many quick swaps you can make in your everyday life to reduce humidity in your home, including:

  • Using extractor fans
  • Opening windows when cooking, bathing or showering
  • Drying clothes outdoors, not indoors

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