When temperatures drop and heating goes on, roof ventilation quietly does one of the most important jobs in your home: protecting your roof from condensation, damp, and long-term damage. At Kytun, we’ve been designing and manufacturing roof ventilation systems built for Ireland’s unpredictable weather for over 35 years. Whether you’re working on a new build or upgrading an existing property, good ventilation keeps timber strong, insulation dry, and energy bills lower.

Why Roof Ventilation Matters in Winter

Winter brings a perfect storm for condensation. Here’s the science bit: warm, moist air rises from inside the home and meets cold roof surfaces.

Without adequate airfl ow, moisture collects on timbers and insulation, leading to:

• Timber rot and mould growth
• Reduced insulation performance
• Staining or damp patches on ceilings
• Long-term structural issues

A well-ventilated roof prevents these problems by allowing air to circulate freely, carrying away moisture before it can condense. The result? A warmer, drier, longer-lasting roof – and a healthier home.