Winter Condensation and Damp: How to fix it?

Sash and case windows look beautiful on a period property but in winter, older windows can be inefficient leading to condensation and damp in the home.

What is condensation, and how is it caused?
Condensation is the process where water vapour becomes liquid. All of us have some water vapour circulating in our rooms. When this moist air comes into contact with the cold impermeable surface of a sash and case window, it will release some of the moisture as water droplets on the glass. These droplets can build up, especially overnight, and create a damp layer of droplets on the window making the glass opaque. If left this condensation can create damp problems in the home as the water then drips down onto the window frame creating a pool of water at the bottom, potentially causing damp, rot, mould and mildew.

This problem is always worse during the winter months when the weather outside is colder and the rooms are heated. Cooking and hot showers can add to the moisture in the air exacerbating the issue.

What can I do to avoid condensation?

• A modern window will help to avoid this problem. The modern glass technology used in a Ventrolla sash window is fantastic at energy efficiency. The double-glazed panes and Ventrolla Perimeter Sealing System (VPSS) ensure that the cold from outside can’t enter, and warm air from inside can’t escape. These thermal efficiencies are a great way to minimise condensation. As the warm air inside the room hits the glass, it is less likely to condense if the glass panel is not cold.
• A dehumidifier in problem rooms will help to reduce the amount of moisture in the air. These can be picked up reasonably cheaply from DIY stores.
• Ventilation is key to solving the problem of condensation long-term. By making sure extractor fans are on and sash and case windows are regularly opened in rooms that generate moist air, we can help to prevent condensation from forming in the first place.

For more information about how Ventrolla sash windows could help to eliminate condensation in your house, please contact us.