For most wells, condensation isn’t typically an issue. However, certain factors can increase the likelihood of condensation once a glass cover is installed. Below, we outline key considerations to review before fitting a glass well cover. If you’ve already installed a cover and are experiencing condensation, we offer a consultation service for £45, which includes a detailed report with tailored recommendations for your situation.
Understanding Condensation Risks
Outdoor Wells
Outdoor wells are more prone to condensation due to the temperature differences between the ground’s rising air and the cold external surface of the glass. Wells in shaded areas are particularly susceptible, as they don’t receive sunlight to warm the glass, making condensation a year-round issue.
Deep Wells
Deeper wells are more likely to experience condensation, as they allow more warm air from the ground to reach the glass, increasing the risk.
Indoor Wells
Condensation is uncommon in indoor wells. In the rare cases we’ve encountered, it typically involved unheated, vacant properties, where the indoor glass cover remained at a similar temperature to outdoor conditions.
How can you reduce the risk of condensation occurring in your well?
Indoor Wells
On a well located indoors in a heated room, usually very little is required to stop condensation occurring as the temperature of the glass will never be low enough to hit the dew point (the temperature at which condensation will form). However, we would recommend ventilating the well with piping or air bricks built into the wall of the well at opposing points (eg. north, south, east, west). Ideally positioned as close to the underside of the glass as possible to allow airflow over the surface.
For Outdoor Wells
Outdoor wells require more proactive measures. At minimum, install four air bricks or pipes near the glass underside in opposing positions (e.g., north, south, east, and west) to allow airflow. You may also cut the gasket under the glass into sections to facilitate airflow between the glass and frame.
For severe condensation, an extractor fan can be highly effective. If you believe this might be necessary, please reach out for recommendations at the time of purchase.
Alternatively, a more affordable solution is to install a waterproof heating element near the underside of the glass. These elements, often under £30, can generate enough warmth to clear condensation. This option is often worth trying before going down the road of an extractor fan which will be more costly.
Final Considerations
This guidance is provided to help assess the risk of condensation in your well cover installation. While we can’t predict condensation with 100% accuracy, most wells do not require extensive preventative measures. If your well is in a high-risk category (such as a deep, shaded outdoor well), following these steps should help address potential condensation issues effectively.
If you’d like personalized advice, feel free to reach out to us for a consultation via info@wellglass.co.uk or on 01782 45 00 40.