Polystyrene insulation, by itself, does not cause condensation. In fact, it’s often chosen for its moisture-resistant properties. Condensation occurs when moist air comes into contact with a colder surface, leading to water droplets forming. Properly installed polystyrene insulation can help maintain a consistent temperature within a building, reducing the likelihood of cold surfaces that cause condensation, however, it’s crucial to ensure that the installation is done correctly, as gaps or incorrect installation can lead to condensation issues.

In certain environments, a vapour barrier might be necessary to further reduce the risk of condensation. For guidance on correctly installing polystyrene insulation and preventing condensation in your property, feel free to contact the experts.