This blog is written in partnership with Pyramid Solutions, an External Wall Insulation company based in Essex.
External Wall Insulation, or EWI, is a system that involves the application of insulation material to the exterior surface of a building, creating a thermal envelope. The insulation layer is then covered with a protective render and decorative finish. EWI serves a dual purpose, significantly improving a building's energy efficiency and providing a shield against moisture-related issues.
So, why is EWI used for moisture management?
Condensation Control:
Controlling condensation needs to be a key consideration when applying EWI onto a building. By insulating the exterior walls, it is possible for an EWI system with the correct insulation and finish to assist in keeping the internal surfaces warmer, reducing the likelihood of moisture-laden air reaching its dew point and forming condensation. This may help to prevent the growth of mould and mildew, safeguarding indoor air quality and occupant health.
Breathability:
The use of mineral wool insulation provides improved breathability compared to some other insulation types within an EWI system. Improved breathability will allow water vapour to pass through, preventing the build-up of trapped moisture within the walls. This can assist in maintaining a balanced and healthy indoor environment while protecting the structural integrity of the building.
Thermal Bridging Reduction:
By wrapping the entire building in a continuous layer of insulation, EWI reduces thermal bridging – areas where heat can escape, or cold spots can form. This not only enhances energy efficiency but also minimises the risk of localised temperature differences that could lead to condensation and moisture-related problems.
Increased Durability:
A well designed EWI system comprising of the correct materials can contribute to the overall durability of a building by protecting the underlying structure from the detrimental effects of moisture. By managing moisture effectively, EWI can help prevent the corrosion of structural elements and deterioration of building materials, ensuring a longer lifespan for the entire structure.
External Wall Insulation has emerged as a versatile solution that can extend the life of existing buildings by providing thermal insulation to keep the old structure warm and stable. Its ability to assist with management of moisture effectively contributes to improved energy efficiency and enhanced durability. As the construction industry continues to prioritise sustainable practices, a well-designed and installed external wall insulation system is a key player in supporting buildings, not only to withstand the test of time, but also to focus on the well-being of occupants and the environment.
If you have any questions, please do not hesitate to get in contact with your local Weber contact to request a full specification for your EWI project, or to answer any questions you may have.