Achieving superior energy efficiency in buildings hinges on the meticulous design and installation of airtight windows and doors. These components are pivotal in forming a continuous airtight barrier, a fundamental requirement for low-energy and Passivhaus-standard structures. A significant challenge in this endeavour is mitigating air leakage at the junctions between walls and window or door frames.
Selecting High-Airtightness Windows and Doors
To ensure optimal airtightness, it’s essential to choose windows and doors that meet Class 4 standards as per BS EN 12207. This classification represents the highest level of airtightness for such components. For instance, 21° offers triple-glazed PERFORMANCE (GBS78) and ULTRA (GBS98) windows that have undergone independent testing and third-party certification, confirming their compliance with these stringent standards.
The Role of Dual Compression Seals
A critical design feature contributing to high airtightness is the incorporation of dual compression seals. These seals establish two airtight barriers, enhancing the reliability and durability of the window or door’s performance over time. Unlike ‘flipper’ seals, which may degrade or lose effectiveness, compression seals maintain their integrity, ensuring sustained airtightness.
Impact of Frame Width on Airtightness
In timber windows, the inclusion of dual compression seals often necessitates slightly wider frames to accommodate the additional sealing mechanisms. While this might seem like a drawback, the enhanced durability and airtightness provided by these seals outweigh the minor increase in frame width. Moreover, innovative installation techniques, such as ‘wrapping’ the window frame with insulation, can effectively mitigate any aesthetic concerns related to frame size.
Installation Best Practices
Proper installation is paramount to achieving the desired airtightness. Even the most advanced windows and doors can underperform if not installed correctly. Ensuring that junctions between walls and frames are meticulously sealed is crucial. Utilizing appropriate sealing materials and techniques during installation can prevent common issues like drafts and heat loss.
Benefits of Airtight Windows and Doors
Investing in airtight windows and doors offers multiple advantages:
- Energy Efficiency: By minimizing air leakage, these components reduce the need for artificial heating and cooling, leading to significant energy savings.
- Enhanced Comfort: Airtightness eliminates drafts, maintaining consistent indoor temperatures and improving overall comfort.
- Noise Reduction: The robust sealing also acts as a sound barrier, diminishing external noise infiltration.
- Improved Indoor Air Quality: Controlled ventilation systems work more effectively in airtight environments, ensuring a steady supply of fresh air and reducing pollutants.
Conclusion
Incorporating airtight windows and doors is a critical step toward achieving energy-efficient and comfortable living spaces. By selecting components that meet high airtightness standards and ensuring proper installation, homeowners and builders can significantly enhance a building’s performance, contributing to sustainability goals and providing long-term benefits.
