It is imperative to ensure that homes under construction are fully weathertight before proceeding with insulation and drywall installation. This step is crucial to prevent moisture-related issues that can compromise the structural integrity and indoor air quality of the building due to the building’s inability to dry out.
Homes where insulation and interior finishes are installed prior to ensuring the building is weathertight will lead to wet assemblies that can lead to numerous defects that will become apparent during the first 5 years of the home including deterioration of building materials and mould, leading to increased home warranty claims and expensive repairs; stress on new home buyers and lower customer satisfaction scores.
Key Steps to Ensure Weathertightness:
- Inspect Roofing and Flashing:
- Ensure all roofing materials are properly installed and sealed.
- Check that flashing around chimneys, vents, and skylights is secure and watertight.
Seal Windows and Doors:
- Verify that all windows and doors are installed correctly with appropriate flashing and sealants.
- Inspect for any gaps or cracks that could allow water infiltration.
- Check Weather Resistant Barrier or Exterior Cladding:
At a minimum, a WRB or second plane of protection must be established before insulation and interior finishes are installed.
Ensure that siding, brick, or other exterior cladding materials are properly installed and sealed.
- Pay special attention to joints, corners, and edges.
- Inspect Foundation and Basement:
- Confirm that the foundation is free from cracks and properly sealed.
- Ensure that basement walls and floors are protected against moisture intrusion.
Verify Proper Drainage:
- Check that gutters, downspouts, and drainage systems are installed and functioning correctly.
- Ensure that water is directed away from the building foundation.
Conduct a Final Weathertightness Inspection:
- Perform a thorough inspection to identify and address any potential issues before proceeding with insulation and drywall.
By following these steps, you can ensure that your homes are protected from moisture-related problems, leading to better durability, energy efficiency, and occupant comfort.
Thank you for your attention to this critical aspect of construction.
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