Brand-new homes promise cleanliness, comfort, and quality, but they are not always free from hidden issues. Even in newly built properties, mould can become a problem. Moisture, poor construction practices, and leftover dust and debris from the building process can create ideal conditions for mould growth.
Here’s why mould can develop in new homes during the construction process:
1. Trapped Moisture in Building Materials
Wood, drywall, and insulation - common materials in construction - are highly porous and can easily absorb moisture when exposed to rain or high humidity. Poor storage and installation practices, such as failing to properly secure roofs or leaving materials exposed to the elements, can exacerbate the issue. Detecting moisture early is crucial. Any visible water stains should be addressed immediately, as they may indicate trapped moisture that could lead to mould growth over time.
2. Improper Drying and Ventilation
In the rush to complete a project, some builders may not allow sufficient drying time for materials or fail to install adequate ventilation systems. This can result in a humid, enclosed environment - an ideal breeding ground for mould. Ensuring proper airflow during and after construction helps prevent excessive moisture buildup. Installing ventilation systems promptly and allowing materials to dry thoroughly before sealing walls and ceilings can significantly reduce mould risks.
3. Construction Dust and Debris
Construction sites are filled with materials like sawdust and drywall particles. While these may seem harmless, they can retain moisture, creating conditions conducive to mould growth. In some cases, newly built homes have encountered mould problems due to construction dust absorbing moisture during rainy periods, leading to hidden mould development behind walls and ceilings.
4. Unnoticed Defects
Hidden defects such as leaks, poorly sealed windows, or improper grading can allow water intrusion, fostering mould growth soon after construction. For instance, one homeowner in the US discovered extensive mould in their basement due to an unnoticed six-foot-long crack in the foundation, which permitted water seepage.
Preventing Mould in New Construction
To minimise the risk of mould in newly built homes, consider the following precautions:
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Proper Material Storage – Keep construction materials dry and protected from the elements.
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Adequate Drying Time – Allow sufficient time for materials to dry before enclosing walls and ceilings.
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Effective Ventilation – Install ventilation systems promptly to regulate indoor humidity levels.
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Regular Inspections – Conduct thorough inspections for leaks and trapped moisture before completing the construction process with your builder.
By taking proactive measures during the building process, homeowners and builders can reduce the likelihood of mould issues, ensuring a healthier and more durable home environment.
