Houses get rained on all the time while being built but why is there no continuing mold problem after this?
In: Engineering
Lumber used in home construction is almost always sealed and treated with biocidal compounds like copper that not only naturally repel/kill pests such as termites but also inhibit the growth of mold or mildew as well.
Additionally, mold requires a favorable environment to grow- dark, warm and damp. This is why showers or bathrooms are often where you find it. That environment doesn’t persist for a home frame under normal circumstances, even after being rained on. So mold is unlikely to thrive there.
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