One way that water vapor can get into the crawlspace is through the door. This is actually pretty common, as many crawlspace doors have gaps around them, which allowing air to flow into the crawlspace where the water vapor will start to condense. Once the water condenses onto different areas in the crawlspace (particularly organic surfaces), mold can begin to grow, which can cause serious problems for the homeowner.
The "before" picture shows pretty much exactly what was just explained. This certainly was not the worst crawlspace entrance, but we have certainly seen better! As you can see, the top and right-hand side of the door have pretty large gaps, which leaves a lot of room for air to rush in. The EverLast door will be even more effective since this door is almost even with the ground, which means in a flood, water could pretty easily get into the crawlspace.
The "after" picture shows the installed EverLast Door. It may not be as pretty or "rustic" as the old door, but it is certainly more effective at keeping the air out! The EverLast door creates an airtight seal when "shut", which you do by turning the knobs at the upper corners. This was a huge part of this job because it helps to keep the dehumidifier from working as hard because it keeps out unnecessary moisture.
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