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Capillary break
A capillary break is a gap or material layer that stops water from wicking from one surface to another.
Why it matters
It keeps moisture from being pulled into framing and finishes.
Where people get this wrong
A capillary break can be a small gap. It does not always need a fancy product. If materials touch, water can bridge the gap. Details matter.
Real-world example
A deck ledger touches the siding and stays wet after storms. A small separation and proper flashing can act like a capillary break so the wall can dry.
Where this hits your build
This affects how your home handles water. Water damage is one of the most expensive problems to fix, and it often starts with details that seem small.
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