Moisture and debris entering through a worn threshold seal
Why it happens here
Rain and repeated door movement can harden or split a bottom seal, leaving gaps against the garage floor. Homes used for outdoor equipment near parks and trails may also track in grit that makes the gap more noticeable. A poor seal lets moisture and debris reach stored belongings.
Our approach
We inspect the bottom edge and side seals, check door contact across the threshold, and replace damaged material with a suitable profile. We also verify closing travel so the opener is not forcing the door against the floor. This addresses the gap rather than treating dampness as an opener fault.