Coastal Corrosion Check

What the Marine Layer Does to a Garage Door

A garage door a few miles inland and one near the water in Long Beach are not on the same timeline. Salt carried in the marine layer settles on everything overnight and stays behind when the moisture goes, and steel under tension does not enjoy that.

Lift Cables, the Dangerous One

A lift cable is stranded steel wound onto a drum. Salt gets between the strands, and corrosion starts on the inside where no inspection from a distance will find it.

The outside can look entirely serviceable while the core is going. Then it parts, usually on the way up, and the door rises on one side only and jams hard in the track.

We inspect cables at the drum and along their length, looking for rust bloom weeping out from between strands, flattening, and any strand standing proud of the others. That last one means the cable is already unwinding.

Springs

Corrosion on a spring coil creates stress risers, which are the points a spring eventually breaks at. A spring rated for 10,000 cycles in a dry garage may give out well short of that near the water.

We check for surface rust, pitting, and whether the coils have been lubricated at any point in their life. A dry, lightly rusted spring is on borrowed time.

The Bottom Section

Water sits along the bottom rail after rain or a wash. Salt stays behind as it dries, works into the seam, and corrodes the steel from the inside outward. By the time paint blisters, the metal underneath is usually gone.

Caught early this is a seal replacement and a clean-up. Caught late it is a section replacement, and if the model is discontinued it can force a whole new door.

Hardware

Hinges, brackets, fasteners, bearing plates and track. Galvanized and coated hardware survives here. Plain steel does not, and a seized roller bearing full of salt grit drags the door out of square.

What We Recommend Afterwards

Usually simple things. Rinse the door with fresh water occasionally, particularly the bottom. Keep the bottom seal seated so water is not sitting in the seam. Choose galvanized or coated hardware when parts are replaced. And have the cables looked at yearly rather than every other year.

Call Blitsycrafts at (562) 582-9206.