As part of my long
restoration, I had a couple of thru-hulls that needed glassing in. One was for the
holding tank discharge, the other wasn’t used at all (no hoses on the seacock). I will be going with a composting
head, so the
holding tank discharge was unnecessary. Many people seem to think that glassing in a thru-hull is “too big” of a
project, but I found it to be one of the easier jobs during this whole
restoration. Granted, I’ve filled in a few other thru-hulls, but these are my first below-the-waterline holes.
By following good fiberglass/epoxy procedures, the process was pretty painless. The worst part about it was grinding the huge bevel for a proper job. It took about 25-30 minutes of careful grinding to get the correct shape using a flap disk. I ended up with about a 10:1 bevel, and about 12 layers of bi-axial glass. With careful cutting of the glass disks, I was able to shape the
repair pretty flush with the
hull. Of course, it will need some grinding and fairing, but overall I am very satisfied with the
repair.
Thru-hulls in question:
After grinding:
All glassed in:
size reference:
Linear Mode
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