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:
All glassed in: