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Compass Marine How To | all galleries >> Welcome To >> Sealing Deck Penetrations to Prevent Core Rot > #115 Bit - Cut-A-Way of Potted Deck Hole
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#115 Bit - Cut-A-Way of  Potted Deck Hole

#115 Bit - Cut-A-Way of Potted Deck Hole

This is the cut-a-way of the hole I cored out with the #115 bit. If you'll notice the epoxy potting is a little thicker than with the #654 bit. I don't feel this serves much of a purpose, & both will seal the deck from future moisture, but does require slightly more work in the over sizing of the top hole to 5/16" or what ever size you choose.

When you re-drill your holes, after filling them with epoxy, try and do a better job than I did of centering your bit over the original hole or your deck hardware might not line up again.

This re-drilled hole is off set to the left a little bit. Please be careful when drilling over sized holes as it makes re-drilling that much more difficult. When in doubt mark the center points of all your holes using the deck hardware as a template.

Nikon D200
1/60s f/5.6 at 70.0mm iso100 full exif

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Paul Roberts 08-Dec-2013 10:12
One additional step I use is to drill and run a tap through the hole based on matching the bolt/screw thread. This will ensure any water that makes it's way through from the top will not makes it way through the thread.
RIck Kane 21-Nov-2008 17:08
One thing you could do to help align the redrill holes would be to mark centerlines on tape beyond the tape that keeps the surface epoxy-free. For a given hole, four pieces of tape to mark two right-angle centerlines. When ready to redrill, use a straightedge to mark the intersection of the centerlines at the center of the original hole.