At the very least you need to seal the edges of the wood core with epoxy so it does not rot.
Quote from: wingtime on May 17, 2017, 10:14:28 AMAt the very least you need to seal the edges of the wood core with epoxy so it does not rot.My plan is to cut it out, as the previuos reply suggested. Install a rectangular hatch. It would be nice to have a larger access hatch to bige anyway. I'll seal the hatch with silicone, but do you also recommend sealing the edges of the wood core with epoxy before installing hatch?