Hundreds of tiny thru-hulls
I respect Bob's knowledge tremendously. Having learned a little about boating in the Pacific Northwest on this forum, I am sure he is correct.
My opinion on wood constructed vessels was formed in Florida. Here's the story.
When I was about 15, an elderly gentleman kept his wooden trawler (can't recall the builder) in a slip at our marina. When he passed, his son asked us to pull the boat and put her on the hard, because it was less expensive and the son only wanted to sell her. She didn't sell for almost 2 years, and the buyer did not do a water test.
My dad and I put her back in the water with the buyer there watching. We were on deck, and my dad said something doesn't feel right. He opened a hatch, and quickly yelled at me to jump down into the bilge.
The visual picture of hundreds of little powerful streams of water jetting up from the entire bilge floor is seared into my memory.
Every tiny screw hole in the planking below the waterline had become a thru-hull.
We managed to get her back on the travelift before she sank.
Later, I helped the new owner replace every single screw. But it didn't work; once back in the water about a third of them still leaked.
Then, the new owner decided to fiberglass the hull below the waterline. He did a great job, and it took him about six months. The boat lasted about two years, and then we heard she sank somewhere up in north Florida.
The owner came back through the marina a few years later in another boat, and I just happened to be home from college. We were delighted to see him again and catch up.
His theory was that the fiberglass did not allow the wood to absorb water on the outer side of the hull, while the wood on the inside in the bilge expanded as it became saturated. He believes that the wet bilge wood finally expanded more than the fiberglass could take, and cracked the fiberglass below the waterline.
This is one of several wood boat experiences that we had at the marina, none positive. I have heard of wood boats going strong after 30 years, including several here on TF, and I always marvel at them. It has made me question my bias, but still... I just couldn't buy an old wood boat.