When traveling in waves that put sheets of water over the bow and onto the windows there was wetting beginning to take place on the teak at the lower edge of the window frame on the inside of our 37’. I’m beginning to believe it is the seal between the frame and the boat. Not the rubber seal around the window.
The other day I almost started to ask where is the water entering, around the rubber seals or around the frame/house joint.
If the house/frame joint then on the inside frame there will/should be a bunch of screws. Those screws , when tightened, pull the two frame parts together clamping the boat house between them. There should be a gasket or caulk between the house and the outer frame.
Remove the screws supporting the frame so it doesn't fall. You likely will need to cut and carefully pry the outer frame from the house.
Sharp knives, small prybars, thin wood pieces [wedges,shingles} to push into the gap as it comes free and hold the gap open slightly, glass suction cups to hold the frame/glass. I used small pry bars but think the wood would be better once the gap has been started. When they fall they won't ding the deck. Tape them into place as you go.
A Fein tool or one its competitors with a blade will help cut the caulk if it fights you. I used mine on a similar but different portlight and it was a great tool. Just be carefull to not angle it in or it may cut the house wall. I used one of the straight, plunging, blades but realized the 1/2 circle one may have been better. I would also try the scraper blade but that will be next time.
I would tape one of the thin kitchen plastic cutting mats to the area for the tool to ride on or it may scratch the house wall. They are cheap and tough. I tried.
Tape will not likely stand up
Once out then clean the caulk or old gasket off. An old but sharp chisel works very well along with one of the mini SS wire brushes. A scraper , push and pull types may also help.
Then use butyl rubber tape. Compass Marine sells good stuff. It won't let go the way typical caulks eventually do. The excess tape will need to trimmed afterwards but it will seal dead reliably.
The outer frame likely has a recess which some of the tape will embed itself into to form something like an O ring with some thickness to take up movement without letting go.
I will also 3rd or whatever the suggestion to contact Diamond Seaglaze. They were the makers of your windows for many years, may still be supplying.
