CanePazzo
New member
Good evening knowledgeable brethren.
So I went and brought my new (to me) Oyster 46 ketch to Italy from Greece for her refit, decided that the teak deck had to go having seen the amount of water entering through the holes of various deck fittings as they were removed. Once the teak was removed, I found that the last time the teak was renewed, the culprits had removed the teak and then cut all of the screws off at deck level ish, then laid two layers of CSM over the whole deck and then screwed down the new teak.
Removing the teak, quite a bit of glass fibre came up with it, then it was clear that the two layers of glass had been applied badly and water had been running between the layers over many years and filled up the core. The rest of the two layers of CSM have now been removed, the deck sanded to 40 grit. I got hold of a good moisture meter and all areas of sandwich deck returned a 99% reading. I have removed the top panel of glass on the aft deck as my first foray into this job. There was no surprise in what I found - balsa turned to compost where the davits are located, completely soaked balsa for most of the rest and not so wet balsa around the bulwarks.
I am running a few thoughts through my head at the moment -
Many thanks and have yourselves an awesome day!
So I went and brought my new (to me) Oyster 46 ketch to Italy from Greece for her refit, decided that the teak deck had to go having seen the amount of water entering through the holes of various deck fittings as they were removed. Once the teak was removed, I found that the last time the teak was renewed, the culprits had removed the teak and then cut all of the screws off at deck level ish, then laid two layers of CSM over the whole deck and then screwed down the new teak.
Removing the teak, quite a bit of glass fibre came up with it, then it was clear that the two layers of glass had been applied badly and water had been running between the layers over many years and filled up the core. The rest of the two layers of CSM have now been removed, the deck sanded to 40 grit. I got hold of a good moisture meter and all areas of sandwich deck returned a 99% reading. I have removed the top panel of glass on the aft deck as my first foray into this job. There was no surprise in what I found - balsa turned to compost where the davits are located, completely soaked balsa for most of the rest and not so wet balsa around the bulwarks.
I am running a few thoughts through my head at the moment -
- Am I completely nuts?
- I’m thinking to do the new core with pvc foam core material and good quality plywood in high stress areas.
- I think that I will put a layer of 1708 glass on the bottom sheet of the sandwich once any repairs have been done.
- I have been given a large quantity of ‘Proset 170/270’ epoxy adhesive. This is ready thickened epoxy, mixed on a one to one ratio. Is this suitable for installing the new core into place and remounting the cut out fiberglass deck panel eventually?
- I think that vacuum bagging is probably going to give me the best results but there are an awful lot of holes in the lower layer of fiberglass to fill first.
- once all the core has been replaced and the upper sheets of fiberglass epoxied back down, I want to lay down two layers of 1708 mat over the whole deck.
Many thanks and have yourselves an awesome day!