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Alan Wheeler · 02-12-2005, 22:46

Good question Peter. Firstly, it's not concrete. Not like the concrete you pour as a path or building structure that is. This is a special plaster mix with a very high concentration of cement and additives. New will bond to old, providing the old is well prepared and very clean.
If the Hull has been damaged due to an impact, the repair maybe as simple as knocking out all the plaster till all damaged areas have been removed. Then the armature pushed back into position and a new mix of plaster applied. If the armature has to be replaced, it is a case of knocking back the plaster past the damaged steel work and then a new segment welded in. Then once again a new batch of plaster.
I haven't carried out such a job myself yet, and I hope I never have to, but I personaly now a guy that has done this many times. He has personally built 37 FC hulls and repaired several for people. If I see him, I will ask what he does and try an provide a more detailed and accurate explanation of the process.

02-12-2005, 22:46	#72
Alan Wheeler Registered User Join Date: Dec 2003 Location: Marlborough Sounds. New Zealand Boat: Hartley Tahitian 45ft. Leisure Lady Posts: 8,042	Good question Peter. Firstly, it's not concrete. Not like the concrete you pour as a path or building structure that is. This is a special plaster mix with a very high concentration of cement and additives. New will bond to old, providing the old is well prepared and very clean. If the Hull has been damaged due to an impact, the repair maybe as simple as knocking out all the plaster till all damaged areas have been removed. Then the armature pushed back into position and a new mix of plaster applied. If the armature has to be replaced, it is a case of knocking back the plaster past the damaged steel work and then a new segment welded in. Then once again a new batch of plaster. I haven't carried out such a job myself yet, and I hope I never have to, but I personaly now a guy that has done this many times. He has personally built 37 FC hulls and repaired several for people. If I see him, I will ask what he does and try an provide a more detailed and accurate explanation of the process. __________________ Wheels For God so loved the world..........He didn't send a committee.