Battered and Bruised
Join Date: Nov 2010
Thanked 8 Times in 5 Posts
Rep Power: 6
Quick question to everyone with some knowledge of fiberglassing in an old through hull. I was reading the latest issue of one of my favorite sailing magazines which happened to have a very good write up of glassing in an unused, or three, through hulls. I have read else where and it was the case in this article, that the hull should be ground out in a feathered fashion creating a concave depression that has roughly a 12:1 slope to the edges.Then consecutively increasing (or decreasing depending on point of view) discs of glass matting should be cut totaling 10-12 layers in total.
Here is the part that confused me. The article has the circles of matting being laid in with the largest diameter disc first working out to the smallest. This seems backward to me. Isn't the point of the different sized discs to get them to overlap their edges as they build up? The article seems counter intuitive, I would think the smallest diameter disc would go against the through hull opening and then the next larger, next larger, and so on.
I know this was a long winded question that I could probably find a convincing answer to if I look long enough, but I know that there are several experienced glass repair folks on Sailnet that can probably set me straight without too much effort.
It's my happy pill
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