[C320-list] 7" Hull Blister

[Ted Harrison]

Brian , I had a few blisters fixed early spring. They plastic wrapped the bottom of my boat. A large heater was placed inside and work started and finished in a heated area. The heater run all night for a few days before start and after finished. 

They dug out each blister with a grinder. 

Ted Harrison

> On Nov 2, 2016, at 6:48 PM, Amiraults Family <amiraults at sympatico.ca> wrote:
> 
> Group:
> 
> 
> 
> This was close-the-boat-for-winter-day. Thanks to the orientation of the
> hull and position of sun in sky, I made first note of a hull gel coat
> blister located just aft and above the exhaust port. It is round, 7" in
> diameter, and certainly sounds out as a void. This area is above the
> waterline and neither I nor the local fiberglass guy has an explanation for
> why it would happen.
> 
> 
> 
> My guy feels the correct solution is to open, treat, close and re gel coat
> the area. He doesn't want to do this because due to the weather in The Great
> White North the amount of weather warm enough to do it can't be expected to
> be available post haul out or pre launch. As an aside, the club cranes
> cannot lift more than 5 tons and so they arrange for commercial cranes for
> one day in the spring (early May) and one day in the fall (Nov 29 this year)
> to move heavier boats and we place 80 hulls in one day. The blister location
> is too far below the bulge of the hull and too close to the waterline to
> work on from the water. So his solution is before launch in the spring he
> will drill a small hole in the blister near the bottom and another near the
> top and then inject epoxy into the bottom until it comes out the top. Touch
> up the holes and you're done. His claim is that this will fill the void,
> reconnect the gel coat to the hull, and be possible with the likely
> available temperatures.
> 
> 
> 
> Does anyone have an insight into what may have caused the blister, and
> whether the proposed solution is sound?
> 
> 
> 
> Brian Amirault
> 
> 797 Waltzing Bear, too 
> 
> 
> 
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