Pin Holes in Hull

[barbender55]

HI gents. I am working on my boat when I noticed a few small pin holes in the hull that was leaking a tiny drop of water. The water was no bigger than a pin head big. I am in the process of sanding the old anti fouling and repainting. Does this mean I need to re gelcoat the whole hull or will the new anti fouling fix the problem. There is not a lot of these holes maybe 8 or 9. Any suggestions on what this might be. Thanks in advance.

 

[Solittle]

Re: Pin Holes in Hull

I am not a hull expert but I suggest that you do some research on what is called blisters.

 

[Dunaruna]

Re: Pin Holes in Hull

No expert here either. Osmosis can cause pin holes and blisters. <br /><br />Good luck.<br /><br /> http://www.41south.co.nz/marine_services.htm <br /><br /> http://www.hotvac.com/what/default.asp <br /><br />Aldo

 

[cc lancer]

Re: Pin Holes in Hull

If the water is coming from the anti-fouling paint, it maybe from air bubbles that were trapped when the paint was applied.<br /><br />If it is coming from the sanded gelcoat, and is a "brownish color" then you have water behind the gel coat.

 

[John Greviskis]

Re: Pin Holes in Hull

Sounds like a small case of osmotic blistering.

 

[Boatdrinks]

Re: Pin Holes in Hull

I don't know much about blisters at all...sorry. But I am curious. Let us know how it turns out!

 

[barbender55]

Re: Pin Holes in Hull

First of all thanks to those who have responded. The amount of expertise here is overwhelming and the fact that you are willing to help a stranger is much appreciated. After looking at it again I think it might be some small blisters. I sanded down one of the wet spots and noticed a tiny hole once I got through some of the paint. Is this something that should be fixed spot by spot or should I be looking at doing more to the whole hull?

 

[Nittany]

Re: Pin Holes in Hull

barbender;<br /><br />it's hard to say exactly without seeing your hull firsthand, but if it is osmotic blistering you are going to have to grind them out before repainting your hull.<br /><br />also, you are going to need a moisture meter to tell you when your hull is dry enough to paint.<br /><br />you'll want to talk to someone who knows alot more about it than me, however.