Fiberglass spider cracks.

[mjynthezoo]

I am not sureif this is new or unusual. Fiberglass hull is showing a few cracks that radiate outward. They are not deep but are noticable. Any idea what caused this or what to do to repair?<br />Thanks

 

[epresutti]

Re: Fiberglass spider cracks.

Mjynthezoo,<br /><br />Most spider cracks are the result of flexing, they will generally appear around solid laminates. They can also be the result of a fixed object (like a screw) that is vibrating under the glass because it is losing its "grip" and working its way out.<br /><br />Another cause can be a blunt impact. Spider cracks will continue to radiate if not repaired. They are generally not due to structural failure, however, you should investigate the source of the crack and what is behind it.<br /><br />A blunt impact crack will look like concentric circles. Flexing cracks will radiate from a center point and look less "regular". If is is a flexing crack you should investigate the posibility of reinforcing behind the crack.<br /><br />Hope this helps.<br /><br />Safe boating to all.<br /><br />Cheers.<br /><br />emp.

 

[dhammann]

Re: Fiberglass spider cracks.

Spider cracks are like wrinkles on your spouse, they come with old age. And just as you do with your spouse, live with it and appreciate what you have!

 

[mjynthezoo]

Re: Fiberglass spider cracks.

Thanks for the info. Now is there a special way to correct the damage or use the same methods for scratches etc. after checking to make sure all is well.?

 

[epresutti]

Re: Fiberglass spider cracks.

Bunches of oppinions on this one. If your spider crack is just the gell coat you can dig the cracks out, create a V and repair with gelcoat. <br /><br />Make sure you are just taking the gelcoat!<br /><br />Make sure you de-wax the effected area, clean the surface, and make sure it is completely dry. The gelcoat you are using should have instructions.<br /><br />Allow the gelcoat to extend above the crack. Sand when completely set with 320 grit or wet sandpaper.<br /><br />You also will have to consider color matching etc.<br /><br />If the cracks cover a large area you may need to grind a concave surface through the depth of the crack.<br /><br />There is a book called "Fiberglass Boat Repair & Maintenance" that is published by West Systems, it is available at West Marine. $3.00, thats three dollars! This book covers all of the questions you are asking (of course they recommend all of their products in the book, but it covers lots of techniques and types of problems).<br /><br />Hope this helps.<br /><br />Safe boating to all.<br /><br />Cheers.<br /><br />emp.