Deck Rot but boat has NO STRINGERS? I searched!

[jrotten]

Re: Deck Rot but boat has NO STRINGERS? I searched!

George,

Thanks for your reply above. I have been supply shopping a lot trying to find a deal on resin and cloth. uscomposites seems to have good prices on poly resin between $108-125 including hardener. They have "EB" poly and "435" poly, I gotta figure out what the difference is.

Once I get the balsa down, how many layers of CSM/1708 should I top coat it with? I was thinking 4 layers CSM underneath / balsa core / 4 layers CSM with 1708 over balsa sound like a plan?

Will 5 gallons be too much resin or too little? I was gonna get unwaxed poly for the under layers, and add wax and sand for the last 2 on top of the balsa.

 

[Scott Danforth]

Re: Deck Rot but boat has NO STRINGERS? I searched!

use the 435 laminating resin.

calculate what you need, then add 50%.

 

[jrotten]

Re: Deck Rot but boat has NO STRINGERS? I searched!

OK HELP! I was gonna go back with a 3/4" balsa core as the hull was originally constructed that way, but geez I'll have $350 just in balsa and shipping by the time it gets to my door! To many $$$, the boat just isn't that nice. Would it be **possibler** to use 1-2 layers of 1/4" marine plywood as my core material and lots of CSM? Could I cut it into short planks or square tiles to prevent any weak bonds and get it to conform to the hull better and maybe use Nidabond or some other bonding compound to attach it to the hull and prevent voids and delamination? I'm pretty disheartened by the core cost. I hate to scrap it, it was my dad's boat.

 

[jbcurt00]

Re: Deck Rot but boat has NO STRINGERS? I searched!

You'll need 3+ 5gals of resin, probably more, even if you don't waste much learning to work with the polyester resin. A lot of CSM &/or 1708, and I'm not sure substituting Nidabond will save you any money. Isn't it expensive? 1/4" ply squares might save money over the balsa core, but I don't have any idea how you'll ensure that it contours to match the hull & bonds to it. Structurally. At least not inexpensively..

Look up Yacht Dr's profile. And PM him, asking for him to check in on your thread, and give him the link to your thread. Avoid asking a bunch of questions, many of the more experienced, MOD's, and pros working in the glassing business, prefer to keep Q&A's in a thread, so that others can learn from your Q's & the answers...

Sorry, I got nothing I can share, suggest or help decide how to (? or if ?) proceed. Vacuum bagging the balsa, as Scott D suggested fairly early in this thread, may be the only, 'best' way to put the hull back together....

 

[Yacht Dr.]

Re: Deck Rot but boat has NO STRINGERS? I searched!

I agree with the pics please ..

Vac bagging is gonna set you back some $ ..that you dont have ..

Sure you can scar in some ply .. but the repair is going to be Unreliable due to screwing and glue method.

How many layers of glass on the outside is/should be dictated with how thick your outside hull glass was.

Inside can be as thick as your needs to make it safe.

The Core Job that I posted ( I think its in the how toos or in the sticky Bobs new thread up top ) had a lot of fiberglass/resin/paper and fairing. ..

Pics are needed post haste.

YD.

 

[jrotten]

Re: Deck Rot but boat has NO STRINGERS? I searched!

 

[jrotten]

Re: Deck Rot but boat has NO STRINGERS? I searched!

 

[jrotten]

Re: Deck Rot but boat has NO STRINGERS? I searched!

These are pics of the hull and transom area. It is down to outer skin.

 

[jrotten]

Re: Deck Rot but boat has NO STRINGERS? I searched!

Bump. Yacht Doctor to Surgery please.

 

[Yacht Dr.]

Re: Deck Rot but boat has NO STRINGERS? I searched!

Im sorry .. but I dont know what else to say.

If your not going to recore with balsa .. then your going to attempt to recore with ply.

Like I suggested with the ply route is that it May not work.

What are you planning on doing at this point as far as core materials ?

How thick is the glass on the hull ?

YD.

 

[jrotten]

Re: Deck Rot but boat has NO STRINGERS? I searched!

The outer skin is scary thin, that's why I wanted to add some thickness with CSm before I try to core with anything. The balsa is just too expensive for a core though, and I can get 1/4" Greenwood XL plywood locally and save shipping so I have decided on plywood core. I realize poly is not a good adhesive and delamination is a real danger. That being the case, I am contemplating adding 2 stringers to reduce hull flex and fitting a layer of well sealed 1/4" marine ply between them. My big question now is what to bond the ply to the hull with to avoid high spots and get good contact.

 

[Yacht Dr.]

Re: Deck Rot but boat has NO STRINGERS? I searched!

My big question now is what to bond the ply to the hull with to avoid high spots and get good contact.

Probably the best bet would be Epoxy and cabosil (silica).

Depending on the size of the ply .. you might consider drilling a few 1" holes in the ply here and there to let air get out from behind it.

Are you sure you want to spend this kind of money in this project ? .. Just wondering ..

YD.

 

[jrotten]

Re: Deck Rot but boat has NO STRINGERS? I searched!

Haha, yeah "do I want to spend that kinda money" has come up many times. It was my dad's boat, sentimental value more than economic value. I even did a spreadsheet of material prices trying to find the best bang for the buck lol. Of course it's only economical if you only have to repair it once, thanks for your advice it is much appreciated! From what I have read here and on other sites epoxy seems to be the only way to go with this type of core. My search for cheap poly resin has turned into a search for cheap epoxy, and we all know that there is no such thing. :facepalm:

 

[jrotten]

Re: Deck Rot but boat has NO STRINGERS? I searched!

Did some reading on Nidabond today and I am intrigued. The stuff is extremely cost affective compared to poly resin alone. Gonna call Nida tomorrow and see how they feel about my 2-layers of bonded 1/4" marine ply hull composite idea. From what I have read, the stuff should be more than adequate to bond my ply core to my outer skin if I add stringers to minimize the hull flex. I'll post after I talk to these guys!