many questions about repairing/replacing stringers

[carboncow]

I've seen the mention of "peanut butter" before...where did you primarily use it on your build?

Does cabosoil only mix with the vinylester or does it mix with resin too?

[carboncow]

OK, looks likes the cabot mixes with resin fine.

EDITED:

1. We are going to buy from UScomposites. Their resin comes in thin and thick...but there is some warning about the thick not being idea for getting into cloth. Should we buy thick for doing vertical stringers and thing for everything else or will thin work for vertical with some patience and technique? Or should going with a faster dry...or just a few more drops of hardner. What is the best technique for vertical.

2. Can "peanut butter" be used about anywhere to fill a void? I have those small gaps we dug out near the edge of the sole where I need an inch of filler.

3. Liam, did you use tabing for deck work connecting to the sides or overlapping larger pieces...or just work with well cut larger pieces?

[dan4836]

I am using 3/4 A/C plywood with two coats of poly resin to seal it. After I install the plywood stringers into the existing cavity, I will laminate with 1708 and cap the top off with CSM.

I will be doing most of this work tomorrow so I will post some photos.

[carboncow]

Originally Posted by dan4836

I am using 3/4 A/C plywood with two coats of poly resin to seal it. After I install the plywood stringers into the existing cavity, I will laminate with 1708 and cap the top off with CSM.

I will be doing most of this work tomorrow so I will post some photos.

Dan,

We are going to use 3/4 AC too. We found all our bulkheads are mush too...so lots of cutting and reinstalling todo yet.

When you guys lay the 1708 on the deck...will you but the glass sheets to one another or will you over lap them...or some other technique? We are going to be using a textured paint when done so small imperfects will not bug us but we are still trying to figure out all the ways to terminate.

[carboncow]

Ok...today was 10 hours of removing foam (yep 2 guys)...what a pain that was. We used a garden shovel (short and flat) and the trick was to only put it in a few inches and lift...larger chunks break this way. If you go to deep you cannot get it to break well. We then used short crow bars to bust up deeper and scrape the glass clean. We still have to run some wire brushes over to clean everything off were we'll retab.

Sadly the good foam will not come out easily but the wet stuff will seperate from the hull/glass easily. For us 70% of the foam was good and could have stayed but the right think todo was to take it out to see what was under it. Nothing was smelly or rottted...just a little wet in a few corners.

Who can tell us what is the best way to prep the old glass when tabbing over. I've seen grind, dewax and clean. Can someone talk more on the deway/cleaning solutions used?

The only think I can say at this point as I feel I know enough about building skill to really give this build a C-/+ below the deck. Like Liam said it's prob not as much about bad years but bad days. We found many holes in the stringer/bulkheads not sealed and rotted, poorly terminated glass that allowed wood to have direct access to water, poor and redundant bulkhead locations...just sloppy work everywhere. I sure hope they don't build boats like this anymore!

If you look at the photo 4992 where Evan is stilling I've drew a red line below an area that they put extra glass in the back area...not sure why but it seems to be a reinforcement on both sides. The problem it's pulled up...not really delaminated, just poorly done. From what we can tell it may very well be a water channel to the stringers.

Question: Can we just grind this down and glass over and be done? Or should it be cut out as much as posible...anyone seen this before?

[Liam]

You want the thin resin for layup,you could use the thick for making thickened resin for filler but I would just and more cabosil to the thinner resin rather than ordering 2 different resins,yes you can fill those voids in the deck edge with the peanut butter,for larger holes think about adding some 1/4 chopped glass.

As you are seeing the orginal glass work was pretty shoddy,you should be able to do a way better job. I had the same glasswork peeling off in the bilge,but mine was not the original work,someone had redone mine in the past,i was able to just peel it all off. Get as much off as possible,gind and fill all the edges and spread in some slightly thickened resin. Once you have tabbed in the stringers I would lay a fresh layer of 1708 or CSM in the bilge for extra protection.

I have not installed my deck yet I am buried with yard work right now but there are 2 schools of thought on wether to overlap or not. Obviosly it will make a stronger more watertight joint but it will also create a raised area which will need more fairing.
You need to put a layer of CSM after the 1708 on the topside of the deck,this will stop the weave showing though and cut down on fairing.
You want to grind down your perimeter enough to allow for some 1708 to overlap and then the top layer of csm to overlap further without you work ending up raised compared to the original glass.

Also you will find 1708 does not work well on corners,it does not bend well,i found it best to chamfer the top of my stringers and limber holes to allow the 1708 to work better. Make a fillet of thickened resin on any insde corners that you are going to cover with 1708 as you will not get the 1708 into 90 degree corners either. Make the fillets when you are ready to lay the glass,that will make a stronger joint(wet on wet).
While you are in the bilge area,providing you transom is good you may want to cut a mousehole and fill with resin and 1/4 chopped strand around the garboard plug,then redrill for a new garboard plug,leave the outer layer of the transom glass in place and fill from the inside,this will increase the life of you transom.

[carboncow]

Originally Posted by Liam

While you are in the bilge area,providing you transom is good you may want to cut a mousehole and fill with resin and 1/4 chopped strand around the garboard plug,then redrill for a new garboard plug,leave the outer layer of the transom glass in place and fill from the inside,this will increase the life of you transom.

Man you got the best info! I'm following your solid to the "mouse hold discussion".

A surveyor on site when we picked up the old boat give our transom a "solid" rating...but that is about all we found solid. Should we clean up where the transom meets the hull and re-tab that out too as well as the drain comment from you?

[carboncow]

Where were these boats primarily made, what location?

Can one assume that other Wellcrafts (scarabs for example) have this terrible glasswork below the deck? I got a few buddies with 80s scarabs, one's a beautiful center console...I wonder how scared he'll be when he sees my photos!

[phatdaddy]

most were made in the sarasota plant. gotta remember, these hulls are 20 to 30 years old, plus the materials & techniques were still evolving.
when i cut out & replaced my deck, i bonded a 1/2 wooden tab to the underside of the lip like a shelf around the cavity. i then cut out a piece of 1/2 ply to fit the hole, then glassed over & faired to the original edge. this left the everything flush on the deck.

[bradford]

More great posts! Like the idea about the garboard drain and Phatdaddy's idea about filling the edge of the deck.

I think a lot of the quality issues come down to Wellcrafts being a mass production boat. Having an '85 and breifly an '86 there were differences in quality of hardware. Some stainless parts on my '85 were the chrome zamak pot metal on the '86. The company I'm sure was shopping prices on things to keep costs down and I'm sure this carried over to glass work as well.

I like chevy/GMC trucks. Not too many 85 models that don't need some work,have had shoddy repairs from several previous owners, or would benefit from newer technology out there. Once in a great while you run across a low mileage, garage kept, and owned by an old man cream puff.