69 Ouachita restore

I have been reading for months about laying a new deck and replacing stringers, so i think a have a pretty good plan. I will be posting more pictures later that i have questions about. This is what i will be working on. I hope the picures worked, if not i need help.

1st question: I used my old stringers as a template. Would it be normal that the old stringers, after drying out to become bowed? I didn't think about it until after i cut out a stringer and the tapered end doesnt lay flat to the hull, about a 2 inch gap.

I only get to work on it about 4 or 5 days a month but with the time change coming i will be able to get a little evening work in. I will take more pictures this weekendso i can ask more questions. Mostly transom stuff. Thanks everyone, like i said i've been reading alot and feel like I'm ready to tackle this.

Re: 69 Ouachita restore

OK I made a little progress. In the picture the arrow points to where the plywood ends. It is 8 ft long, a standard sheet.
What would i use as an underlayment or something to build up the fiberglass towards the front?


This picture would be the front I am building towards.

Re: 69 Ouachita restore

Welcome to Iboats dave ..

Your pics are very small and hard to see even on my big screen .. can you upload some better resolution pics please.

A 2" gap is too much for stringers .. you might want to tape some twine across your deck .. take some measurements and subtract what your going to add with deck material and glass. .. transfer that on your wood and cut it in a wedge. If Im getting what your trying to say ..

YD.

Re: 69 Ouachita restore

Thanks for the reply Yacht Dr. The photos have been resized. The 2" gap problem has been fixed. I just started over and used the string and measured every 6 inches. My main question now, in my second post is what can i used as a underlayment to build up my fiberglass after the plywood ends. It's like it was a mold or something. You can see where the fiberglass and hull meet but towards the center there is nothing between the fiberglass and hull. I was thinking maybe lay a mesh screen down and build up from that.

Re: 69 Ouachita restore

2 part expanding foam can be used if I am understanding your question. BUT why not extend the plywood to where you need it to end so you have a good transition where you need it? You don't want your new deck to be supported only by foam do you? Can you add a better/more descriptive pic?

Re: 69 Ouachita restore


The areas circled in red are your Stringer Channels. Those need to be cut out and ground down to the hull. You then put in New Stringers Fabricated from Plywood. These give structural support to the hull and support the deck as well. You then cut the plywood so it fits across the stringers and to the sides of the hull. You will use Thickened Resin (We call it PB-Peanut Butter) to fill the gap between the plywood and the hull and then use glass mat and cloth to tab the deck to the hull. You also coat the plywood with resin and glass mat. Hope this clarifies some things.

Re: 69 Ouachita restore

Thanks Wood, I've gotten this far, still a long way to go.



but i am looking to plan ahead for when i get to this area.



The red lines are fiberglass and i guess gelcoat top to the hull, nothing in between.
The black lines would be where the fiberglass and gel bridged across the stringer. There was no foam or plywood under the fiberglass.
I think I may just try to fit a piece of plywood in there, but i was thinking of something like a drywall repair kit that has a plate or screen to build your
drywall compound up to flush with your drywall. Sorry but I don't know how else to explain it.

Re: 69 Ouachita restore

Pardon the drawing, but if what you are saying is that the stringer is not high enuf in this area to rest against the bottom of the deck then one of two things. Add additional height to the stringer or Don't. The width of the span is so insignificant that the PB fillet and tabbing to the hull will render it strong enuf to support any weight it will support. If it bothers you then add some wood to the height of the stringer.

Re: 69 Ouachita restore

dave64ms said:

View attachment 185225

i am looking to plan ahead for when i get to this area.

View attachment 185226

The red lines are fiberglass and i guess gelcoat top to the hull, nothing in between.
The black lines would be where the fiberglass and gel bridged across the stringer. There was no foam or plywood under the fiberglass.
I think I may just try to fit a piece of plywood in there, but i was thinking of something like a drywall repair kit that has a plate or screen to build your
drywall compound up to flush with your drywall. Sorry but I don't know how else to explain it.

Click to expand...

Thank you for the new pics

Ok .. here is the deal with your build. I understand what your talking about now.

Basically your boat is a three part boat. You have a Hull .. you have a Liner ( of sorts ) and you have a Cap.

What your looking at is the Liner to hull joint. Its an impressive build actually ! .. They would have to Deck the Hull before the Liner went in .. or the Liner would have the Deck wood installed with it and then mated to the Stringers ( IMO this is probably what happened ). No matter which way they did it would be Very hard to keep the Liner/Deck/stringer to MATCH perfectly ..

Kinda cool actually ..

So .. you cut your Liner out in front and you had No ply or anything ( because it was part of the liner and NOT the Deck/Hull build ). Ply was not needed up there .. it would be at that point Very hard to

Now I know what your talking about when you ask about an "underlayment".

You basically have to Build that area up with glass. I know its thick .. but its a small area.

Try cardboard for your Underlayment .. You can also use formica or door skin.

If your saying that on the Sides this happened as well .. then I would suggest you bring/build the ply as close to the Chine ( Deck/Hull joint ) as possible.

It really depends if they decked/plyed the Liner .. or if they decked to the stringers and put a glass liner over that.

I know its kinda confusing .. but I will be watching this thread Very closely. I think it could be kinda technical while trying to deck this thing depending on How they built it.

Post any time .. I do work so its not normal for me to be lurking around all day on the forums .. give me some time

YD.

Re: 69 Ouachita restore

I believe you got it. If i am following correctly you are saying it was a premolded section added in. In this picture the area in red was an area where water would pool
because it wasn't flush with anything. Like a minature pool.


I think i am going to go with ply as far as i can and use the cardboard for the area left over. Still cutting stringers but trying to plan ahead.
Thanks a bunch

Re: 69 Ouachita restore

Ok i'm back for a question or few. I'm about to bed my last stringer. Using pl to bed them in. I was wondering if this was to much of a gap or will i be fine just filling it up with pl.
And a couple more questions, tabbing with 1708, 2 layers,
1- 1st layer of 1708 how much to the hull
2- 2nd layer 1708 much overlap to hull

Re: 69 Ouachita restore

Yep to much of a gap. I'd keep it no more than 1/2"
Overlap 1st 3" 2nd 6"
R U going over the top with the 1708 or stopping at the top edge?
Check the first link in my signature below

Re: 69 Ouachita restore

dave64ms said:

I believe you got it. If i am following correctly you are saying it was a premolded section added in. In this picture the area in red was an area where water would pool
because it wasn't flush with anything. Like a minature pool.
View attachment 185294

I think i am going to go with ply as far as i can and use the cardboard for the area left over. Still cutting stringers but trying to plan ahead.
Thanks a bunch

Click to expand...

Sorry for the late reply .. your thread didnt register in my subscribed thread for some reason.. or I would have gotten back to ya..

Yes.. I believe it was a premolded section that you cut out.

dave64ms said:

Ok i'm back for a question or few. I'm about to bed my last stringer. Using pl to bed them in. I was wondering if this was to much of a gap or will i be fine just filling it up with pl. View attachment 187575

And a couple more questions, tabbing with 1708, 2 layers,
1- 1st layer of 1708 how much to the hull
2- 2nd layer 1708 much overlap to hull

Click to expand...

Unfortunately again .. your pics are too small.

However I would not apply any PL Pudding to your stringers ( *thinking to self .. I just came up with a word of Pudding for PL LOL * ..

As long as the stringers do not move while you lam the glass then your fine. I dont use the PL .. I use duct tape and small tabs of mat to rigid the system before I do the full blown tabbings. ( removing the duct tape and prep the small tabs before you lam of course ).

As far as your glassing .. I personally would lay down 1.5oz mat extending outward to your final size of 1708 .. then invert your 1708 so its mat up for your finished lam. .. I would do 3 layers of inverted 1708 with 2",4",6" on the hull and all the way up your stringers. You would have to lam this all in One shot .. or your back to mat applications for your next 1708. They are not motor mounts right ? even this is over kill. .. but .. its a proxy recommendation

YD.

Re: 69 Ouachita restore

OK, photo resized.
WOG is there anything i can do besides cut another stringer. Another would be my third, i got a pinched nerve in my back from the last one. I could cut the v slope but then my floor height would be off.
And i will be stopping at the edge. Capping with CSM. Would that be correct?

Re: 69 Ouachita restore

I gotcha. Here's what I'd do. I'd use some more wood to cut the "Channel" piece and bed it into the channel and then bed the stringer on top of it. You are correct on the Tabbing method and capping with CSM. I don't recommend YD's method of Laying the 1708, but... to each his own. He's a PRO and I am not. I will say he is the only one I've ever heard recommend doing it this way. If it works for him it might work for you to. I might have to try it that way sometime just to see what happens. Like the old saying goes, "Don't knock it till you've tried it!!!"

Re: 69 Ouachita restore

WOG is this what your talking about?

Re: 69 Ouachita restore

Okay guys what did i do wrong and how do i fix it?

Re: 69 Ouachita restore

Did you bed them with PL and then try to fillet them with PB? If so, the PL takes days to cure and was still off-gassing and blew out your fillet.

Re: 69 Ouachita restore

dave64ms said:

WOG is this what your talking about? View attachment 188354

Click to expand...

Yep that's exactly what I was talking about.

Re: 69 Ouachita restore

dave64ms said:

Okay guys what did i do wrong and how do i fix it?
View attachment 188468

View attachment 188469

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Need more details. Please explain, Step by Step exactly how you installed this, materials used, and mix ratio's used. Temps at the time of install.. ALL the details please.