need advice with 20' thompson.

[cmiller319]

I've recently acquired my grandfathers boat and it needs a bunch of work. the floor rotted out so i ripped that up. as soon as i got the flooring up i noticed pieces of the stringer were rotted. I'm going to rip out the stringers and replace the wood and refiberglass them in. my question is, will 2-3 layers of 1708 be enough fiberglass for these stringers?

 

[Woodonglass]

Welcome to iBoats!
This should be informative...Fabricating Decks, Stringers, and Transoms

 

[DeepBlue2010]

Welcome to iBoats dry dock

.Increase your post count to 3 posts total so you are able to post pictures. Alternatively, open a photobucket account, upload your pictures there and post the

 

[cmiller319]

Wow thanks for the quick response guy! I will snap some pics of under the deck tomorrow and post them. I plan on using poly resin with 1708 and csm mat. Not sure really on what wood I am going to use. The homedepot by me doesn't supply marine plywood so I was thinking about using a good pine or Whitewood.

 

[cmiller319]

I'm open to all recommendations as this boat has a lot of sedimental value and I want it done right and want it to last a long time

 

[jbcurt00]

NO pine or whitewood.

Exterior ACX plywood
MDO
Auraco

Using this layup schedule

Welcome to iBoats!
This should be informative...Fabricating Decks, Stringers, and Transoms

 

[cmiller319]

so i went to my local home depot today and all they had was bcx. there wasn't anybody at the pro desk to talk to about getting acx so I'm going to go back tomorrow and talk to somebody during business hours. if i can't get acx for some reason would bcx be okay or should i not risk it.

 

[cmiller319]

No Title

well i bit the bullet and bought marine grade plywood

 

[cmiller319]

ill finally have some time to work on the boat tomorrow. i will get the deck ripped up an hopefully you guys can give me some advice

 

[cmiller319]

Someone? Anyone?

 

[cmiller319]

No Title

well i got the floor ripped up today.the starboard stringer was rotted so i ripped it out.not sure if someone tried to fix the stringers before but it looks like it and they did a hack job.

 

[Woodonglass]

Soooo are those stringers and what you found??

 

[cmiller319]

my pictures suck sorry. the long piece of wood was what i cut and broke out of the fiberglass. i guess they used wood to keep the gas tank down? haha shotty job...

 

[cmiller319]

for stringers longer then 8' is it normal to cut two pieces of plywood to length and lap them together or is there another way(since plywood comes 4x8)? my buddy has a woodshop so its not a big deal to make them I'm just curious.

 

[Woodonglass]

OR Use 1/2" plywood and Lap joint them...three 8ft pieces will yield a 16' 1" thick stringer.

 

[cmiller319]

No Title

so am i picturing this correctly? if i cut everything as i labeled it i will get roughly 16ft? or did i view your stringer image all wrong...

 

[Woodonglass]

Yup, but in actuality,my drawing is BOGUS If you think about it, you only need to use two 8 footers on one side and on 8 footer and 2 - 4 footers on the other side to get a 16 footer.. Bottom line is...You get the idea!!!! I use Titebond III wood glue and 1 5/8" deck screws to laminate the plywood together. Makes some darn nice strong stringers using Arauco Brand Plywood!!!

 

[cmiller319]

well i ordered 4 sheets of douglas fir marine grade plywood from home depot. should be here tomorrow. maybe i will save that for the deck and find different plywood for the stringers.. i tried to order 6 sheets of arauco acx from them and they couldn't find it anywhere.

this is what i ordered.

http://www.homedepot.com/p/AB-Marin...ual-0-734-in-x-48-in-x-96-in-726540/202084532

 

[Woodonglass]

Ask them what they sell the contractors for bathroom and kitchen floor underlayment. That's the plywood I'd use for stringers. It will use 100% water proof glue and good wood laminates. How much did you pay for the MG plywood?

 

[cmiller319]

The marine grade was 90$ a sheet haha super expensive!