need advise on installation

[Blackstorm]

I have a 1977 MFG Gypsy Trihull
I have finished most of the removal of the old glass that was used on the sides of the old stringers. I have cut the new stringers and they look like they will fit pretty good. The old stringers were a single 3/4" plywood capped with a 3" piece of 3/8" plywood. The new stringers are 3 3/4" of plywood that are resin coated and sistered together with no cap and the outside top edge
I rounded over with a router bit.
The advise I need is do I need to put a down any fiber glass below the stringers to the hull or do I just use the PL adhesive to bed the stringers.

I also was a little aggresive with the grinder and nicked the hull pretty good in one small spot that will be under a stringer. I didn't get to the gel coat but took out more material than I wanted. I figured I would just patch with some glass mat and resin.
Thanks
Glynn

 

[lowkee]

Re: need advise on installation

Suring up that missing chunk is the way to go. A couple of layers of mat is enough. Bedding the stringers with PL is how most here, myself included, do it. The strength comes from the glassing over them once they are bedded. 3 3/4" plys is arguably overkill and heavy, but you can be sure you will never be replacing them again

Just make sure, if you are using poly, you rough up all areas the glass will touch. If it isn't rough, it won't stick.

 

[Blackstorm]

Re: need advise on installation

Thanks Lowkee,
I have roughed up and area of 8" on both sides of each stringer from bow to transom, I have fitted the port stringer set and they fit within a 1/16 of an inch. Now on to fitting the starboard side stringers and the cross pieces and the bilge area.
Glynn