1973 19.6 deck install question keep liner?

[Fishmore2013]

I’m just finishing the stringer replacement and will be installing  the deck soon
My question is what is the purpose of the liner? I would feel better if I glassed the new deck to the inner hull and not the liner
Does the liner have any structural function?
Jon

[RickK]

I think we need to see some pics of what you've done so far and the areas you are concerned about.
If you want to post a pic when you talk about your boat, which you should, follow the instructions here http://classicaquasport.com/smf/index.php?topic=12725.0  - don't attach them - you are limited by file size. Uploading them into your "member gallery" is better for viewing.
Spend a few minutes to absorb the instructions. It's really easy. Remember if using a phone to take pics, to hold the phone horizontal with the lens to the left.

[Fishmore2013]

Glass to liner or hull?

[Fishmore2013]

Second picture

[Tampa Bay Mike]

Are you removing the liner? From your pics I can't see how you would be able to glass the deck to the hull without removing it. And if you remove the cap and liner so you can glass to the hull and then reuse it, you would want to glass the deck to the liner as well.

A lot of people glass the deck to the liner and don't have problems. It also looks like you have plenty of stringer to glue down to.

[Fish Head]

Have you considered raising your deck any for a better shot at having a self bailing deck. If you lay your plywood deck on top of the liner flange you will have room for a pvc 1 inch thick waterproof exterior home trim board to attach on top of your stringers. Raises your deck about a inch.  I figured I needed every inch I can get to help the bailing situation. My liner and casting deck were in great shape so I didn’t feel the need gut everything.
 Not sure if liner is structural, somebody else will weigh in on that. But to me it seems if the tops of the stringers are attached to the middle of the deck, the perimeter of deck is attached to the liner lower, top of liner is attached to top of hull and sandwiched with the cap, bottom of hull is attached to bottom of stringers. Almost like a box section  that can flex and deflect when slamming into waves?

[RickK]

Are you removing the liner? From your pics I can't see how you would be able to glass the deck to the hull without removing it. And if you remove the cap and liner so you can glass to the hull and then reuse it, you would want to glass the deck to the liner as well.

A lot of people glass the deck to the liner and don't have problems. It also looks like you have plenty of stringer to glue down to.

I agree with Mike.

[dbiscayne]

leaving the liner in place & glassing to it is a viable option, but I'd want some support/knees under the deck along that edge for more support. The liner isn't exactly flimsy, and with the deck properly attached to the mid stringers it isn't going to shift around at all, but put a heavy enough load on the deck between the stringer & liner & it could bend the deck & cause some movement at the deck/liner joint, ending up with hairline cracks in that joint over time. In reality if the deck is stiff enough it probably won't be a problem, but thats my overthinking it 2 cents.

[RickK]

I'll add that you need to see if the liner over the hull sides is attached to the cap.  If not, pop the cap and pop the liner off the sides and front and remove the whole thing.
Now you have clean attachment to the hull sides and as mentioned, your stringers are wide at the top to glue the wood down.
What is your plan to protect the wood? I would recommend hot coating the wood, both sides, and let it sink in and seal the wood.  Then lightly scruff it up, wipe it down with acetone  or depending on the resin you're using, the thinner for that. Then lay cloth or CSM on both side.
The liners are poly based so that should be your easiest mating resin but epoxy will stick to poly, poly will not be very strong attaching to epoxy. Depends on what final coating you'll be using - gelcoat, paint?
You can attach the floor to the hull sides and then cut the lip off the liner and just glue it to the sides and run a fillet along the bottom where it meets the floor - doesn't have to be attached to the liner. That is what I did.

[Fishmore2013]

First of all, thanks to everyone, really appreciate the replies. I’m mostly concerned about structural issues, if the liner serves a structural purpose then I’d like to keep it. If its not then I would just cut it out just below the gunnel and glass the deck directly to the hull. When I rebuilt the stringers I raised them about 1/2 an Inch, I didn’t want to lose too much of gunnel height.
I have 5/8 marine plywood that I’m going to cover the bottom with polyester resin, then on the top one layer of strand and one layer of cloth. I’m going to gelcoat the transom(roll it) if that goes well I may gelcoat the rest of the interior including the cap. The hull I’m planning on using an oil based marine grade paint. All though I am very impressed by the rebuilds on this site I’m not concerned with that level of detail and finish. I am going to use the boat for Charter fishing in the Connecticut river for Stripers and Blackfishing near the jetty’s along the shore. All opinions appreciated
Jon

[RickK]

If you can save the liner from the hullsides, you can glue them back in to save any fairing work from the bare glass of the hull sides.

[dbiscayne]

if you're just going with straight resin/no glass on the bottom, give it a thinned coat of resin first let that soak in good. Then a coat of straight resin. Extra money for epoxy resin on the bottom would be worth it shop around you'll find it's pretty reasonable & will outlast the poly resin.