What product to use to bond the stringers to the floor?, advice and opinions vary on this subject. I can only comment on how I do it. All wood is cut and shaped to fit to the hull and to each other if they interlock. Next, I mix resin and then cut with 15-20% acetone, then paint all sides of the wood. The acetone helps the resin to penetrate and waterproof the wood. Now some folks will wrap with resin and cloth, not a bad idea, I just don't do it. Once any hull penetrations are repaired, I have used epoxy, waterproof subfloor adhesive, or resin with cabosil or glass fibers to bond the stringers to the hull. Once dried, I put two strips on both sides, one tabbing about 6" wide, then over that about 8" wide. Some folks then fill the voids with foam as it helps make the hull stronger and quieter. Leave a channel for water to escape. Next the floor goes on after a waterproofing treatment, same glue/adhesive you used before on the hull, then just a few screws to hold it to the stringers. Some folks use weight to hold it down, that works also. I then tab the joint between the floor and the hull, then one full sheet of cloth over everything, overlapping about 4". OK, that's my basic method, my boats will outlast me largely because I don't leave them outside, and rarely uncovered when outside except when I using them.
