And so it begins!

[JohnC]

Okay, the first thing I have to do is the Transom. After the advice I have gotten here and reading several threads I have decided to go with 2 layers of ¾” Coosa Bluewater 26 for the core. I am using the ¾” because I plan to use the scraps for reinforcement under the deck where the console and leaning post are screwed down, 1 ½” Coosa would not fit where I need reinforcement. I plan to cut the stringers back about 12” to get some working room. My layup plan includes filling in the motor notch. All the work is done from the inside so everything is starting at the back and working to the front.
In the notch I will use 1 layer ¾ oz. mat, 1 layer 1 ½ oz. mat and then enough layers of 1708 to bring it flush with the inside of the hull, probably 4 layers (it’s just under ¼” thick average).
After the notch is flush I would put a layer of 1 ½ oz. mat and then 1708 over the entire inside of the transom to even things out. The 1708 will extend around the corners on the hull bottom and sides about 2-3” as tabbing. I would then place the first layer of Coosa then another layer of ¾ oz. mat then 1708 extending around the corners 4-5 inches for tabbing. Next is the second layer of Coosa followed by ¾ oz. mat and then 3 layers of 1708 extending around the corners progressively longer to about 9-10” for tabbing.
I would appreciate some input regarding this layup. I have not seen many posts with detailed layup schedules so I am making much of it up as I go along. I also read in “Boat Strength” that it’s important to wet out the Coosa before laying it up (I have not always done this in the past). I was just going to roll some epoxy on it before placing it in the wetted layup. Is this the right way to do it?

[shine]

You have a pretty good plan. I would probably just wait until the core was in before filling the notch.

No need for a layer of 1708 between layers of core, it will do virtually nothing for you in terms of adding strength, save it for the outside skin.

You did not mention what sort of resin you intend to use. This is pretty important, as you do not need nearly the amount of matt as your describing if you use epoxy

the overlaps are important and the longest one should be about 12" out from the core.

Im not sure how much a hurry you are in, but I have a pallet of 26 lb 3/4" transom board being shipping to me next week - I can give you a heck of a deal. It has a different name brand but its the same thing. We also have 1708, etc.

You should always roll on resin to the faces of you core material, pretty much no matter what core or resin you are using