Just a little bit of knowledge I will pass on about bad boat building, I've worked at quite a few boat building companies and had a little input into building them.
It is wise to always encapsulate each part of the job, put the wood in the transom and cover it up, do the stringers, cover them up, bulkheads the same.
If you throw all the wood in and cover it up in one go in my opinion is not right, any water that enters into any part of the timber has the freedom to capillary along to every other put of the boat.
That's where bad boat building comes in, in quicker to do the latter with means cheaper and you won't know until your warranty has gone.
I don't know why I moan really, it's all work for me!