Is my hull bad? Replacing stringers and seeing lots of flex

[KennyCannon]

So I decided to replace stringers and floor on my 16 foot skiff. Pretty simple and straightforward job. Today after cutting the stringers out I noticed that there’s a lot of flex when I’m walking around inside the boat. When I take a step you can see it flexing under the boat. Does this mean my hull is bad? Would like to know before going out and buying glass and epoxy. Thanks!!

 

[matt167]

The fiberglass is just a shell. The structure is provided by the stringers, deck and foam. You most likely need a transom as well

 

[flashback]

Without stringers glassed in yes.

 

[jbcurt00]

Indicates the hull wasn't properly supported before you removed the stringer