Hull

The bottom hull panels of an EC 22 are two layers of 4mm plywood.





Here the first layer is being glued down.






After the first layer is on, a second layer is glued on top.

The joints are staggered.







I used a notched spreader to apply a thin coat of thickened epoxy.





Additives are used to thicken the epoxy to a consistency tailored for each job.


There are at least a half dozen additives that can be used. Phenolic microballons give the mixture I am using the brick red color.





The second layer needs to be held down firmly and evenly to make a nice epoxy sandwich.





Staples, clamps, screws, weights, whatever can hold the sandwich together.












The reason for using two layers of plywood is that up near the bow the bottom panels begin to bend quite sharply.

A single thicker layer of ply would not be able to make the bend. Even the 4mm plywood takes a good deal of force to take the bends near the bow.