That is probably due to the angle of the stem and stern being to steep. i had the same issue with my kayaks and i used skinboats instructions as a guide. I sewed a pocket in the stem and stern and this alleviated the problem you are describing. I would check out Skinboats.com they have videos that show how to do it as well.

Peter

: G'Day All!

: I'm building one of Dave Gentry's Chuckanut 12's. The frame is
: finished, and I'm now working on the fabric (8 0z polyester).
: Dave recommends covering the hull and deck separately, stapling
: the fabric to the gunwales, but I like the looks of those rolled
: and whip stitched seams running down the deck centerline so much
: that I decided sew it on in one piece, instead. Following Jeff
: Horton's procedure in his Kudzucraft video, I started in the
: center and worked toward the ends. From the bow to the aftermost
: frame, everything is fine, but from the last frame to the stern,
: I've got so much extra fabric on deck that it looks like it's
: pleated.

: I'm about ready to admit defeat, staple the hull fabric to the
: gunwales, and order enough more fabric to do the deck
: separately. Such a solution sure runs counter to my cheapskate
: philosophy though. Can y'all help me salvage the situation?

: Thanks, Ronnie