Thanks for being forthright about your methods. Your into something that most of us have no experience in. I'm curious to now how it all turns out.
I never built any fiberglass hulls but I researched the method before I finally decided to go S&G. Never saw any mention of mat use in the literature and never saw any production fiberglass hulls that had mat in them. Some manufacturers have proprietary lay-ups that have a core of foam or other light weight material between two layers of glass. Cored fiberglass or Kevlar hulls are considerd top of the line.
'Glass hulled power boats use mat as a cheap way to stiffen the hull panels. Weight to them is much less an issue than with us who use muscle power.
There is a book called "Building Your Kevlar Canoe" that goes thru' the entire process of cloth lay-ups over a male mold if your interested.
Charlie

: The mold for the fiberglass kayak is built to a steve killings design and it
: was built by myself and friends strip planked and covered with 6oz cloth
: and faired with long broads. The mold is a male mold and if the frist boat
: turns out good we are going to make a female hull and deck mold and start
: useing gelcoat in the lay up. The frist hull was pulled off the mold
: yesterday. The lay up was two layers of 10 oz cloth and two layers of mat.
: the hull is stiff but still has give and weights 30 pounds which isn't bad
: because the store bought boat weight 60 pounds. the deck is going to be
: layed up of one layer of 10oz of cloth and two of mat which will be
: lighter then the hull. So hopefully the kayak will be around the some
: weight as the store bought boat. I will post some pictures soon