Hi Daniel - welcome to the forum!
The map is made out of a lightweight plastic - not condusive to lamination - we went for asthetics instead. While the plastic is pretty durable, I play with mostly metal miniatures, so I use a couple sheets of 4'x3' plexiglass to lay over the map to prevent the metal from scratching the plastic. I think others that play the game with metal pieces (as opposed the plastic pieces) have gone the same route with the plexiglass.
Mark