hearth pad

got my stove all set heat is awsome i had a installer(friend i like to do things my self )come out to double check my work everything was fine, BUT i need to put something in front of insert something fire proof 6" out on floor i went to a stone place and bought a piece of blue slate 10x30 to place in front of it ,rest it on floor.. ,do i need to put trim around it or leave it the way it is?????

That would be totally up to you, the code is for a non cumbustable surface to extend "x" amount of inches infront of the glass. The trim would be optional.

Did the hearth have to be simply non-combustible or did the manual specify a specific K or R value?

non combustible

Then your fine. Trim like Mountain Stove Guy said is up to you. I was just asking about the R or K value because if it did specify one typically a piece of stone is not sufficient at a reasonable thickness.

sorry all he said is a non cumbustible i went with 1" thick,,, how or what stone has a rating value