Most of the slate I find has a big 5"x5" sticker on the bottom side of the slate that says made in Italy.. Sometimes although rare I have seen it on the side's of the slate but I figure that it must be fake because it was painted on...
When they come to level the slate make sure they use a machinest level and not a standard level ie..[carpenters level]. With a machinest level put a dollor bill under one edge and the bubble moves over 1 graduation pull the bill out and the bubble moves back a gradution. This type of level is rated .0005" @ at foot were as a carpenter's level is rated .250 or 1\4"@ 4foot of level some are .125 or 1\8" @ 4 feet. You kinda see were it's going now you see why everyone is beating on the level job and not the cloth.
Do a search on how to level slate's by Glen and see if this guy is doing it similar. This way you have some ammo and understand if the installer knows what they are doing or not..
Best of luck,
Craig
When they come to level the slate make sure they use a machinest level and not a standard level ie..[carpenters level]. With a machinest level put a dollor bill under one edge and the bubble moves over 1 graduation pull the bill out and the bubble moves back a gradution. This type of level is rated .0005" @ at foot were as a carpenter's level is rated .250 or 1\4"@ 4foot of level some are .125 or 1\8" @ 4 feet. You kinda see were it's going now you see why everyone is beating on the level job and not the cloth.
Do a search on how to level slate's by Glen and see if this guy is doing it similar. This way you have some ammo and understand if the installer knows what they are doing or not..
Best of luck,
Craig