By ANSI Standard Specification A137.1 Metropolitan Ceramicsâ unglazed tile is classified as quarry tile, however, the exceptional technical characteristics noted enable them to be used in virtually any application suitable for ceramic tile. Metropolitan Ceramicsâ unglazed tile meets both the ASTM standards, the ANSI
Thickness is rated differently, depending on the material used. A thicker gutter system will be sturdier, more durable, and more expensive. Aluminum systems range from .019 to .032 inches in thickness. Copper is usually rated in weight, with a heavier weight indicating greater thickness. It is common to see 16-ounce and 20-ounce options for copper systems.
1 Aluminum is a bit more expensive, starting at $6 per piece with the most expensive gutters in the $12 range. 2  Steel gutters are much better in quality, and their price reflects this. 3  They start at $11 and oftentimes cost $33 per piece or more.4  Copper is the highest quality of all. middle-tier gutter guard with dimensions of 6 x 20' costs approximately $6. Since the average professional gutter cleaning is $75, think of this as money well spent. There are some types of gutter guards that are built in to gutters already.