SHINGLES AND SHAKES 361 



Perfection-18 in. 



Variation of i in., under or over, in length, allowed in 10 per cent. Random 

 widths, but not narrower than 3 in. When dry 20 courses to measure not less than 

 8f in. To be well manufactured. Ninety-seven per cent to be clear, remaining 3 per 

 cent admits slight defects 16 in. or over from butt. 



Puget A-18 in. 



Random widths, but not narrower than 2 in. When dry, 20 courses to measure 

 not less than 8^ in. Admits feather tips and i6-in. shingles resulting from shims, and 

 other defects 8 in. or over from butt. 



Eureka-18 in. 



Variation of i in., under or over in length allowed in 10 per cent. Random 

 widths, but not narrower than 3 in. When dry, 25 courses to measure not less than 

 9! in. To be well manufactured. Ninety per cent to be clear, remaining 10 per cent 

 admits slight defects 14 in. or over from butt. 



Skagit A-18 in. 



Random widths, but not narrower than 2 in. When dry, 25 courses to measure 

 not less than 9^ in. Will admit feather tips, and i6-in. shingles resulting from shims, 

 and other defects 8 in. or over from butt. 



Extra Clear-16 in. 



Variation of i in., under or over, in length, allowed in 10 per cent. Random 

 widths, but not narrower than 2\ in. When dry, 25 courses to measure not less than 

 95 in. To be well manufactured, 90 per cent to be clear, remaining 10 per cent 

 admits slight defects 12 in. or over from butt. 



Choice A-16 in. 



Random widths, but not narrower than 2 in. When dry, 25 courses to measure 

 not less than 9 in. Admits wane and i2-in. shingles resulting from shims, and other 

 defects 6 in. or over from butt. 



Extra *A*-16 in. 



Variations of i in., under or over, in length, allowed in 10 per cent. Random 

 widths, but not narrower than 2 in. When dry, 25 courses to measure not less than 

 7 1 in. To be well manufactured. Eighty per cent to be clear, remaining 20 per cent 

 admits defects 10 in. or over from butt. If not to exceed 2 per cent (in the 20 per 

 cent allowing defects 10 in. from butt) shows defects closer than 10 in., the shingles 

 shall be considered up to grade. 



Standard A-16. 



Random widths, but not narrower than 2 in. When dry, 25 courses to measure 

 not less than 7^ in. Admits wane and i2-in. shingles resulting from shims, and other 

 defects 6 in. or over from butt. 



Probably about 90 per cent of the shingles turned out in the North- 

 west are made up of the " Extra Clear" and " Extra Star A Star" grades, 

 about equally divided. 



The following are the official specifications of the Northwestern 



