Cedar Lap Siding Grades

Do not nail through overlaps.

Cedar lap siding grades.

Cedar is also graded based on appearance which is called appearance grade or select lumber. Appearance grades use letters a through d with a being the highest grade. The two most common patterns for lap siding are going to be shiplap with a center match pattern or channel rustic. Commonly available sizes are 1 x6 1 x8 and 1 x10.

Allow a 1 8 inch expansion gap between pieces if the siding is air or kiln dried. The face side is saw textured. Highest grade fewest knots is the top of the line wood. For specific western red cedar siding grades please visit the siding grading page.

Near clear has very few very tiny knots and a median price point for the knot so fond. This is the rarest. Appearance grade is primarily for non structural lumber under 2 thick. Lap sidings are normally supplied in a variety of patterns either green unseasoned or dry in clear or knotty grades and with a smooth or saw textured face.

Clear and knotty or stk. C and better clear. Clear grades are manufactured to order. Western red cedar siding grades.

For horizontal applications start with the bottom course and work up with the channels pointing upwards. Lap sidings can come in a variety of different sizes patterns and grades. This is an architect grade. This siding type can also be supplied kilnd dried or green unseasoned.

Lap siding can be installed horizontally or vertically. There are also two other terms under appearance grade cedar. 4 3 1 2 2 1 2 4 80 1 60 6 5 1 2 4 1 2 2 67 1 33 8 7 1 2 6 1 2 1 85 1 23 10 9 1 2 8 1 2 1 41 1 18 12 11 1 2 10 1 2 1 14 1 14. Larger overlaps can be used on wider bevel sidings such as 10 and 12 in pieces see wrcla publication installing cedar siding for more information.