CLEAR
GRADES OF WESTERN RED CEDAR BOARD AND
BATTEN SIDING
Clear Heart
The highest grade. Includes only pieces
with heartwood on the exposed face.
Many pieces completely clear, others
have minor imperfections that do not
detract from their fine appearance.
NLGA 200a
WCLIB 102-b
A Clear*
Permits somewhat more imperfections
than Clear Heart but the grade is still
restricted to pieces with excellent
appearance.
*Common specifications are A and
Better and A and Better with a percentage
of B Grade allowed.
NLGA 200b
WCLIB 102-c
B Clear
Permits slightly larger and more numerous
characteristics than A grade but occassional
pieces may require trimming to yield
high grade pieces in shorter lengths.
Most often supplied as a percentage
with A grade.
NLGA 200c
WCLIB 102-d
C and Better Clear
High quality lumber for use where
appearance is important. In addition
to interior and exterior trim, lumber
of this grade is used for cabinetry,
doors, windows and similar applications.
NLGA 202b, c
WCLIB 149-b, c
WWPA 10.11, 12
D Clear
This grade permits larger and more
numerous natural characteristics and
is used where general utility is more
important than appearance. 1 NLGA - National Lumber Grades Authority
WCLIB - West Coast Lumber Inspection
Bureau
WWPA - Western Wood Products Association
NLGA 202d
WCLIB 149-b, c
WWPA 10.13
KNOTTY GRADES OF WESTERN RED CEDAR
BOARD-AND-BATTEN SIDING
Select Knotty*
Knots are sound and tight. Other characteristics
are limited so they do not detract from
the end use intended.
*Typically available commercially
as Select allowing 10%-15% Quality Knotty
in rough or surfaced products.
NLGA 204a
WCLIB 111-e
WWPA N/A
Quality Knotty
Natural growth characteristics not
limited as stringently as in Select
Knotty. Cross cutting may be required
on some pieces to yield tight knotted
siding.
NLGA 204b WCLIB 111-f WWPA N/A
Proprietary
Graded to the manufacturer's specifications
to meet the intended end use. Boards
often represent good value in the no-hole
product range.
**Consult manufacturers for grade
descriptions and nomenclature.
NLGA N/A WCLIB N/A WWPA N/A
Standard and Better***
Suitable for exterior construction.
Occassional pieces may require trimming
to yield suitable quality for the intended
end use.
***Typically supplies as S1S2E products.
S4S products may require special ordering.
1 NLGA - National Lumber Grades Authority
WCLIB - West Coast Lumber Inspection
Bureau
WWPA - Western Wood Products Association
