SECTION 07 46 23

CEDAR SIDING

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PART 1    GENERAL
1.1	SECTION INCLUDES
A.	Bevel siding.
B.	Tongue and Groove paneling and siding.
C.	Lap siding (shiplap).
D.	Board-and-batten siding.
E.	Shingle panel siding.
1.2	RELATED SECTIONS
A.	Section 06 10 00 - Rough Carpentry.
B.	Section 06 46 00 - Wood Trim.
1.3	REFERENCES
A.	Western Red Cedar Lumber Association (WRCLA): Publications.
1.	Designer Handbook.
2.	How to Specify Western Red Cedar.
3.	How to Install Cedar Siding.
4.	How to Finish Western Red Cedar.
5.	Standard Dry Patterns.
B.	National Lumber Grades Authority (NLGA):
1.	Standard Grading Rules.
C.	West Coast Lumber Inspection Bureau (WCLIB):
1.	Standard Grading Rules.
D.	Western Wood Products Association (WWPA):
1.	Western Lumber Grading Rules.
1.4	SUBMITTALS
A.	Submit under provisions of Section 01 30 00.
B.	Western Red Cedar Lumber Association's data sheets on each product to be used, including:
1.	Preparation instructions and recommendations.
2.	Storage and handling requirements and recommendations.
3.	Installation methods.
C.	Verification Samples: For each finish product specified, three samples, nominal size 5-1/2 inches (140 mm) square representing actual product with finished color and texture.
1.5	QUALITY ASSURANCE
A.	Manufacturer Qualifications: Must be a member of the Western Red Cedar Lumber Association. Capable of providing all Western Red Cedar siding materials specified in this section.
B.	Installer Qualifications: Must have 5 years' experience installing cedar siding of the types and sizes identified in this specification.
1.	Licensed, registered, or otherwise approved to install cedar siding by authorities having jurisdiction over the Project location.
C.	Source Limitations: Provide each type of product from a single manufacturing source to ensure uniformity.
1.6	DELIVERY, STORAGE, AND HANDLING
A.	Inspect the materials upon delivery to assure that specified products have been received.
B.	Store materials in safe area, away from construction traffic; store under cover and off ground, protected from moisture.
C.	Keep materials clearly separated and identified with grade marks legible. Keep damaged material identified as damaged and stored separately.
1.7	PROJECT CONDITIONS
A.	Maintain environmental conditions (temperature, humidity, and ventilation) within limits recommended by manufacturer for optimum results. Do not install products under environmental conditions outside manufacturer's absolute limits.
1.8	SUPPLEMENTAL MATERIALS
A.	Fasteners, Supports, and Hangers: Provided by manufacturers other than member organizations of the WRCLA. Conform to requirements set forth by this section.
PART 2    PRODUCTS
2.1	MANUFACTURERS
A.	Acceptable Manufacturer: Western Red Cedar Lumber Association, which is located at:<BR />4-32465 S. Fraser Way, Suite 415<BR />Abbotsford, BC, Canada V2T 0C7<BR />Toll Free Tel: 877-316-8845<BR />Email: request info (Mackie@realcedar.com);Web: https://www.realcedar.com/architects-builders 
B.	Substitutions: Not permitted.
C.	Requests for substitutions will be considered in accordance with provisions of Section 01 60 00.
2.2	BEVEL SIDING
A.	Clear Cedar Bevel Siding:
1.	Western Red Cedar Graded to Meet any one of the following:
a.	NLGA "Grading Standards," paragraph 201.
b.	WCLIB "Grading Standards," paragraph 106.
c.	WWPA "Western Lumber Grading Rules," paragraph 21.00.
2.	Moisture Content: Kiln-dried.
3.	A Clear grade allows slightly more growth characteristics than Clear V.G. Heart. Pieces are mixed grain (vertical and flat), graded from the surfaced face.
4.	B Clear grade allows slightly more numerous and larger growth characteristics.
5.	Rustic/Tex grade is recommended for use as sidewall covering where a saw textured appearance is desired. Contains limited characteristics that do not detract from serviceability.
6.	Delete grade, pattern, material, and finish options not required.
7.	Grade: Clear V.G. Heart.
8.	Grade: A Clear and better.
9.	Grade: A Clear and better with a percentage of B Clear allowed.
a.	B Clear Allowed: ____ percent.
10.	Grade: Rustic/Tex.
11.	Pattern: Plain Bevel.
12.	Pattern: Rabbeted Bevel.
13.	Pattern: Wavy Edge Bevel.
14.	Material: Solid wood.
15.	Material: Finger-joined/edge glued clear.
16.	Finish: Factory primed.
17.	Finish: Factory finished.
18.	Finish: Factory stained.
B.	Knotty Cedar Bevel Siding:
1.	Western Red Cedar Graded to Meet any one of the following:
2.	a.NLGA "Grading Standards," paragraph 205. 
3.	b.WCLIB "Grading Standards," paragraph 111
4.	c.WWPA "Western Lumber Grading Rules," paragraph 30.13.
5.	Moisture Content: Kiln-dried.
6.	Cross cutting may be required on some pieces to yield tight knotted siding.
7.	"Architect Knotty" is a registered trademark of the Western Red Cedar Lumber Association.
8.	"Select Knotty" is a registered trademark of the Western Red Cedar Lumber Association.
9.	Delete grade, pattern, texture, and finish options not required.
10.	Grade: Architect Knotty.
11.	Grade: Select Knotty.
12.	Grade: Select Knotty with a percentage of Quality Knotty allowed.
a.	Quality Knotty allowed: ____ percent.
13.	Grade: No. 3 common (WWPA Rules).
14.	Pattern: Plain Bevel.
15.	Pattern: Rabbeted Bevel.
16.	Pattern: Wavy Edge Bevel.
17.	Texture: Smooth-Faced.
18.	Texture: Saw-Textured.
19.	Finish: Factory primed.
20.	Finish: Factory finished.
21.	Finish: Factory stained.
2.3	TONGUE-AND-GROOVE SIDING
A.	Clear Cedar Tongue-and-Groove Siding:
1.	Western Red Cedar Graded to Meet any of the following:
a.	NLGA "Standard Grading Rules," paragraph 200.
b.	WCLIB "Grading Rules," paragraph 102.
c.	WWPA "Western Lumber Grading Rules," paragraph 20.10.
2.	Moisture Content: Kiln-dried.
3.	NOTE ** Clear Heart grade is the highest grade, with only heartwood on exposed faces. Many pieces are clear, and others have minor imperfections that do not detract from their appearance.
4.	A Clear and Better grade permits more imperfections than Clear Heart grade but is still restricted to pieces with excellent appearance.
5.	B Clear grade permits slightly larger and more numerous characteristics than A Clear and Better grade. Delete grade, pattern, texture, and finish options not required.
6.	Grade: Clear Heart.
7.	Grade: A Clear and Better.
8.	Grade: A Clear and Better with a percentage of B Clear allowed.
a.	B Clear Allowed: ____ percent.
9.	Pattern: V-grooved two sides (EV2S) WRCLA TG2.
10.	Pattern: V-grooved one sides (EV1S) WRCLA TG1.
11.	Pattern: Center matched WRCLA TG0.
12.	Pattern: WP-6.
13.	Pattern: 102.
14.	Pattern: 106.
15.	Pattern: Custom ________.
16.	Texture: Smooth face.
17.	Texture: Resawn face.
18.	Finish: Factory primed.
19.	Finish: Factory finished.
20.	Finish: Factory stained.
B.	Knotty Cedar Tongue-and-Groove Siding:
1.	Western Red Cedar Graded to Meet any one of the following:
2.	a.NLGA "Standard Grading Rules," paragraph 204.
3.	b.WCLIB "Grading Rules," paragraph 111.
4.	c.WWPA "Western Lumber Grading Rules," paragraph 30.13.
5.	Moisture Content: Kiln-dried.
6.	Grade: Select Knotty.
7.	Grade: Select Knotty with a percentage of Quality Knotty allowed.
a.	Quality Knotty Allowed: ____ percent.
8.	Grade: No 3 Common (WWPA rules).
9.	Pattern: V-grooved two sides (EV2S) WRCLA TG2.
10.	Pattern: V-grooved one side (EV1S) WRCLA TG1.
11.	Pattern: Center matched WRCLA TG0.
12.	Pattern: WP-6.
13.	Pattern: 102.
14.	Pattern: 106.
15.	Pattern: Custom ________.
16.	Texture: Smooth faced.
17.	Texture: Resawn.
18.	Finish: Factory primed.
19.	Finish: Factory finished.
20.	Finish: Factory stained.
C.	Proprietary Knotty Cedar Tongue-and-Groove Siding:
1.	Moisture Content: Kiln-dried.
2.	Grade: ________.
3.	Pattern: ________.
4.	Texture: ________.
5.	Finish: Factory primed.
6.	Finish: Factory finished.
7.	Finish: Factory stained.
2.4	LAP SIDING (SHIPLAP)
A.	Clear Cedar Lap Siding: 
1.	Western Red Cedar Graded to Meet any one of the following:
a.	NLGA "Standard Grading Rules," paragraph 200.
b.	WCLIB "Grading Rules," paragraph 102.
c.	WWPA "Western Lumber Grading Rules," paragraph 20.10.
2.	Moisture Content: Kiln-dried.
3.	Grade: Clear Heart.
4.	Grade: A Clear and Better.
5.	Grade: A Clear and Better with a percentage of B Clear allowed.
a.	B Clear Allowed: ________ percent.
6.	Pattern: Channel Siding EV2S WRCLA SL3.
7.	Pattern: WP-11 WRCLA SL1.
8.	Pattern: 101 WRCLA SL4.
9.	Pattern: 105 WRCLA SL5.
10.	Pattern: Log Cabin.
11.	Pattern: Custom ________.
12.	Texture: Smooth faced.
13.	Texture: Resawn.
14.	Finish: Factory primed
15.	Finish: Factory finished.
16.	Finish: Factory stained
B.	Knotty Cedar Lap Siding:
1.	Western Red Cedar Graded to Meet any one of the following:
a.	NLGA "Standard Grading Rules," paragraph 204.
b.	WCLIB "Grading Rules," paragraph 111.
c.	WWPA "Western Lumber Grading Rules,"paragraph 30.10.
2.	Moisture Content: Kiln-dried.
3.	Delete grade, pattern, texture, and finish options not required.
4.	Grade: Select Knotty.
5.	Grade: Select Knotty with a percentage of Quality Knotty allowed.
a.	Quality Knotty allowed: __________ percent.
6.	Pattern: Channel Siding EV2S WRCLA SL3.
7.	Pattern: WP-11 WRCLA SL1.
8.	Pattern: 101 WRCLA SL4.
9.	Pattern: 105 WRCLA SL5.
10.	Pattern: Log Cabin.
11.	Texture: Smooth faced.
12.	Texture: Resawn.
13.	Finish: Factory primed.
14.	Finish: Factory finished.
15.	Finish: Factory stained.
C.	Proprietary Knotty Cedar Lap Siding:
1.	Moisture Content: Kiln-dried.
2.	Grade: ________.
3.	Pattern: ________.
4.	Texture: ________.
5.	Finish: Factory primed.
6.	Finish: Factory finished.
7.	Finish: Factory stained.
2.5	BOARD-AND-BATTEN SIDING
A.	Clear Cedar Board-and-Batten Siding:
1.	Western Red Cedar Graded to Meet any one of the following:
a.	NLGA "Standard Grading Rules," paragraph 200.
b.	WCLIB "Grading Riles," paragraph 102.
c.	WWPA "Western Lumber Grading Rules," paragraph 20.10.
2.	Moisture Content: Kiln-dried.
3.	Delete grade, surface, moisture content, and finish options not required.
4.	Grade: Clear Heart.
5.	Grade: A Clear.
6.	Grade: A Clear and Better.
7.	Grade: A Clear and Better with a percentage of B Clear allowed.
a.	B Clear allowed: ____ percent.
8.	Grade: C Clear and Better.
a.	D Clear allowed: ____ percent.
9.	Surface: Rough sawn.
10.	Surface: Surfaced one side and two edges (S1S2E).
11.	Surface: Surfaced four sides (S4S).
12.	Moisture Content: Kiln-dried.
13.	Moisture Content: Green (unseasoned).
14.	Finish: Factory primed.
15.	Finish: Factory finished.
16.	Finish: Factory stained.
B.	Knotty Board-and-Batten Cedar Siding:
1.	Western Red Cedar Graded to Meet any one of the following:
a.	NLGA "Standard Grading Rules," paragraph 204.
b.	WCLIB "Grading Rules," paragraph 111.
c.	WWPA "Western Lumber Grading Rules," paragraph 30.13.
2.	Moisture Content: Kiln-dried.
3.	Grade: Select Knotty.
4.	Grade: Select Knotty with a percentage of Quality Knotty allowed.
a.	Quality Knotty allowed: __________ percent.
5.	Surface: Rough sawn.
6.	Surface: Surfaced one side and two edges (S1S2E).
7.	Surface: Surfaced four sides (S4S).
8.	Moisture Content: Kiln-dried.
9.	Moisture Content: Green (unseasoned).
10.	Finish: Factory primed.
11.	Finish: Factory finished.
12.	Finish: Factory stained.
C.	Proprietary Knotty Board-and-Batten Cedar Siding:
1.	Grade: ________.
2.	Pattern: ________.
3.	Texture: ________.
4.	Moisture Content: Kiln-dried.
5.	Moisture Content: Green (unseasoned).
6.	Finish: Factory primed.
7.	Finish: Factory finished.
8.	Finish: Factory stained.
2.6	SHINGLE PANEL SIDING:
A.	Western Red Cedar Clear Sidewall Shingles applied to backer-board.
1.	Moisture Content: Kiln-dried.
2.	Surface: Smooth.
3.	Grade: Clear vertical grain.
4.	Grade: Clear mixed grain.
5.	Configuration: 1 course.
6.	Configuration: ________.
7.	Butt Line: Even.
8.	Butt Line: Staggered.
9.	Butt Pattern: Keyway or contemporary.
10.	Butt Pattern: ________.
11.	Finish: Unfinished.
12.	Finish: Factory primed.
13.	Finish: Factory finished.
14.	Finish: Factory stained.
2.7	FASTENERS
A.	Nails: 
1.	Material: No. 304 stainless steel.
2.	Material: No. 316 stainless steel.
3.	Material: Hot-dipped galvanized per ASTM A-153.
4.	Material: Aluminum.
5.	Type: Splitless siding nails.
6.	Type: Spiral shank.
7.	Type: Ring shank.
8.	Type: Textured head.
9.	Type: Blunt tip.
10.	Length: Sufficient to penetrate solid wood a minimum of 1-1/4 inch (32 mm).
2.8	PROTECTING FINISH
A.	Penetrating Stain: Follow guidelines of Western Red Cedar Lumber Association.
1.	Water repellant.
2.	Fungus and mildew resistant.
3.	Ultraviolet (UV) light resistant.
4.	Finish Type: Transparent.
5.	Finish Type: Semi-transparent.
6.	Finish Type: Bleaching or weathering products.
7.	Finish Type: Solid stain.
8.	Finish Type: Paint.
9.	For Solid Colors: 
a.	Primer: Alkyd oil type is recommended.
b.	Topcoats: 100 percent acrylic latex.
c.	Color: ________. Manufactured By: ________.
d.	Color: As determined by the Architect.
e.	Color: As designated on the Drawings.
B.	Adhere to coating manufacturer's instructions.
PART 3    EXECUTION
3.1	EXAMINATION
A.	Coordinate work with related trades. Allow installation of related work to avoid cutting and patching.
B.	Do not begin installation until substrates have been properly constructed and prepared.
C.	If substrate preparation is the responsibility of another installer, notify Architect in writing of unsatisfactory preparation before proceeding.
3.2	PREPARATION
A.	Clean surfaces thoroughly prior to installation.
B.	Prepare surfaces using the methods recommended by the manufacturer for achieving the best result for the substrate under the project conditions.
C.	Scribe and cope siding boards for accurate fit. 
D.	Select siding boards of longest possible lengths. Discard boards that are warped, twisted, bowed, crooked or otherwise defective.
3.3	INSTALLATION
A.	Install in accordance with manufacturer's instructions, approved submittals, and in proper relationship with adjacent construction.
1.	Install products according to Western Red Cedar Lumber Association installation guidelines and with adherence to local building codes and regulations where the Project is located.
2.	Follow installation instructions specified in the Western Red Cedar Lumber Association's Installing Cedar Siding publication.
B.	Finish materials on all sides and ends. Apply touch up coating on new cuts. 
1.	Factory primed or finishing is preferred.
3.4	FIELD QUALITY CONTROL
A.	Field Inspection: Coordinate field inspection in accordance with appropriate sections in Division 01.
3.5	CLEANING AND PROTECTION
A.	As work proceeds, maintain premises free of unnecessary accumulation of tools, equipment, surplus materials, and debris related to this work.
B.	Clean cedar siding in accordance with the manufacturer's recommendations. 
C.	Touch-up, repair or replace damaged products before Substantial Completion.
3.6	MAINTENANCE
A.	Explain proper maintenance procedures to owner or owner's representative at project closeout.
B.	Visually inspect siding, caulking, flashing annually for overall condition. Re-apply caulking and coating, as necessary. Adjust flashing as required.
C.	The use of pressure washers is not recommended.

END OF SECTION