Siding

Real Cedar Siding

Introduction
Siding Home
Why Real Cedar?
Western Red Cedar Characteristics
Sustainability
Design & Spec
Siding Profiles
Bevel Siding
Board and Batten Siding
Tongue & Groove Siding
Lap or Channel Siding
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Shingle Panels
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Preparation For Installation
Pre-Building Tips
DuPont™ Tyvek® DrainWrap™
Installation
General Installation
Installing Profiles
Bevel
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Tongue & Groove
Lap or Channel
Trim Boards
Shingle Panels
Finishing
How to Finish
Types of Finishes
Care & Maintenance
Restoration
Decking

Real Cedar Decking

Introduction
Decking Home
Why Real Cedar?
Western Red Cedar Characteristics
Sustainability
Planning
Decking Calculator
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Fastener Recommendations
Stair & Railing Installation
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Outdoor

Real Cedar Outdoor

Introduction
Outdoor Home
Why Real Cedar?
Western Red Cedar Characteristics
Sustainability
Design & Spec
Real Cedar Free DIY Project Plans
Design Tips
Building
Project Preparation
Outdoor Fasteners
Fence Construction
Fence Specifications
Prebuilt Fence Panels
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Finishing Techniques
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Care & Maintenance
Indoor

Western Red Cedar Indoor

Introduction
Indoor Home
Why Real Cedar?
Western Red Cedar Characteristics
Sustainability
Planning
Cedar Saunas
Traditional Saunas
Infrared Cedar Sauna
Cedar Indoor Design Tips
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Timbers

Real Cedar Timbers

Introduction
Timbers Home
Why Real Cedar?
Western Red Cedar Characteristics
Sustainability
Planning
Grades and Specifications
Building
Preparation
Installation
Maintenance
Finishing
Restoring Western Red Cedar Timbers
Care & Maintenance
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Contact

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Tongue & Groove Siding

Tongue and Groove Characteristics

Western Red Cedar tongue and groove is widely used for its good looks and versatility. It can be installed horizontally, vertically or diagonally, each method giving a distinctly different look. Tongue and groove siding is available with rough or smooth faces. Both seasoned (kiln-dried) and unseasoned (green) sidings are available.

Tongue and Groove Cedar Siding Lake View

Joints

The joints between adjoining pieces are usually v-shaped but flush jointed, reveal and radius joints are also available. The different joints and surface textures in tongue and groove siding combine to provide a range of shadow line effects that enhance the product’s versatility.

Grades

Tongue and groove siding is manufactured in clear grades suitable for a more formal, elegant appearance, particularly when pieces are smooth faced. Knotty grades are in demand for their smart, casual look.

Tongue and Groove Grades

Tongue and groove siding is available with rough or smooth faces. Both seasoned (kiln-dried) and unseasoned (green) sidings are available.

The joints between adjoining pieces are usually v-shaped but flush jointed, reveal and radius joints are also available. The different joints and surface textures in tongue and groove siding combine to provide a range of shadow line effects that enhance the product’s versatility.

Clear Heart

Clear Heart Cedar Siding

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.

Grading Paragraph

NLGA 200a
WCLIB 102-b
WWPA 20.11

Mixed Grain (MG) or Vertical Grain (VG) may be specified

A Clear*

A Clear Cedar Siding

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 clear allowed.

Grading Paragraph

NLGA 200b / 200c
WCLIB 102-c
WWPA 20.12

Mixed Grain (MG) or Vertical Grain (VG) may be specified

Select Knotty

Select Knotty Cedar Siding

Available kiln dried or unseasoned. Knots are sound and tight.

*Common specifications is select Knotty with a percentage of quality Knotty allowed.

Grading Paragraph

NLGA 204a
WCLIB 111-e
WWPA N/A

Proprietary Grades

Proprietary Grade Cedar Siding

Designed to meet appearance requirements for cedar sidings and trim. Ask your WRCLA distributor for details.

*Manufacturers may market their own proprietary grades.

Grading Paragraph

NLGA N/A
WCLIB N/A
WWPA N/A

Standard and Better

Standard or Better Cedar Siding

Suitable for exterior construction. Occasional pieces may require trimming to yield suitable quality for the intended end use.

Grading Paragraph

NLGA 114a, b, c
WCLIB 118-a, b, c

NLGA – National Lumber Grades Authority
WCLIB – West Coast Lumber Inspection Bureau

Tongue and Groove Sizes

NominalFinished
GreenDry
Thickness (in.)13/411/16
Widths (in.)4, 6, 83-9/16, 5-1/2, 7-3/83-3/8, 5-3/8, 7-1/8

Tongue and Groove Coverage

Tongue and Groove Siding Coverage Table For Dry (Seasoned) Siding

Nominal Width (in.)Dressed Width (in.)Exposed Face Width (in.)Linear Feet FactorBoard Feet Factor
43-3/834.001.33
65-3/852.401.20
87-1/86-3/41.771.19

Tongue and Groove Specifications

The following information is required when specifying tongue and groove panelling products:

Specification Information RequiredSample Specification
Species:
Western Red Cedar
WRCLA Western Red Cedar
Product Pattern and Intended Use:
Siding is used as an exterior cladding to provide both weather protection and architectural style. The designer may choose from Edge V one side (EV1S) WRCLA1, Edge V two sides (EV2S), WRCLA2, or specific pattern number.
Tongue and Groove EV1S – WRCLA1
Size:
Specify the nominal size of the product.
1 x 6″
Grade:
The grade of the product governs its overall quality. Refer to WRCLA specification literature or grading agency rule books for available grades.
Select Knotty
Grading Agency Paragraph:
To ensure that the product meets a written standard, an agency grade paragraph should be referenced.
NLGA para. 204a
Moisture Content:
Specify whether the product is to be green (unseasoned) or kiln-dried.
Kiln-dried
Surface to be exposed:
Specify the application orientation to assist the supplier in shipping the right product for the job.
Sawn face
Quantity:
Express in board feet the quantity required. See WRCLA table for factor to convert square feet of wall area to board feet.
5500 board feet