Tongue and Groove Siding

1. T&G Pattern: V2E - 2 Beveled Edges (one face use)

2. T&G Pattern: V4E - 4 Beveled Edges (reversible)

3. T&G Pattern: V2E Center V - 2 Beveled Edges with Center V Groove

4. T&G Pattern: Flush Joint (cedar) / Butt Joint (redwood) - sometimes erroneously called Center Match

 The Tongue & Groove pattern "shadowed line" profile is similar to the effect that is achieved with the SHIPLAP "Nickel Gap" profile except that the line is usually 1/8" verses the 3/8" and creates a finer shadow line. When installed a "fine line" effect is created.

Note the thin blue line creating a 1/8 inch "shadow line" between the boards when installed. 

The Western Wood Products Association (WWPA) and California Redwood Association (CRA) diagrams below are industry pattern standards and display actual numbers but they are guidelines not milling requirements. Over the years milled dimensions have shrunk (and continue to do so). Once you have calculated your project's SQUARE FOOT area you need to get the true dimensions - especially the exposure - of the wood siding boards you are buying. 

(1) WWPA T&G SIDING 106 S2S Drop Edge+Square Edge

(2) WWPA T&G SIDING 116 CENTER V S2S Bevel Edge

(3) WWPA T&G SIDING CENTER MATCH Butt Joint 1/4" Tongue

(4) WWPA T&G SIDING CENTER MATCH Butt Joint 3/8" Tongue

(5) WWPA T&G SIDING WWPA CENTER MATCH Smooth Butt Joint 1/4" TNG

(6) WWPA T&G SIDING CENTER MATCH Smooth CM Butt Joint 3/8" TNG

(7) WWPA T&G PANELING WP-2 Molded Edge+V Edge S2S CENTER MATCH

(8) WWPA T&G SIDING WP-4 V2E or V4E.gif

(9) WWPA T&G PANELING WP-6 Rounded Edge

END-MATCHED Tongue and Groove (below) is NOT a siding standard. It is a special option of interior paneling that makes installation easier when spanning wall studs or ceiling beams. The T&G Ends can be beveled or flush joint.

(1) REDWOOD T&G Patterns 204-206 5-8-inch V1S-S2S 3-32-V

(2) REDWOOD T&G Patterns 709-713 1-inch V1S-S2S 1-4-V

(3) REDWOOD T&G Patterns 707-716 1-inch V1S-S2S 3-32-V

(4) REDWOOD T&G Patterns 709-713R 1-inch V2S-S1S-Saw-1S 1-4-V

(5) REDWOOD T&G Patterns 707-716R 1-inch V2S-S1S-Saw-1S 3-32-V

(6) REDWOOD T&G Patterns 732-734R 1-inch V2S-S1S-Saw-1S 1-4-V

(7) REDWOOD T&G Patterns 726-728R 1-inch V2S-S1S-Saw-1S 1-8-V

(8) REDWOOD T&G Patterns 632-634 1-inch S2S-CM

(9) REDWOOD T&G Patterns 632-634EE 1-inch EE S2S-CM

(10) REDWOOD T&G Patterns 616-617 1-inch V&CV-S2S 1-4-V

(11) REDWOOD T&G Pattern 606 1-inch S2S

(12) REDWOOD T&G Patterns 16-18 1-inch S2S-CM paneling