Composite Decking Sizes

The FAQ on Composite Decking Sizes

No two decking projects are identical. Each build, repair or installation requires materials specific to that job. To get the best products for your project, it’s important to know what composite decking sizes are available and where you can find them.

Use the following FAQ to learn about standard composite decking board dimensions, which boards to use for the various parts of the deck and what manufacturers to turn to for your materials.

What are standard composite decking sizes?

Composite decking size refers to the length and width of the boards used for deck building and repairs. Most manufacturers offer composite decking boards in 12’, 16’ and 20’ lengths. The width varies by brand and style and can range from one to two inches thick and four to six inches wide.

What are standard composite decking shapes?

In addition to standard sizes, composite decking is also offered in standard shapes. The two main shapes are grooved boards and solid boards. Solid boards are also often referred to as square edge boards.

Which boards should I use?

Grooved boards are typically used as the main/inside decking boards. Builders use solid boards for the deck picture frame and stairs. The following guide provides a quick reference for where each type of board should be installed.

Board Shape

Usage

Main Decking

Stairs and picture frame

Skirting

Cladding

Benches & flower boxes

Stair risers

Grooved composite boards

x

Solid composite boards

x

Fascia boards

x

Riser boards

x

Nosing boards

x

Trex solid (square edge) board 1" x 5-1/2"

Trex grooved board 1" x 5-1/2"

Trex Fascia board & Riser board on top

ZURI Nosing board profile

What about fasteners?

The style of board and the project design determine the best type of composite deck screw to use. Visit our composite deck screws page for more information on fastener options.

Where can I find various composite decking sizes?

Some manufacturers produce both grooved and solid boards, and others provide only one type. Some offer a full range of composite decking board dimensions, while others limit their size options. Still others manufacture a variety of options but only distribute to certain areas. We’ve done the research for you and offer the following guide to manufacturer production in Ontario.

Composite Decking Brands

Dimention

Grooved boards

Solid boards

Fascia

Risers

Nosing

AZEK

Length

12’; 16’; 20’

20'

12'

Thickness

1" x 5.5"

0.5" x 11.75"

Clubhouse

Length

12’; 16’; 20’

12'

Thickness

1" x 5.5"

1/2" x 11.94"

Endeck

Length

12’; 16’; 20’

Thickness

Fiberon

Length

12’; 16’; 20’

20' or 16' -Sanctuary

12'

Thickness

0.93"x 5.25"

3/4"x 11.25"

3/4" x 7.25" *

0.925 x 5.25" - Sanctuary

TimberTech

Length

12’; 16’; 20’

20'

12'

Not shipped to Canada

Thickness

0.94" x 5.36"

9/16” x 12”

Trex

Length

12’; 16’; 20’

12'

Thickness

1" x 5.5"

0.75" x 11.25"

0.82" x 5.5"- Select

TREX lumber (Transcend Tropical ONLY)

Length

16'

Thickness

1.3" x 3.4"

Vekadeck

Length

12’; 16’; 20’

Thickness

Trunorth

Length

12’; 16’; 20’

12'

Thickness

15/16" x 5-1/8"

ZURI

Length

12’; 16’; 20’

12'

Thickness

1-1/32"x 5-1/2"

2-3/16" by 3-9/16"

* Sanctuary decking does not have risers

Who can supply these products for my next project?

To find the composite decking sizes you need for your next project, contact the experts at DeckMart Building Supplies. Our knowledgeable staff will guide you through the many custom deck designs available and arrange for prompt, reliable delivery to your jobsite.

“We deliver the product, so you can deliver the project.”