Wood 12x20 Deck Material List PDF

Foundational Materials

Your 12x20 deck's foundation relies on robust framing and footings to ensure stability and longevity. Here's what you'll need to start your project:

Firstly, determine the number of footings required based on your local building codes and the size and complexity of your deck. Generally, footings should be placed every 6 to 8 feet along the perimeter and supporting interior bearers. You'll need enough concrete and rebar to fill the footing holes (typically 12" in diameter and 36" deep).

Foundation Concrete and Footings

For a 12x20 deck, estimate around 8-12 footings. Multiply the number of footings by 0.1 to determine the cubic yards of concrete needed. For instance, 10 footings would require about 1 cubic yard of concrete.

Rebar is essential for reinforcing your concrete footings. Plan on using one 1/2" or two #4 rebar pieces per footing, cut to the depth of the hole plus an extra 6-12" for proper extension into the deck frame.

Joist and Beamer Frame

The frame of your 12x20 deck consists of joists and beamers, supporting the deck's weight and distributing load from the footings up. Typically, 2x8 or 2x10 pressure-treated lumber is used for joists and beamers (upleaders).

Calculate the number of joists needed based on your desired spacing (16" on center is common). For a 12x20 deck with 16" joist spacing, you'll need 15 joists. Also, count the number of beamers needed – usually three or four, depending on your deck's design and load.

Decking and Rails

The visible surface of your 12x20 deck – the decking and railings – significantly impacts its overall aesthetic. Careful selection of materials and fasteners here can enhance both functionality and curb appeal.

pressures-treated 2x6 or 5/4x6 decking boards are standard choices for the visible walking surface. Consider using board qued radius edge (BQRE) boards for a clean, finished appearance. Calculate the square footage of decking needed, allowing for a 1/2" to 3/4" gap between boards for proper drainage.

Railings and Posts

Railings are necessary for safety and can significantly contribute to your 12x20 deck's visual appeal. Selecting railing materials – such as pressure-treated lumber, composite, or vinyl – depends on your budget, desired maintenance, and aesthetic goals. Count the number of posts needed based on your rail design and post spacing (usually 6' to 8' apart).

Don't forget to account for the balusters or infill materials that connect the posts, providing continuous safety railing. Select balusters based on your chosen railing material and spacing, ensuring they comply with fall protection guidelines and local codes.

Fasteners and Hardware

Selecting the proper fasteners and hardware ensures a secure and durable 12x20 deck. Galvanized or stainless steel connectors, screws, and nails are essential for longevity and rust resistance. Consider using hidden or pocket-hole joinery for a cleaner, more polished look.

Countersunk or flush-mount fasteners help prevent tripping hazards and enhance the overall appearance of your deck. Also, include necessary hardware for assembly, such as hangers, angles, and vague points, tailored to your chosen joinery method and rail system.

After gathering all materials, create a detailed PDF list organized by categories (e.g., concrete & footings, framing, decking, etc.). This list will serve as an invaluable resource throughout your 12x20 deck project, ensuring you stay on track and have the necessary supplies on hand. With careful planning and execution, you'll soon enjoy the fruits of your labor in the form of a beautiful, functional, and safe outdoor living space.