How Much Decking Do I Need for My Project?

March 6, 2026

Planning to build a new deck is an exciting way to upgrade your outdoor living space. One of the most common questions homeowners and contractors ask before starting a project is: how much decking do I actually need?


Accurately estimating your decking materials helps prevent delays, reduce waste, and keep your project within budget. At Deck Supply of Nashville, the team works with homeowners and contractors throughout Middle Tennessee to help them determine the right materials for every deck project.



Below is a simple guide to help you calculate how much decking you need.

Step 1: Measure the Size of Your Deck

The first step in estimating decking materials is measuring the total square footage of the deck you plan to build.


To calculate square footage:

Length x Width = Total Square Feet

For example:

  • 12 ft x 16 ft deck = 192 square feet
  • 14 ft x 20 ft deck = 280 square feet


This number gives you the total area that needs to be covered with decking boards.

If your deck includes multiple sections or levels, measure each area separately and add the totals together.


Step 2: Understand Deck Board Coverage

Deck boards come in different widths depending on the material you choose, such as composite, PVC, or wood decking.


The most common deck board width is 5.5 inches. After accounting for spacing between boards, this typically covers about 6 square feet per board for every 12 feet of length.


However, coverage varies based on board width and spacing. Because of this, many suppliers calculate decking needs using square footage instead of board count.


Working with a local decking supplier can help ensure your estimate matches the specific materials you plan to use.


Step 3: Add Extra Material for Waste

Most deck projects require additional material to account for cutting, layout adjustments, and potential mistakes during installation.


A good rule is to add:

10 to 15 percent extra decking

Example:

  • Deck size: 200 square feet
  • Add 10 percent waste: 20 square feet

Total decking needed: 220 square feet


This buffer helps ensure you do not run short on materials during construction.


Step 4: Consider Deck Design Features

Your deck design can impact how much decking material you need.


Features that may increase material requirements include:

  • Diagonal deck board layouts
  • Picture frame borders
  • Built in seating or benches
  • Multi level decks
  • Custom patterns


These design elements often require additional cutting and waste, which means ordering slightly more material.

If your deck includes custom design features, a professional supplier can help refine your material estimate.


Step 5: Do Not Forget Other Deck Materials

Deck boards are only one part of the project. A complete deck requires several additional materials, including:

  • Framing lumber
  • Deck screws or hidden fasteners
  • Joist hangers and hardware
  • Deck railing systems
  • Deck lighting
  • Deck drainage systems


Choosing high quality materials for every part of the structure helps ensure your deck remains safe and durable for years.

Deck Supply of Nashville offers a wide selection of decking boards, railing systems, fasteners, and accessories to help complete your project from start to finish.


Choosing the Right Decking Materials

The type of decking material you choose also affects how much material you need and how your deck performs over time.


Common options include:

Composite Decking
Composite boards are made from a combination of wood fibers and recycled plastics. They are durable, low maintenance, and resistant to moisture and rot.

PVC Decking
PVC decking is lightweight, highly resistant to moisture, and a great option for areas with heavy rain or humidity.

Pressure Treated Wood Decking
Traditional wood decking is often more affordable upfront but requires regular staining and maintenance.


The team at Deck Supply of Nashville helps customers compare different materials so they can choose the best option for their project and budget.


Get Help Estimating Your Deck Materials

Estimating decking materials can sometimes be tricky, especially for larger or more complex deck designs. Working with a knowledgeable supplier can help ensure your project runs smoothly.


At Deck Supply of Nashville, the experienced team helps homeowners and contractors calculate the right amount of decking, recommend materials, and provide guidance for outdoor living projects.


Whether you are building a small backyard deck or a large outdoor entertainment space, having the right materials from the start makes the process easier and more efficient.


Final Thoughts

Determining how much decking you need starts with measuring your deck area, understanding board coverage, and adding extra material for waste. Considering design features and choosing the right materials will also help ensure your deck looks great and lasts for years.


If you are planning a deck project in Middle Tennessee, visiting Deck Supply of Nashville can help you find the materials, guidance, and expertise needed to bring your outdoor space to life.

An empty screened in porch with a wooden deck and white railing.

Choosing the Right Decking Material for Your Nashville Home

June 2, 2025
Planning to build or upgrade a deck? Choosing the right decking material is one of the most important decisions you'll make—and it can impact everything from aesthetics and maintenance to long-term durability and budget. With so many options available today, Nashville homeowners have access to materials that offer not only beauty but also performance and low maintenance. Wood Decking: Natural Beauty with Classic Appeal Wood decking has long been a favorite for its timeless, natural look. Pressure-treated pine is the most common choice due to its affordability and availability. For a more premium option, cedar and redwood provide rich color, resistance to rot, and a luxurious finish. However, wood decks require regular maintenance to prevent weathering and prolong their lifespan. Staining, sealing, and occasional board replacement are part of keeping a wood deck looking its best. Composite Decking: Low-Maintenance and Long-Lasting Composite decking has become increasingly popular in Nashville thanks to its minimal upkeep and realistic wood-grain appearance. Made from recycled wood fibers and plastic, composite boards resist warping, fading, cracking, and insect damage. Top brands like Trex, TimberTech, and Sylvanix offer composite products in a wide variety of colors and finishes, making it easy to match your home’s style. This option is ideal for homeowners who want a durable, low-maintenance deck that looks great for years with minimal effort. PVC Decking: Maximum Durability and Moisture Resistance For those looking for the ultimate in weather resistance, PVC decking is a fantastic choice. Made entirely from plastic, PVC boards like those from AZEK resist water absorption, mold, and mildew—perfect for Nashville’s humid climate or homes near water. PVC decking is lightweight, splinter-free, and extremely easy to clean. While it may cost more upfront, its long-term durability and virtually maintenance-free performance make it a smart investment. Visit Our Nashville Showroom for Hands-On Help At Deck Supply of Nashville, we carry a wide selection of composite, wood, and PVC decking materials from the most trusted brands in the industry. Our experienced team is here to walk you through your options and help you find the perfect product based on your needs, style preferences, and budget.  Visit our showroom to see the materials up close, get expert advice, and start planning your dream deck today.
A wooden deck with a couch and chairs on it.

5 Reasons to Shop Local for Decking Materials in Nashville

June 2, 2025
Get Materials for your Nashville Deck at Deck Supply When starting a decking project, one of the first decisions you'll make is where to purchase your materials. While big box stores might seem convenient, local decking supply experts offer personalized service, better product knowledge, and faster turnaround times that national chains simply can’t match. 1. Specialized Selection of Outdoor Living Products Unlike general hardware stores, Deck Supply of Nashville focuses solely on decking materials and outdoor living products. That means you’ll find a better selection of composite, PVC, and wood decking, along with deck railings, drainage systems, lighting, fasteners, and screened-in porch materials—all under one roof. Our team stays up to date on the latest product innovations, styles, and industry trends so you get the best materials for your specific project. 2. Personalized Support from Local Decking Experts Our knowledgeable staff lives and works in the Nashville community, and we understand the unique needs of Middle Tennessee’s climate, building codes, and outdoor lifestyles. Whether you’re a first-time DIYer or a professional contractor, we provide one-on-one support to help you select the right products and avoid costly mistakes. We also offer recommendations for local contractors, giving you access to a vetted network of skilled deck builders. 3. In-Stock Materials and Quick Delivery Waiting weeks for materials to arrive can delay your entire project. At Deck Supply of Nashville, we keep most decking materials in stock and ready for same-day pickup or delivery within 1 to 2 days. Special orders? No problem—we’ll get them to you quickly and keep your build on schedule. 4. Competitive Pricing and Honest Guidance Shopping local doesn’t mean paying more. In fact, many of our products are priced better than what you’ll find at big box retailers—and we never upsell you on things you don’t need. Our goal is to help you build a quality deck that fits your budget without sacrificing durability or style. 5. Investing in the Local Nashville Community When you shop with Deck Supply of Nashville, you’re supporting a locally owned business that’s committed to building relationships and strengthening our community. We take pride in being part of your project and delivering a customer experience that national chains simply can’t match. Ready to Get Started on Your Deck? Stop by our Nashville showroom today to explore materials, speak with a decking expert, and discover how shopping local can make your next outdoor living project easier, faster, and more rewarding.