AZEK PVC Decking: Measure Your Project and Order the Right Quantity

Understand AZEK PVC Decking Board Dimensions and Profiles

AZEK PVC decking is available in specific board profiles and lengths, which are crucial for accurate quantity calculations. Most AZEK boards are 1 inch thick by 5-1/2 inches wide. The Vintage Collection also offers a wider 7-1/4 inch board. Standard lengths include 12, 16, and 20 feet. These fixed dimensions dictate how many boards you'll need to cover your project area.

AZEK boards come with either a grooved edge for hidden fasteners or a square edge for face fastening or perimeter boards. Your choice of fastening system will influence the edge type you select, but the overall quantity calculation for the deck surface remains similar, primarily based on surface area coverage.

It is important to note that AZEK PVC decking is a capped polymer board with zero wood content, designed for durability. Its consistent dimensions contribute to straightforward planning and installation.

For additional information on AZEK PVC Decking, visit: https://lumberplus.com/brands/azek

Measure Your Deck Surface Area Accurately

The first step in any material takeoff is to accurately measure the total surface area of your deck. For rectangular or square decks, multiply the length by the width. For more complex shapes, break the area down into simpler geometric sections (rectangles, triangles, circles) and calculate each section's area before summing them.

Always measure in feet and inches, then convert to decimal feet for easier calculation (e.g., 6 inches = 0.5 feet). Double-check all measurements to minimize errors. Consider any cutouts for posts, stairs, or other features, but calculate the total area first, then subtract cutouts if they are significant.

Calculate Board Coverage and Initial Quantity

Once you have your total deck surface area, you can determine how many linear feet of decking you'll need. A standard 5-1/2 inch wide AZEK board covers 0.4583 square feet per linear foot (5.5 inches / 12 inches/foot = 0.4583 feet, so 1 foot length * 0.4583 feet width = 0.4583 sq ft).

To find the total linear feet required, divide your total deck surface area (in square feet) by the coverage per linear foot (0.4583 sq ft/linear ft for 5-1/2 inch boards, or 0.6042 sq ft/linear ft for 7-1/4 inch boards).

Example: For a 200 sq ft deck using 5-1/2 inch boards: 200 sq ft / 0.4583 sq ft/linear ft = approximately 436.4 linear feet.

Account for Board Lengths, Layout, and Waste Factor

Knowing the total linear feet is a start, but you must factor in available board lengths (12, 16, 20 feet) and a waste percentage. Decking layouts, especially those with staggered seams or diagonal patterns, will generate offcuts. Even straight layouts require cuts at the ends and around obstacles.

A typical waste factor for decking projects can range from 5% to 15%, depending on the complexity of the deck shape and the chosen layout. For a simple rectangular deck with straight boards, 5-7% might suffice. For more intricate designs, such as diagonal layouts, picture framing, or numerous cuts, a 10-15% waste factor is more appropriate.

To apply the waste factor, multiply your initial linear footage by (1 + waste percentage). For example, 436.4 linear feet * 1.07 (for 7% waste) = 467 linear feet. Then, divide this total by your preferred board length to get the number of boards. Prioritize using longer boards to minimize seams and cuts where possible.

Consider your layout plan. If you're running boards perpendicular to joists, measure the joist spacing. If you plan a diagonal layout, this will increase waste and typically requires longer boards for the same span.

Worked Example: Calculating AZEK Decking for a 12x18 Foot Deck

Let's calculate the AZEK PVC decking needed for a simple rectangular deck measuring 12 feet by 18 feet, using standard 5-1/2 inch wide boards and a straight layout. We will aim for 16-foot board lengths to minimize cuts and assume a 7% waste factor.

1. **Calculate Total Deck Surface Area:** 12 feet * 18 feet = 216 square feet.

2. **Calculate Linear Feet Required (initial):** Using 5-1/2 inch boards (0.4583 sq ft/linear ft), 216 sq ft / 0.4583 sq ft/linear ft = 471.3 linear feet (approximately).

3. **Apply Waste Factor:** With a 7% waste factor, 471.3 linear feet * 1.07 = 504.29 linear feet.

4. **Determine Number of Boards:** We'll use 16-foot boards. 504.29 linear feet / 16 feet/board = 31.52 boards. Since you cannot purchase partial boards, round up to 32 boards.

If using 12-foot fascia boards, 60 linear feet / 12 feet/board = 5 boards. Always add a small waste factor for fascia, perhaps 5-10%, especially if mitered corners are planned. So, 5 boards * 1.05 = 5.25, rounded up to 6 boards.

For this hypothetical 12x18 foot deck, you would need to order 32 AZEK PVC decking boards (5-1/2 inch x 16 feet) and 6 AZEK fascia boards (12 feet length).

Don't Forget Fascia, Trim, and Fasteners

Beyond the main decking surface, remember to calculate materials for fascia boards, trim, and fasteners. AZEK offers matching fascia boards to complete the look of your deck. Measure the total perimeter of your deck where fascia will be applied. Divide this linear footage by the available fascia board lengths (typically 12 or 16 feet) and add a waste factor.

For fasteners, refer to the AZEK installation guidelines for recommended types and quantities. The number of fasteners will depend on your chosen system, board width, and joist spacing. It's usually best to purchase fasteners in bulk packs based on square footage coverage recommendations.

Explore complementary products for your deck project: Decking, Hardwood Decking, Ipe Hardwood Decking, Composite Decking, PVC Decking.

Before you order

• Have you measured the total length and width of your deck surface accurately?
• For irregular shapes, have you broken the area into smaller, measurable sections?
• Have you decided on the AZEK PVC decking collection (Vintage, Landmark, Harvest) and board width (5-1/2" or 7-1/4" for Vintage)?
• Have you chosen between grooved (hidden fastener) or square edge boards?
• What board lengths (12, 16, 20 ft) will best minimize cuts and waste for your layout?
• Have you determined your decking layout (straight, diagonal, picture frame)?
• What waste factor (5-15%) is appropriate for your project's complexity?
• Have you calculated the total linear footage needed, including the waste factor?
• Have you calculated the linear footage for all fascia and trim boards?
• Have you accounted for the necessary quantity of compatible fasteners (hidden clips or face screws)?
• Are there any special considerations like stairs, railings, or built-in features that require additional material calculations?

Confirm installation details, approved uses and warranty terms in the current instructions for the exact product and profile. Your installer should verify the substrate, structure and applicable project requirements.

Questions to help you decide

Keep planning your project