1. What is the Trex Decking Calculator?

The Trex Decking Calculator helps you determine how many Trex composite decking boards you'll need for your deck project based on your deck dimensions and joist spacing.

2. How Does the Calculator Work?

The calculator uses the Trex decking formula:

Where:

• \( length \) — Length of the deck area in feet
• \( joist spacing \) — Distance between joists in feet
• \( width \) — Width of the deck area in feet

Explanation: The formula calculates the number of decking boards needed by accounting for both the deck dimensions and the required support structure.

3. Importance of Accurate Calculation

Details: Proper calculation ensures you purchase the right amount of materials, minimizing waste and preventing project delays due to insufficient materials.

4. Using the Calculator

Tips: Measure your deck area carefully. Standard joist spacing for Trex decking is 16 inches on center (1.33 feet). Always round up to the nearest whole board when purchasing.

5. Frequently Asked Questions (FAQ)

Q1: What's the standard joist spacing for Trex decking?
A: Trex recommends 16" on center spacing for most applications, though some products allow up to 24" spacing.

Q2: Should I add extra boards for waste?
A: It's recommended to add 10-15% extra to account for cutting waste and mistakes.

Q3: How wide are Trex deck boards?
A: Standard Trex deck boards are 5.5" wide (actual width 5-1/2"), but check your specific product as widths may vary.

Q4: Does this calculator account for pattern layouts?
A: No, this calculates for straight runs only. Diagonal or complex patterns will require more material.

Q5: Can I use this for other composite decking brands?
A: While the calculation method is similar, always check the specific manufacturer's recommendations for joist spacing.