5 Things to Know Before Building a Deck in Texas

Building a deck in Texas isn't the same as building one in Oregon or Michigan. The extreme heat, intense UV exposure, and dramatic temperature swings demand specific considerations that many general guides overlook.

1. Material selection matters more here than anywhere. Standard pressure-treated lumber will warp and crack within 2-3 years under Texas sun. Even some composite brands struggle with heat expansion. Choose products specifically engineered for extreme climates — look for UV-stabilized capping and heat-deflecting technology.

2. Joist spacing needs adjustment for heat. In cooler climates, 16" on center is standard for most composite boards. In Texas, we recommend checking with your board manufacturer — some products perform better at 12" spacing to account for thermal expansion under extreme heat.

3. Expansion gaps are critical. Leave adequate gaps between board ends (typically 5-6mm when installing below 75°F). Composite boards expand in heat, and insufficient gapping leads to buckling. Your installation guide should include a gapping chart based on installation temperature.

4. Consider shade and orientation. A west-facing deck takes the full force of afternoon Texas sun. If your deck faces west, consider adding a pergola or shade structure, and opt for lighter board colors — they stay measurably cooler than dark boards.

5. Substructure material matters. Aluminium joists won't rot, warp, or attract termites — all common problems with timber joists in Texas. The upfront premium pays for itself in longevity and structural integrity, especially for elevated decks.