Why Climate Matters for Your Deck
Your deck faces the elements 365 days a year. Rain, snow, UV rays, and temperature swings all take their toll. Choosing the right material for your specific climate is one of the most important decisions you'll make.
Hot & Dry Climates (Southwest, Desert)
Best choices: Cedar, Redwood, Capped Composite
In hot, dry climates, your biggest enemies are UV damage and heat absorption. Natural woods like cedar and redwood handle dry heat well and won't crack from moisture cycling. If you prefer composite, choose a capped variety with UV-resistant technology — standard composites can get uncomfortably hot underfoot.
Avoid: Dark-colored composites (they absorb too much heat) and untreated pine (dries out and splinters quickly).
Humid & Wet Climates (Southeast, Pacific Northwest)
Best choices: PVC/Vinyl, Capped Composite, IPE Hardwood
Moisture is your primary concern. PVC decking is 100% moisture-proof and won't harbor mold or mildew. Capped composites with moisture barriers also perform excellently. If you want natural wood, IPE hardwood is incredibly dense and naturally resists rot.
Avoid: Untreated softwoods and standard composites without moisture barriers — they'll swell, warp, and grow mold.
Cold & Snowy Climates (Northeast, Midwest, Mountain)
Best choices: Pressure-Treated Pine, Capped Composite, Cedar
Freeze-thaw cycles are the challenge here. Water seeps into materials, freezes, expands, and causes cracking. Pressure-treated pine handles this well when properly sealed annually. Capped composites resist moisture penetration. Cedar's natural oils help it weather temperature swings.
Avoid: Any material you can't commit to maintaining — freeze-thaw damage accelerates on neglected decks.
Coastal Climates
Best choices: Stainless steel fasteners (mandatory), IPE, PVC, Capped Composite
Salt air corrodes metal and accelerates wood decay. Always use stainless steel fasteners near the coast — coated screws will fail within a few years. IPE's extreme density makes it resistant to salt damage. PVC is completely impervious to salt.
Avoid: Coated deck screws, untreated metals, and standard pressure-treated lumber without marine-grade treatment.
The Bottom Line
Match your material to your climate, and your deck will last decades. Mismatch them, and you'll be replacing boards within 5 years. Use our Materials Comparison Tool to see how different options stack up for your region.