Building an outdoor deck or fence in Twin Falls? Magic Valley's climate — intense summer UV, low humidity, and cold winters — is harder on lumber than most of Idaho. Here's what we've seen perform best over 37 years of selling to local contractors and homeowners.

Western Red Cedar: The Gold Standard

Cedar is naturally resistant to rot, insects, and moisture. A 5/4x6 cedar decking board at 16 feet handles the UV better than most alternatives. The trade-off is cost: cedar runs about $22 per 16-foot board. For a standard 12x16 deck, budget around $800–$1,000 for decking material alone.

**Twin Falls tip:** Cedar shrinks as it dries. Install boards with a 1/8" gap — by summer, they'll be perfect.

Pressure-Treated Pine: Best Value

For structural framing — posts, beams, joists — ground-contact pressure-treated lumber (rated UC4B or higher) is mandatory in Magic Valley's wet soil conditions. Our 4x4x8 posts at $12.99 are rated for ground contact and ACQ-compatible.

**Twin Falls tip:** ACQ-treated lumber corrodes standard fasteners. Use only hot-dipped galvanized or stainless-steel hardware, or our star-drive coated deck screws.

Composite: Low Maintenance, Higher Upfront

We special-order Trex and TimberTech composite decking. No staining, no splinters. Typically $4–$6 per linear foot more than cedar upfront, but lasts 25+ years with minimal maintenance. Popular with retirees and rental property owners in Jerome and Kimberly.

What to Avoid

Standard "whitewood" dimensional lumber from the big-box stores is not rated for exterior use and will twist, check, and rot within a season outdoors in our climate. If it doesn't say "pressure-treated" or "cedar," keep it inside.

Come see us at 2180 Addison Ave W — we'll pull samples and help you estimate the full materials list for your project.