The RoMac Building Supply Whole House Commodity Index fell 0.5% in October to $54,037, down from $54,318 in September. But lower lumber prices don't tell the whole story. OSB climbed for a second consecutive month, fuel costs surged, mortgage rates reached 7.40%, and tariffs continue to put pressure on building costs. Explore the latest commodity price movements, housing market trends, and what builders should watch heading into the final months of 2026.

After 81 years of helping build Central Florida homes, RoMac Building Supply is taking the next step. Learn how RoMac Home Services grew from decades of industry experience and a desire to serve homeowners directly.

The September Whole House Commodity Index was essentially flat at $54,321 from August. But that headline number hides significant volatility underneath. OSB jumped 10.7%, Southern Pine 2x4s climbed 15.7%, while Southern Pine 2x12s fell 10.9% and spruce studs dropped 4.8%. For builders and contractors, the takeaway is clear: a flat Index does not mean flat costs. This month’s report looks at the material swings, softer housing market, rising rates, and other cost pressures sha

Strong vendor partnerships are about more than having the right products available, they're about the knowledge, support and relationships behind them. From monthly Lunch & Learns to hands-on jobsite support, our vendor partners help our team better serve our customers. When our customers benefit, their customers benefit too.