Cosman Construction - Boulder's Best Fencing Company

Given Boulder's high altitude and intense sun, look for signs like splintering wood, loose or corroded fasteners, soft or rotting boards near the ground, and a spongy feel underfoot. Boulder's freeze-thaw cycles can also cause frost heave that shifts deck footings, leading to uneven railings or a tilted structure. If your deck is over 15 years old and showing multiple of these signs, a full replacement is often more cost-effective than repeated repairs.

Boulder receives over 300 sunny days per year, and the intense UV radiation breaks down the lignin in wood, causing fences to gray, crack, and lose structural integrity within a few years. The solution is to use pressure-treated lumber with a high-quality UV-resistant stain applied immediately after installation. For maximum longevity, Cosman Construction also recommends using a semi-transparent stain and sealing the top and end grains of the pickets to prevent moisture ingress during winter snowpack.

Yes, localized rot can often be repaired without a full replacement. If the rot is confined to a few boards, joists, or a post base, Cosman Construction can cut out the damaged areas, install new lumber, and reinforce connections. However, if the rot has spread into multiple joists, the ledger board, or is caused by a damaged foundation, a deck replacement is the safer and more durable option for Boulder homeowners.