Build your home from the ground up

If you need a deck or pergola in Helena that holds up to freeze-thaw cycles, UV exposure, and the weight of a Montana winter, the finished result depends entirely on material selection, proper footing depth, and structural framing designed for local conditions. Pronghorn Contracting LLC builds custom decks and pergolas across the Helena area using pressure-treated lumber, composite decking, and fastening systems rated for cold-climate performance. The outcome is an outdoor structure that stays level, resists moisture penetration, and doesn't require constant maintenance to remain functional.

Helena homeowners who invest in a well-built deck or pergola gain usable outdoor space that transitions naturally between seasons. Unlike prefab structures that shift and settle, custom-built decks are footed below the frost line—typically 36 to 48 inches in Montana—so frost heave doesn't crack the frame or compromise the ledger board connection to the house. Decking boards are gapped correctly for drainage, and pergola beams are sized to carry snow load without deflection.

Whether you're planning a wraparound deck near the South Hills or a covered pergola for a backyard in the east Helena corridor, the process starts with site evaluation and a design that fits your property's grade, drainage, and sun exposure.