Square One Construction: Reliable Privacy Fence Installation Serving Helena, MT 59602
3790 N Montana Ave, Helena, MT 59602
Core Services
- Deck construction
- Deck repair
- Building additions
- Deck replacement
Local Business Description
Square One Construction, located in Helena, MT, tackles the common local issue of sagging fences and deck posts caused by the heavy clay soil and freeze-thaw cycles prevalent in the Helena Valley area. Whether you live near the historic Last Chance Gulch or in the North Hills neighborhood, shifting ground can compromise the stability of your property's boundaries and outdoor living spaces. As a general contractor, Square One offers complete solutions, from building new additions that tie into existing structures without sinking, to deck construction, repair, and replacement. They ensure new footings are set below the frost line, preventing future movement. For homeowners around Mount Helena or the Helena College campus, Square One provides dependable repairs that anchor your fence or gate firmly back into the ground, saving you from constant seasonal adjustments.
Common Questions
Why are my deck posts leaning after a winter in Helena?
Helena experiences heavy clay soils and significant freeze-thaw cycles. When moisture gets into the ground around a post, it freezes and expands, pushing the post upward (frost heave) or sideways. Over time, this movement causes the post to lean or the deck to become unlevel. If your deck is showing these signs, it's likely the footings were not set deep enough below the frost line. Square One Construction addresses this by excavating to the proper depth and using concrete footings that are designed to resist the shifting soil common in local neighborhoods like the West Side or near Spring Meadow Lake.
My fence gate is dragging on the ground in summer but has a gap in winter. Is that normal?
Yes, this is a very common effect of soil movement in the Helena area. As the ground heaves in winter, the gate post can rise, creating a gap at the bottom. When the ground settles in summer, the post drops, causing the gate to drag. This isn't normal for a well-built fence. The solution is to ensure the gate post is anchored on a solid concrete base that extends below the frost line. Square One Construction can assess your gate post's foundation and either re-set it properly or, in severe cases, replace the post and section of fencing to provide a stable, year-round fit that doesn't change with the seasons.
Do I need to replace my entire deck if the support posts are rotting or shifting?
Not necessarily. If the rot or movement is localized to a few posts, a targeted repair or replacement of just those posts and their footings is often possible. Square One Construction will inspect the ledger board (where the deck attaches to your house), the joists, and the remaining posts. If the rest of the structure is sound, we can cut out the compromised posts, dig new footings below the frost line, and install new pressure-treated or ground-contact-rated posts. This is a common repair for older homes in Helena near the downtown area or on the South Hills. If the damage is widespread or the deck is very old, full replacement might be more cost-effective in the long run.
Business Location & Hours
| Mon: | 8:00 AM - 5:00 PM |
| Tue: | 8:00 AM - 5:00 PM |
| Wed: | 8:00 AM - 5:00 PM |
| Thu: | 8:00 AM - 5:00 PM |
| Fri: | 8:00 AM - 5:00 PM |
| Sat: | Closed |
| Sun: | Closed |



























