

If your deck is rotting, sagging, or simply feels unsafe don’t wait. Alliance Deck Builders of Montana specializes in expert deck repair and reinforcement services designed to meet building codes and extend your deck’s life. From cracked boards to failing support posts, we restore structural integrity across every inch. Serving homes from Billings to Whitefish.
No two repairs are the same but most follow the same pattern: we inspect, identify, stabilize, and rebuild. Common repairs include replacing cracked deck boards, reinforcing joists, securing posts, tightening ledger connections, and updating railing systems to current safety codes. If your deck is salvageable, we’ll save it. If it needs partial rebuilds, we’ll make those transitions seamless. Either way, the result is a safer, longer-lasting deck.
Replace damaged decking, stairs, and railings
Reinforce frames, joists, and footings as needed
Add flashing and hardware to prevent future rot

You don’t always need a full tear-out. In many cases, we can preserve your existing frame or decking with strategic repairs and reinforcements. We offer clear, upfront estimates and walk you through exactly what needs fixing—no surprises, no pressure. Whether it’s a loose stair tread in Missoula or a leaning railing in Helena, we help Montana homeowners save money while making their outdoor spaces safe again.

Snow buildup, freeze-thaw cycles, wind, and moisture wreak havoc on Montana decks. These conditions can cause hidden rot, frost heave, rusted fasteners, and weakened connections. Our repair process begins with identifying which forces are at play, then choosing the best method to counter them—whether that means adding blocking, replacing posts, or improving drainage. We use treated lumber, galvanized hardware, and techniques designed to last through the next ten winters.
From your first call to final walkthrough, our team handles everything professionally and transparently. We schedule a site visit, perform a full deck assessment, and provide a line-item quote for repairs. Once approved, our licensed crews arrive on time, remove unsafe sections, reinforce as needed, and clean up thoroughly. You’ll have a safe deck, rebuilt to current code and peace of mind that your family can use it again safely.

Safety-Focused Repairs: We fix critical failures and bring decks up to code.
Structural Expertise: Licensed builders trained in framing and load-bearing corrections.
Affordable Solutions: We repair what’s salvageable to reduce full rebuild costs.
Fast Turnarounds: Most repairs completed in days, not weeks.
Local Knowledge: We know what damages decks in Montana and how to prevent it.
Don't worry, we can help!
You can’t fix what you can’t see. Our repairs are rooted in detailed inspections that go beyond surface damage. We crawl under decks, remove boards when necessary, and check everything fasteners, supports, brackets, and moisture points. This lets us repair the cause, not just the symptoms. Montana weather is tough, but your deck doesn’t have to be.
Full safety inspections included with every quote
Upgrades available for aging or outdated builds
Code-compliant corrections and retrofits available
Whether your deck is all cedar, pressure-treated wood, or a composite-wood hybrid, our team knows how to restore it. We match materials for clean transitions, replace only what’s necessary, and reinforce structural elements to ensure long-term safety. Many older decks mix wood framing with composite boards—we know which products play well together and which upgrades make sense in Montana’s demanding conditions.
Not sure what’s wrong or whether your deck is worth saving? Here’s what Montana homeowners ask most before scheduling repairs:
Look for soft boards, loose railings, wobbling stairs, or leaning posts. We inspect and confirm structural safety.
Yes. We can often fix specific sections without full replacement if the frame and supports are sound.
Absolutely. All repairs meet Montana code and safety standards. We’ll bring your deck up to compliance.
Sometimes. We handle permitting when required based on your location and the scope of work.

We design and build custom decks tailored to your home, lifestyle, and outdoor space—built for comfort, code, and long-term value.

Durable, low-maintenance decking in brands like Trex and TimberTech. We install with expert framing and clean finishes.

Traditional wood decks built from cedar or pressure-treated lumber, sealed for longevity and built with care.

We replace rotted joists, tighten loose rails, and restore sagging stairs—bringing your deck back to safe, usable shape.

We clean, sand, and seal old decks to restore natural color and extend the life of your outdoor space.

Tiered decks add dimension and function. We build secure, attractive multi-level systems with unified stairs and rails.

We extend existing decks or replace worn boards with modern composite or sealed wood—saving the foundation when possible.

From pergola-style shade to full patio roofs, we protect your deck space from rain, sun, and snow with stylish coverage.

Enjoy fresh air without the bugs. We build screened rooms and glass-walled sunrooms for relaxing in all weather.

We build grilling areas, outdoor sinks, and kitchen setups into decks—complete with fire-safe materials and smart layout.

Add architectural charm and functional shade with custom pergolas, gazebos, or arbors—built freestanding or integrated.

Slip-resistant, water-safe decks designed to wrap hot tubs or pool edges with beauty and durability.

We construct code-compliant outbuildings including garages, workshops, and storage sheds with matching exterior finishes.

We fabricate and install deck railings and stairs to match your design goals and meet local safety codes.

From rooftop lounges to restaurant patios, we build commercial-grade decks that handle heavy use and meet ADA compliance.

Innovation
Fresh, creative solutions.

Integrity
Honesty and transparency.

Excellence
Top-notch services.
Whether you're looking to add a sun-soaked patio, rebuild a storm-damaged deck, or design a multi-level masterpiece, we’re ready to help. Alliance Deck Builders of Montana brings expertise, materials, and trust to every job no matter the size. Contact us today to schedule your free consultation and let’s bring your outdoor vision to life.

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