Below-Grade Moisture Control
Stop active water intrusion at its source, walls, joints, and slab sealed against snowmelt and groundwater.
Where Waterproofing Fails
Most waterproofing failures trace back to one decision made before any material was applied.
Applying a membrane over an active crack without pressure-injecting it first traps moisture inside the concrete matrix and delays the failure rather than stopping it.
Polyurethane is injected under pressure to fill the void and bond to the concrete before any surface membrane is applied.
The wall-floor joint is the most common water entry point in below-grade structures, yet surface coatings applied over it fail under hydrostatic pressure within one snowmelt season.
The joint is routed out and resealed with a flexible, waterproof compound rated specifically for hydrostatic pressure conditions.
Pipe and conduit openings through the slab or walls are often left unsealed, giving groundwater a direct path into the structure regardless of how well the walls are treated.
Each pipe and conduit opening is packed and sealed individually before the broader membrane or coating work begins.
Sealing walls without managing hydrostatic pressure at the perimeter means water continues to build against the structure and eventually finds a new path through.
A perimeter drain and gravel drainage bed are included in the waterproofing scope to relieve pressure before it reaches the concrete face.
Scope of Work
A full waterproofing scope addresses every surface and entry point, not just the visible wet area.
Moisture meter readings and visual checks map every wet area and distinguish exterior groundwater pressure from interior seepage before any material is applied.
Cracks in the concrete matrix are pressure-injected with polyurethane to fill the void completely and bond to the surrounding substrate.
The joint is routed out and resealed with a flexible compound rated for hydrostatic pressure, the most common active entry point in below-grade structures.
A rubberized waterproof membrane is applied to wall faces after crack and joint work is complete, providing a continuous barrier against groundwater.
Where the slab shows seepage, an epoxy coating is applied after the substrate is dried to the required moisture content for adhesion.
A perimeter drain system and sump pit relieve hydrostatic pressure at the foundation perimeter before it can force water through the structure.
Each conduit opening packed and sealed individually.
Mineral deposits removed before membrane or coating work.
Membrane applied to the outside wall face where re-excavation is feasible.
Pump sized and positioned to handle seasonal groundwater rise.
Stop the Source
Treating the symptom without finding the source is why many waterproofing repairs fail within one Montana snowmelt season.
A moisture meter reading and visual inspection map every wet area before any material is applied. The key distinction is whether water is entering through exterior groundwater pressure, through a crack in the concrete matrix, or through a failed joint or penetration seal. Each source requires a different fix. Applying a rubberized membrane over an active crack without injecting it first traps moisture and delays the failure rather than stopping it.
Cracks are sealed with polyurethane injection under pressure, which fills the void and bonds to the concrete. Wall-floor joints, the most common entry point in below-grade structures, are routed out and resealed with a flexible, waterproof compound rated for hydrostatic pressure. Pipe and conduit penetrations are packed and sealed individually. Where the slab shows seepage, an epoxy coating is applied after the substrate is prepared and dried to the required moisture content.
Exterior waterproofing is the most durable solution when re-excavation is feasible: a rubberized membrane applied to the outside face of the wall, combined with a perimeter drain and gravel drainage bed, removes hydrostatic pressure before it reaches the concrete. Where re-excavation is not practical, interior injection and membrane work address the symptoms effectively. Montana’s high-country and valley properties can sit above seasonal groundwater that rises after heavy precipitation, so drainage design is part of every waterproofing scope, not an optional add-on.
Why Choose Us
Every quote covers the full scope, not just the visible wet spot.
Site access, drainage grading, soil bearing, and water table are flagged before the enquiry reaches an installer.
Excavation, sealing, drainage, and commissioning are quoted separately so you see exactly what each phase costs.
Snowmelt season timing and seasonal groundwater rise are part of the scope review, not discovered on site.
Enquiries are scoped for Montana’s freeze-thaw and high-water-table conditions.
Equipment access routes and drainage grading problems are identified in the scope review, before they become change orders.
The Process
01
Tell us the parcel, the shelter type, and the symptoms you are seeing, water stains, damp walls, or wet floor areas.
02
We review site access, drainage grading, soil conditions, and water table before moving the enquiry to a quote.
03
The site visit inspects the structure, identifies every entry point, and the quote covers inspection, sealing, and drainage as separate line items.
Pricing Estimates
| Job | Typical cost |
|---|---|
| Sealant and crack sealing | $2,000-$6,000 |
| Interior waterproofing | $8,000-$20,000 |
| Full exterior waterproofing system | $25,000-$40,000 |
Tell us the parcel, the shelter type, and what you are seeing. We review the site conditions and move your enquiry to a quote covering inspection, sealing, and drainage phase by phase.