How We Build
Below the Line
Four phases. Thirty years of trade discipline. Every system is engineered around drainage first, built to structural tolerances, and finished so the yard looks like nothing happened.
From first site visit to final walk-through
Site Evaluation
Everything starts with the actual ground
We don't spec from satellite imagery. Every LOWLINE engagement begins with a physical site visit where we evaluate drainage patterns, soil composition, utility locations, and structural feasibility. This is the phase where most installs get saved from failure — because drainage problems caught before dig day cost zero. Problems found after backfill cost everything.
- Drainage pattern mapping — where water flows, where it pools, and where it wants to go
- Soil composition analysis — Nashville clay vs. Omaha loam require different drainage strategies
- Utility location and clearance verification — gas, water, electric, fiber, septic
- Structural feasibility assessment — load bearing, frost line depth, bedrock proximity
- Surface finish evaluation — existing sod quality, hardscape material, grade continuity
Design Integration
The system is designed around the property — not added to it
This is where most projects diverge from a standard install. We engineer the drainage plan first, then design the system geometry around it. Material specification happens after we know what the ground demands, not before. Access design considers how the system will be maintained in year five, not just how it looks on day one.
- Drainage engineering plan — perforated drainage field, French drain integration, discharge routing
- Structural material specification — galvanized steel, polymer, concrete — matched to soil and load conditions
- Access and maintenance design — cleanout ports, inspection hatches, service routing
- Surface finish specification — sod blend match, paver edge detail, grade transition
- Permitting and HOA documentation — engineered drawings, setback compliance, neighborhood aesthetic review
Subsurface Construction
Precision excavation, structural assembly, and drainage infrastructure
The dig is where theory meets the ground. We excavate to engineered tolerances — not approximate. Structural components are assembled in the pit, not above it and dropped in. Drainage infrastructure goes in before backfill, not after. Every connection is accessible. Every surface that will be buried is coated or protected against the soil it's entering.
- Precision excavation to engineered tolerances — ±1 inch grade control on critical surfaces
- Structural assembly in-situ — components fitted and welded in the excavation, not prefab-dropped
- Drainage infrastructure installation — perforated pipe field, gravel bed, discharge routing to daylight or storm system
- Vapor barrier and protective coating application — all buried surfaces sealed against soil chemistry
- Compaction-controlled backfill in lifts — engineered soil replacement, not just filling the hole
Final Finish
The yard is returned to its natural state. The system disappears.
This is the phase that separates a LOWLINE install from a standard contractor job. The sod is replaced with the same blend, cut to the same thickness, and integrated at the seam so the line vanishes within two growing seasons. Hardscape edges are re-cut and re-set with precision. The grade flows naturally across the system. From ten feet away, you shouldn't know where the property ends and the installation begins.
- Sod replacement with matched blend — same grass species, same cut thickness, same soil prep
- Seam integration and grow-in management — the transition line disappears within one growing season
- Hardscape edge restoration — paver re-cut, stone re-set, mortar or sand joint reinstatement
- Grade verification and surface flow testing — water must sheet across the site naturally
- Final quality inspection — structural integrity, drainage function, surface finish, documentation handoff
What separates a LOWLINE install
These aren't marketing points. They're the technical disciplines that determine whether a subsurface system lasts 5 years or 25. Every one traces back to the trade work that started in 1996.
Every LOWLINE system is engineered around water management first. Nashville's clay-heavy soils hold water like a bathtub. Omaha's freeze-thaw cycle puts hydrostatic pressure on every buried surface. We design drainage fields, discharge routing, and soil amendment strategies specific to the property's hydrology — not from a template.
For in-ground trampolines, a perforated drainage field beneath the pit prevents water accumulation that would degrade the frame and mat. For storm shelters, positive drainage away from the entrance hatch is critical. For wellness systems, cold plunge basins require dedicated discharge to prevent groundwater contamination.
What to expect, and when
Most LOWLINE projects move from site evaluation to final walk-through in 4–8 weeks. Smaller installs (single in-ground trampoline) can complete faster. Complex builds (storm shelter + wellness system) may extend. Here's the typical sequence.
Site Evaluation
On-site assessment, soil analysis, utility survey, and preliminary drainage mapping.
Design & Engineering
Drainage plan, structural drawings, material specification, permitting, and HOA documentation.
Scheduling & Prep
Material procurement, crew scheduling, and homeowner preparation instructions.
Excavation & Construction
Precision dig, structural assembly, drainage install, and controlled backfill.
Surface Restoration
Sod replacement, hardscape reinstatement, grade verification, and final inspection.
Grow-In Period
Sod establishment, seam integration, and follow-up quality check.
Every project begins with a site evaluation
No obligation. No deposit. We come to your property, evaluate the site conditions, and determine whether the project is feasible — and if it is, what it will actually take to do it right. Most evaluations take 60–90 minutes.