Basement Finishing – Little Falls Split-Level
Project Overview
This Little Falls homeowner had a raw, unfinished basement that had been sitting empty for over a decade. The 900-square-foot space was used for nothing more than storage, despite representing nearly a third of the home's total footprint. Moisture intrusion had stained the concrete floor, the exposed block walls were cold and uninviting, and overhead mechanicals ran in every direction without any concealment. The homeowner wanted to transform the space into a fully functional lower level — complete with a family room, a dedicated home office nook, a half-bathroom, and a utility/laundry room that could be closed off. Exterior Solutions LLC handled the full scope from waterproofing and framing through drywall, flooring, trim, and final paint, delivering a finished basement that added real, usable living space to the home.
Analysis
Our assessment revealed several conditions that had to be addressed before any finishing work could begin. First, we identified two areas along the north and east foundation walls where water was seeping in during heavy rain — a classic hydrostatic pressure issue common in older NJ split-levels. The existing sump pump was undersized for the footprint and nearing end of life. Second, the floor showed hairline cracks near the center that required patching before any flooring installation. Overhead, the ductwork, electrical conduit, and plumbing drain lines were all running at varying heights, making a consistent drop ceiling level difficult without careful planning. We also found that the existing subfloor was absent — the concrete was bare — meaning we needed to install a full dimple-mat moisture barrier system and sleeper subfloor before any finish flooring could go down. The half-bath required a rough-in that was not yet in place, so a concrete core drill and ejector pump system was required for below-grade drain installation. All of these findings were communicated clearly to the homeowner before scope was finalized.
Process
Work began with waterproofing — we installed an interior French drain channel along both problem walls, tied it into a new, properly sized sump pump with a battery backup, and applied hydraulic cement and waterproof membrane coating to the block walls. Once the moisture control was confirmed solid, we turned to the below-slab rough-in plumbing for the half-bath, drilling core holes and installing the ejector system with the proper venting routed up through the floor above. Framing followed: 2x4 pressure-treated bottom plates on the concrete floor, metal stud wall framing for the perimeter, and a dropped soffit ceiling system designed to hide the main HVAC duct run while maintaining a consistent 8-foot ceiling height throughout the open family room area. We framed out a separate enclosed utility room around the mechanicals and laundry, keeping the living spaces clean. The dimple mat moisture barrier and 3/4-inch OSB sleeper subfloor were installed across the entire floor area before any finish work began. Electrical rough-in included 12 recessed can lights, two dedicated circuits for the office nook, outlets on all walls per code, and a 50-amp sub-panel fed from the main. Insulation was installed in all exterior walls (R-15 mineral wool) and the ceiling (R-19 batts). Drywall was hung, taped, and finished to a Level 5 smooth coat throughout. We then installed luxury vinyl plank flooring in a 7-inch wide warm oak pattern across the family room and office, with ceramic tile in the half-bath and utility room. Trim package included 3.5-inch colonial baseboard, painted door casings, and a solid core half-bath door. The half-bath received a wall-hung vanity, elongated toilet, and a 24x48 subway tile surround. Final finish was two coats of premium eggshell in a warm greige tone throughout the living areas.
Outcome
The completed basement transformed a damp, unused storage area into a fully finished 900-square-foot living level. The family room is warm, bright, and properly insulated, with recessed lighting and clean LVP flooring that flows seamlessly from the staircase landing. The home office nook is fully wired with dedicated circuits and built-in shelf framing. The half-bathroom is clean, well-finished, and fully functional. The utility room is properly enclosed, keeping the noise and visual clutter of the mechanical systems out of the living spaces. The homeowner reported using the space daily within the first week of completion — the basement went from an afterthought to one of the most-used rooms in the house. Total livable square footage of the home increased by 32 percent.
Project Details
Materials Used
Waterproofing: WaterGuard interior drainage channel, SuperSump Plus sump pump with battery backup, Drylok Extreme waterproof masonry coating. Subfloor: DMX 1-Step dimple mat moisture barrier, 3/4-inch Advantech tongue-and-groove OSB. Framing: 2x4 pressure-treated lumber (sill plates), 3-5/8 metal studs (perimeter walls). Insulation: Rockwool Comfortbatt R-15 (walls), Owens Corning R-19 kraft-faced batts (ceiling). Drywall: 5/8-inch Type X mold-resistant drywall throughout. Flooring: COREtec Plus XL Enhanced luxury vinyl plank, 7-inch wide, Breckenridge Oak. Tile: 4x8 ceramic subway tile (bath/utility), Schluter KERDI waterproof membrane (bath wet walls). Plumbing: Zoeller 1/2-HP ejector pump, PVC Schedule 40 drain lines, Delta half-bath fixture package (faucet, toilet, shutoffs). Trim: 3.5-inch finger-jointed colonial baseboard, painted MDF door casings. Paint: Sherwin-Williams Accessible Beige SW 7036 (walls), Extra White SW 7006 (ceiling and trim).
Methods & Techniques
Interior French drain installation with new sump pump system. Below-slab rough-in plumbing with ejector pump for half-bath. Pressure-treated bottom plate framing on concrete. Metal stud perimeter wall framing. Dropped soffit ceiling system for mechanical concealment. Dimple mat and floating OSB subfloor over concrete. Electrical sub-panel installation, recessed lighting layout, and full rough-in to code. Mineral wool insulation in exterior framed walls. Level 5 drywall finish throughout. Direct-glue and floating LVP flooring installation. Schluter waterproofing system in wet areas. Full trim, paint, and finish package.
Key Highlights
Interior waterproofing system with new sump pump and battery backup. Below-slab ejector pump rough-in for half-bath addition. Dimple mat and floating subfloor system over concrete. 900 sq ft of LVP flooring with full trim package. Level 5 drywall finish throughout. Half-bath with subway tile, wall-hung vanity, and elongated toilet. Dedicated electrical sub-panel with 12 recessed lights and multiple circuits. Enclosed utility/laundry room with solid core door. Mineral wool insulation in all exterior walls. Completed in 5 weeks with zero change orders.