Basement Waterproofing and Remodeling in Philadelphia

Dry, healthy, and beautifully finished basements—engineered the right way

A damp or leaky basement isn’t just uncomfortable—it increases the risk of mold, odors, damaged finishes, and structural issues. At NK Construction & Design, we fix the moisture at its source and then turn your basement into a clean, usable, code-compliant living space. We handle diagnosis, engineering, Philadelphia L&I permits, installation, and finishes—end to end.

Signs you need basement waterproofing

  • Pooled water after rain; damp or dark concrete
  • White, powdery efflorescence on walls; musty odors
  • Peeling paint, swollen trim, or rusted metal
  • Mold/mildew spots, allergy flare-ups
  • Wall cracks (vertical, diagonal, or stair-step) and flaking concrete

Health

Reduces mold risk and improves indoor air quality

Peace of mind

Storm-ready systems with battery backup keep spaces dry

Durability

Protects framing, drywall, and flooring from repeated damage

Resale & value

Buyers want dry, warrantied basements

Why waterproofing matters

Waterproofing solutions we provide

Your scope may combine several methods based on inspection findings

Interior perimeter drain (French drain) + sump system

Channel at footing directs water to a sealed sump basin with pump and optional battery backup & high-water alarm.

Crack sealing & wall treatments

Epoxy/urethane crack injection (as appropriate) and vapor-barrier liners; breathable coatings for moisture control.

Exterior grading & downspouts

Correct slope, extend downspouts, add yard drains to move water away from the foundation.

Dehumidification & air quality

Dedicated dehumidifier, sealed rim joists, and air sealing to maintain healthy humidity.

Structural tie-ins (if needed)

Carbon fiber, interior steel braces, or anchors for walls showing bowing or lateral pressure (paired with drainage).

We recommend the least-invasive solution that achieves a dry, warrantied result and meets Philadelphia L&I requirements.

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Basement remodeling & finishing

After waterproofing and dry, we design and build a space that fits your life

Space planning & permits

Family room, home office, gym, guest suite, playroom, or media lounge

Moisture-smart materials

Mold-resistant drywall, PVC/COMPOSITE trims, closed-cell foam at rim joists, LVP/engineered flooring

Egress-ready bedrooms

Egress-compliant window/well and smoke/CO protection (we handle permits/inspections)

Insulation & comfort

Proper R-values, air sealing, and sound control at ceilings/walls

Lighting & electrical

Recessed LEDs, dedicated circuits, low-profile fixtures for low ceilings

Storage & built-ins

Closets, under-stairs storage, shelving, and utility room organization

Finishes

Drywall, doors, paint, ceiling systems, bath rough-ins, wet bars, custom millwork

Our step-by-step process

Assessment & moisture mapping

Identify sources (surface water, hydrostatic pressure, humidity).

Plan & permits

Engineering as needed; NK manages L&I paperwork and inspections.

Waterproofing install

Drains, sump, crack sealing, grading/downspouts, dehumidification.

Dry-out & verify

Test and confirm system performance.

Remodeling build-out

Framing, insulation, MEPs, drywall, finishes, and final punchlist.

Warranty & handoff

System walkthrough, maintenance tips, and care guide.

Some examples of a Basement Waterproofing Project in Progress

GET IN TOUCH

Schedule a Call

or visit

Contact us

Frequently Asked Questions about Basement Waterproofing and Remodeling

Building trust through quality

NK Construction and Design waterproofing services

NK Construction and Design offers waterproofing services. We provide a full range of engineering services including design, construction management, inspection, testing, and certification.

Multi-Disciplinary Team

Licensed & insured crews; clean, contained job sites

Experience

Expertise with rowhomes, stone/brick foundations, and modern concrete basements

Transparency

Clear scopes, transparent pricing, and workmanship warranty

Recognized by the Industry

Recognized among the Top 5 General Contractors in Philadelphia (BuildZoom)

Philadelphia Code

Philadelphia code expertise with full permit/inspection handling

How Trust Looks Like