Commercial Below Grade Waterproofing Service

below grade waterproofing

JH3 Company has delivered first-rate below grade commercial waterproofing service for 30 years. We install watertight systems comprised of high quality waterproofing materials for commercial below grade structures like underground parking garages, basement walls and foundations.

Difficult below grade areas with penetrations or various angle changes are not a problem for us. We can apply a liquid waterproofing membrane instead of a sheet membrane. Do you need to waterproof a concrete slab to be repaved with a concrete topping or stone? How about waterproofing fountains or expansion joints? Again, not a problem. We have the training and experience how to apply the correct system within industry-established standards and local building codes.

Rather than list dozens of scenarios, we recommend contractors, engineers, architects or consultants simply contact us and speak with a JH3 waterproofing expert to discuss your unique specifications. We will be happy to explain the advantages and disadvantages of the various waterproofing membrane types (self-adhering, fluid-applied, sheet-applied) specific to your application.

JH3 Company is your reliable choice for waterproofing structures below ground at a commercial building in Santa Barbara County, Ventura County or northern Los Angeles County:

  • Walls
  • Foundations
  • Basements

  • Parking Decks & Garages
  • Mechanical rooms
  • Thick set mortar

  • Structural Slabs
  • Split-Slab constructions
  • Planters

Portfolio of Below Grade Waterproofing Projects


Before vs After

Before Waterproofing Parking Garage Wall
After Waterproofing Parking Garage Wall

(slide button left or right to compare before vs after)

Manufacturer Products

JH3 Company uses a wide variety of below grade commercial waterproofing products from industry leading manufacturers. All provide excellent protection as a strong and durable waterproofing barrier resistant to shrinking, peeling, sagging, drying out, cracking, or rotting.

  • E-Pro Waterproofing
  • BASF
  • Miracote

  • Sinak
  • Tremco
  • CCW

  • Delta
  • Protecto Wrap

Below Grade Waterproofing Cost

The cost to waterproof a below grade surface is based on numerous variables such as square footage, surface condition and material, budget limitations, deadline constraints, etc. Every commercial project is unique and therefore priced differently.

JH3 Company will be happy to provide you a free written waterproofing estimate by scheduling a visit to your office in our services areas. Any below grade surface can be waterproofed during new construction. However, waterproofing an existing surface years after its original below ground installation may require additional construction or repairs. We will explain our reasons in person.

Simply select your county location below to get started or call us toll free at (888) 550-8856.

Schedule Visit
Schedule Visit