KCJ Contracting Inc
(661) 713-4238
Waterproofing since 1988

About KCJ Contracting Inc

Building envelope waterproofing across Los Angeles and Ventura County.

Who we are

All six sides of the structure.

KCJ Contracting has been protecting the building envelope in Los Angeles since 1988. We work on residential, commercial and multi family properties, from below grade and above grade waterproofing to deck coatings and roofing.

Water finds the one detail nobody thought about. So we treat the envelope as one continuous system and cover all six sides of a structure, rather than chasing a leak and leaving the next one to somebody else.

It is a small outfit and it is meant to be. The person who walks your building is the person who scopes the work and the person the crew answers to, which is the only way we know to keep the detailing consistent from one job to the next.

Licensed, bonded and insured. CSLB License #546580.

See what we install
KCJ Contracting installer applying waterproofing membrane on a hillside deck above the Pacific
KCJ Contracting installer trowelling an epoxy coating into a corner detail
How we work

What is under the surface is the whole job.

Almost everything we get called out to repair was installed by somebody who did the visible part correctly. The failure is nearly always in a layer nobody photographed: a membrane rolled onto a slab that was still damp, a lap sealed in a hurry at a corner, a drainage composite left off to save an afternoon.

So we scope the assembly, not the finish. On below grade work that means the wall gets signed off before backfill covers it, because after that nobody sees it again without an excavator.

Fig. 02 Coating assembly Section
Wearing surface Membrane Primer Substrate
A coating assembly in section. Every layer under the wearing surface is doing a job.
Plywood deck with every seam and fastener taped before the waterproofing membrane goes on
Built The layer nobody photographs: every seam and fastener on a deck taped before the membrane goes over it.
On our sites

The same standard on all six sides

Below grade, the walls and the decks are three different trades on most jobs. On ours they are one scope with one person accountable for the transitions between them.

Waterproofing membrane installed on a below grade foundation wall before backfill, with structural steel above
Below gradeMembrane and drainage before backfill
Full elevation wrapped in a weather resistive barrier with scaffolding still standing
The wallsWeather barrier across a full elevation
Finished textured deck coating over a roof deck, sealed to the building wall
DecksCoating coved up and terminated at the wall
Standing water held on a finished waterproofing membrane during a flood test
VerifiedFlood tested before it is covered
On the map

Where we work

Ventura County, Santa Clarita Valley, San Fernando Valley, and across Los Angeles itself.

  • Simi Valley
  • Thousand Oaks
  • Calabasas
  • Hidden Hills
  • West Hollywood
  • Hollywood
  • Beverly Hills
  • Bel Air
  • Holmby Hills
  • Malibu
  • Pacific Palisades
  • Santa Monica
  • Marina Del Rey
  • Manhattan Beach
  • Los Angeles
  • Pasadena
  • Glendale
  • Burbank
  • Sylmar

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