Elite Concrete Restoration & Concrete Repair
8616 Cleta St, Downey
general contractor point of interest establishment
West Coast Deck Waterproofing
15960 Downey Ave # A, Paramount
general contractor point of interest establishment
Townsend's Appliance Services
15725 Normandie Ave, Gardena
home goods store store general contractor
Sinai Construction Engineering
4489 W Pico Blvd, Los Angeles
general contractor point of interest establishment
California Earthquake Retrofitting & Foundation Repair
400 Corporate Pointe, Culver City
general contractor point of interest establishment
California Foundation Works & Repair
21252 S Western Ave, Torrance
general contractor point of interest establishment
All Weather Waterproofing & Coating
10790 Rose Ave #101, Los Angeles
point of interest establishment
ADCO Roofing and Waterproofing
5743 Cahuenga Blvd, North Hollywood
roofing contractor point of interest establishment
Specialty One Waterproofing
1507 7th St # 3, Santa Monica
general contractor point of interest establishment
Alpha Structural, Inc
8334 Foothill Blvd, Sunland-Tujunga
general contractor point of interest establishment
OC Decks
16582 Gothard St, Huntington Beach
general contractor point of interest establishment
16582 Gothard St, Huntington Beach
point of interest establishment
Weinstein Construction | Earthquake Retrofitting
15102 Raymer St, Van Nuys
point of interest establishment
General Waterproofing & Construction, Inc.
8953 Woodman Ave #205, Arleta
general contractor point of interest establishment
Aleph Construction & Waterproofing, Inc.
general contractor point of interest establishment
Waterproofing Experts. Inc
7736 Deering Ave, Canoga Park
roofing contractor general contractor point of interest
Slater Waterproofing Inc
5577 E Arrow Hwy, Montclair
general contractor point of interest establishment

More About Basement Waterproofing Services from Wikipedia

Basement waterproofing involves techniques and materials used to prevent damp (structural) from penetrating the basement of a house or a building. Waterproofing a basement that is below ground level can require the application of sealant materials, the installation of drains and sump pumps, and more.


Waterproofing is usually required by building codes for structures that are built at or below ground level. Waterproofing and drainage considerations are especially important in cases where ground water is likely to build up in the soil or where there is a high water table.

Water in the soil causes hydrostatic pressure to be exerted underneath basement floors and walls. This hydrostatic pressure can force water in through cracks, which can cause major structural damage as well as mold, decay, and other moisture-related problems.


Several measures exist to prevent water from penetrating a basement foundation or to divert water that has penetrated a foundation:

  • Interior wall and floor sealers

  • Interior water drainage

  • Exterior drainage

  • Exterior waterproofing coatings

  • Box type waterproofing

  • Foundation crack injections

Interior sealants

In poured concrete foundations, cracks and pipe penetrations are the most common entry points for seepage. These openings can be sealed from the interior. Epoxy, which are strong adhesives, or Polyurethane can be pressure injected into the openings, thus penetrating the foundation through to the exterior and cutting off the path of the seepage.

In masonry foundations, interior sealers will not provide permanent protection from water infiltration where hydrostatic pressure is present. However, interior sealers are good for preventing high atmospheric humidity inside the basement from absorbing into the porous masonry and causing spalling. Spalling is a condition where constant high humidity or moisture breaks down masonry surfaces, causing deterioration and shedding of the concrete surfaces.

Interior water drainage

Although interior water drainage is not technically waterproofing, it is a widely accepted technique in mitigating basement water and is generally referred to as a basement waterproofing solution. Many interior drainage systems are patented and recognized by BOCA (International Building Code) as being effective in controlling basement water.

A common system for draining water that has penetrated a basement involves creating a channel around the perimeter of the basement alongside the Foundation (engineering) footers. A French drain, PVC pipe, or a patented drainage system is installed in the newly-made channel. The installed drain is covered with new cement.

The drainage system collects any water entering the basement and drains it to an internally placed sump pump system, which will then pump the water out of the basement. Wall conduits (such as dimple boards or other membranes) are fastened to the foundation wall and extend over the new drainage to guide any moisture down into the system.

Interior waterproofing

Interior basement waterproofing using coatings is effective where condensation is the main source of wetness. It is also effective if the problem has minor dampness. Usually, interior waterproofing will not stop major leaks.

Exterior waterproofing

Waterproofing a structure from the exterior is the only method the IBC (International Building Code) recognizes as adequate to prevent structural damage caused by water intrusion.

Waterproofing an existing basement begins with excavating to the bottom sides of the Shallow foundation. Once excavated, the walls are then power washed and allowed to dry. The dry walls are sealed with a waterproofing membrane, and new drainage tiles (weeping tiles) are placed at the side of the footing.

Over the past ten years, polymer-based waterproofing products have been developed. Polymer-based products last for the lifetime of the building and are not affected by soil pH. Polymer-based waterproofing materials can be sprayed directly onto a wall, are very fast curing, and are semi-flexible, allowing for some movement of the substrate (building).

Causes of water seepage and leaks

Water seepage in basement and crawl spaces usually occurs over long periods of time and can be caused by numerous factors.

  • Concrete is one of the most commonly used materials in home construction. When pockets of air are not removed, or the mixture is not allowed to cure properly, the concrete can crack, which allows water to force its way through the wall.

  • Foundations (footings) are horizontal pads that define the perimeter of foundation walls. When footings are too narrow or are not laid deep enough, they are susceptible to movement caused by soil erosion.

  • Gutters and downspouts are used to catch rain water as it falls and to discharge it away from houses and buildings. When gutters are clogged or downspouts are broken, rainwater is absorbed by the soil near the foundation, increasing Fluid statics#Hydrostatic pressure.

  • Weeping tile is a porous plastic drain pipe installed around the perimeter of the house. The main purpose of external weeping tile is preventing water from getting into a basement. However, these pipes can become clogged or damaged, which causes excess water to put pressure on internal walls and basement floors.

  • Water build up inside window wells, after heavy rain or snow, can lead to leaks through basement window seams. Window well covers can be used to prevent water from accumulating in the window well.

  • Ground saturation is another common form of basement leaks. When the footing drain fails the ground around the basement can contain too much water and when the saturation point is met flooding can occur.

Warning signs of water damage

Signs that water is seeping into a basement or crawlspace often take years to develop and may not be easily visible. Over time, multiple signs of damage may become evident and could lead to Structural integrity and failure.

  • Cracked walls: Cracks may be horizontal, vertical, diagonal or stair-stepped. Severe pressure or structural damage is evident by widening cracks.

  • Buckling walls: Usually caused by hydrostatic pressure. Walls appear to be bowed inward.

  • Peeling paint: Water seeping through walls may lead to bubbling or peeling paint along basement walls.

Learn more about Basement Waterproofing Services:

https://en.wikipedia.org/wiki/Basement Waterproofing