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// CODE SNIPPET

R406.2 Concrete and Masonry Foundation Waterproofing

Los Angeles Residential Code > 4 Foundations > R406 Foundation Waterproofing and Dampproofing > R406.2 Concrete and Masonry Foundation Waterproofing
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In areas where a high water table or other severe soil-water conditions are known to exist, exterior foundation walls that retain earth and enclose interior spaces and floors below grade shall be waterproofed from the higher of (a) the top of the footing or (b) 6 inches (152 mm) below the top of the basement floor, to the finished grade. Walls shall be waterproofed in accordance with one of the following:

  1. Two-ply hot-mopped felts.
  2. Fifty-five-pound (25 kg) roll roofing.
  3. Six-mil (0.15 mm) polyvinyl chloride.
  4. Six-mil (0.15 mm) polyethylene.
  5. Forty-mil (1 mm) polymer-modified asphalt.
  6. Sixty-mil (1.5 mm) flexible polymer cement.
  7. One-eighth-inch (3 mm) cement-based, fiber-reinforced, waterproof coating.
  8. Sixty-mil (1.5 mm) solvent-free liquid-applied synthetic rubber.

Exception: Organic-solvent-based products such as hydrocarbons, chlorinated hydrocarbons, ketones and esters shall not be used for ICF walls with expanded polystyrene form material. Use of plastic roofing cements, acrylic coatings, latex coatings, mortars and pargings to seal ICF walls is permitted. Cold-setting asphalt or hot asphalt shall conform to Type C of ASTM D449. Hot asphalt shall be applied at a temperature of less than 200°F (93°C).

All joints in membrane waterproofing shall be lapped and sealed with an adhesive compatible with the membrane.

Related Code Sections


R406.2 Foundations, Concrete and Masonry Foundation Waterproofing
In areas where a high water table or other severe soil-water conditions are known to exist, exterior foundation walls that retain earth and enclose ...
Los Angeles Residential Code > 4 Foundations > R406 Foundation Waterproofing and Dampproofing > R406.2 Concrete and Masonry Foundation Waterproofing
R406.2 Foundations, Concrete and Masonry Foundation Waterproofing
In areas where a high water table or other severe soil-water conditions are known to exist, exterior foundation walls that retain earth and enclose ...
Los Angeles Residential Code > 4 Foundations > R406 Foundation Waterproofing and Dampproofing > R406.2 Concrete and Masonry Foundation Waterproofing
1805.3 Soils and Foundations, Waterproofing
Walls required to be waterproofed shall be of concrete or masonry and shall be designed and constructed ...
Los Angeles Building Code > 18 Soils and Foundations > 1805 Dampproofing and Waterproofing > 1805.3 Waterproofing
1805.3 Soils and Foundations, Waterproofing
Walls required to be waterproofed shall be of concrete or masonry and shall be designed and constructed ...
Los Angeles Building Code > 18 Soils and Foundations > 1805 Dampproofing and Waterproofing > 1805.3 Waterproofing
1805A.3 Soils and Foundations, Waterproofing
Walls required to be waterproofed shall be of concrete or masonry and shall be designed ...
Los Angeles Building Code > 18A Soils and Foundations > 1805A Dampproofing and Waterproofing > 1805A.3 Waterproofing
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