9.13.

(1) This Section applies to the control of moisture and soil gas ingress through walls, floors, and roofs in contact with the ground.

(1) Except as provided in Article 9.13.3.1., where the exterior finished ground level is at a higher elevation than the ground level inside the foundation walls, exterior surfaces of foundation walls below ground level shall be dampproofed.

(2) Except as provided in Sentence (3) and Article 9.13.3.1., floors-on-ground shall be dampproofed.

(3) Floors in garages, floors in unenclosed portions of buildings and floors installed over granular fill in conformance with Article 9.16.2.1. need not be dampproofed.

(4) Dampproofing in Sentence (1) is not required where the exterior surfaces of foundation walls below ground level are waterproofed.

(1) Except as otherwise specified in this Section, materials used for exterior dampproofing shall conform to,

(a) CAN/CGSB-37.1-M, “Chemical Emulsified Type, Emulsified Asphalt for Dampproofing”,

(b) CAN/CGSB-37.2-M, “Emulsified Asphalt, Mineral Colloid Type, Unfilled, for Dampproofing and Waterproofing and for Roof Coatings”,

(c) CGSB 37-GP-6Ma, “Asphalt, Cutback, Unfilled, for Dampproofing”,

(d) CAN/CGSB-37.16-M, “Filled, Cutback Asphalt for Dampproofing and Waterproofing”,

(e) CGSB 37-GP-18Ma, “Tar, Cutback, Unfilled, for Dampproofing”,

(f) CAN/CGSB-51.34-M, “Vapour Barrier, Polyethylene Sheet, for Use in Building Construction”, or

(g) CAN/CSA-A123.4, “Asphalt for Constructing Built-Up Roof Coverings and Waterproofing Systems.”

(1) The method of application of all bituminous dampproofing materials shall conform to,

(a) CAN/CGSB 37.3-M, “Application of Emulsified Asphalts for Dampproofing or Waterproofing”,

(b) CGSB 37-GP-12Ma, “Application of Unfilled Cutback Asphalt for Dampproofing”, or

(c) CAN/CGSB-37.22-M, “Application of Unfilled, Cutback Tar Foundation Coating for Dampproofing”.

(1) Unit masonry walls that are to be dampproofed shall be,

(a) parged on the exterior face below ground level with not less than 6 mm of mortar conforming to Section 9.20., and

(b) coved over the footing when the first course of block is laid.

(2) Concrete walls to be dampproofed shall have holes and recesses resulting from the removal of form ties sealed with cement mortar or dampproofing material.

(3) The surface of insulating concrete form walls that are to be dampproofed shall be repaired and free of projections and depressions that could lead to detrimental to the performance of the membrane to be applied.

(1) Dampproofing material shall be applied over the parging or concrete below ground level.

(1) Where a separate interior finish is applied to a concrete or unit masonry wall that is in contact with the soil, or where wood members are placed in contact with such walls for the installation of insulation or finish, the interior surface of the foundation wall below ground level shall be dampproofed.

(2) The dampproofing required in Sentence (1) shall extend from the basement floor and terminate at ground level.

(3) No membrane or coating with a permeance less than 170 ng/(Pa.s.m²) shall be applied to the interior surface of the foundation wall above ground level between the insulation and the foundation wall.

(1) Where floors are dampproofed, the dampproofing shall be installed below the floor, except that where a separate floor is provided over a slab, the dampproofing is permitted to be applied to the top of the slab.

(2) Where installed below the floor, dampproofing membranes shall consist of polyethylene not less than 0.15 mm thick, or type S roll roofing.

(3) Joints in dampproofing membranes described in Sentence (2) shall be lapped not less than 100 mm.

(4) Where installed above the slab, dampproofing shall consist of,

(a) no fewer than 2 mopped-on coats of bitumen,

(b) not less than 0.05 mm polyethylene, or

(c) other material providing equivalent performance.

(1) Preserved wood foundation walls shall be dampproofed as described in CAN/CSA-S406, “Construction of Preserved Wood Foundations”.

(1) Where hydrostatic pressure occurs, waterproofing is required for exterior surfaces of,

(a) floors-on-ground, and

(b) below ground walls, where the exterior finished ground level is at a higher elevation than the ground level inside the foundation walls.

(2) Roofs of underground structures shall be waterproofed to prevent the entry of water into the structure.

(1) Except as otherwise specified in this Section, materials used for exterior waterproofing shall conform to,

(a) CAN/CGSB-37.2-M, “Emulsified Asphalt, Mineral-Colloid Type, Unfilled, for Dampproofing and Waterproofing and for Roof Coatings”,

(b) CAN/CGSB-37.16-M, “Filled, Cutback Asphalt for Dampproofing and Waterproofing”, or

(c) CAN/CSA-A123.4, “Asphalt for Constructing Built-Up Roof Coverings and Waterproofing Systems”.

(1) The method of application of all bituminous waterproofing materials shall conform to CAN/CGSB-37.3-M, “Application of Emulsified Asphalts for Dampproofing or Waterproofing”.

(1) Unit masonry walls that are to be waterproofed shall be parged on exterior surfaces below ground level with not less than 6 mm of mortar conforming to Section 9.20.

(2) Concrete walls that are to be waterproofed shall have all holes and recesses resulting from removal of form ties sealed with mortar or waterproofing material.

(3) The surface of insulating concrete form walls that are to be waterproofed shall be repaired and free of projections and depressions that could be detrimental to the performance of the membrane to be applied.

(1) Concrete or unit masonry walls to be waterproofed shall be covered with no fewer than 2 layers of bitumen-saturated membrane, with each layer cemented in place with bitumen and coated overall with a heavy coating of bitumen.

(1) Basement floors-on-ground to be waterproofed shall have a system of membrane waterproofing provided between 2 layers of concrete, each of which shall be not less than 75 mm thick, with the floor membrane mopped to the wall membrane to form a complete seal.

(1) Where methane or radon gases are known to be a problem, construction shall comply with the requirements for soil gas control in Supplementary Standard SB-9.

(1) Except as provided in Sentence (2), all wall, roof and floor assemblies in contact with the ground shall be constructed to resist the leakage of soil gas from the ground into the building.

(2) Construction to resist leakage of soil gas into the building is not required for,

(a) garages and unenclosed portions of buildings,

(b) buildings constructed in areas where it can be demonstrated that soil gas does not constitute a hazard, or

(c) buildings that contain a single dwelling unit and are constructed to provide for subfloor depressurization in accordance with Supplementary Standard SB-9.

(3) Where soil gas control is required, a soil gas barrier shall be installed at walls and roofs in contact with the ground according to Supplementary Standard SB-9.

(4) Where soil gas control is required, it shall consist of one of the following at floors in contact with the ground:

(a) a soil gas barrier installed according to Supplementary Standard SB-9 , or

(b) where the building contains a single dwelling unit only, a subfloor depressurization system installed according to Supplementary Standard SB-9.

(1) Materials used to provide a barrier to soil gas ingress through floors-on-ground shall conform to CAN/CGSB-51.34-M, “Vapour Barrier, Polyethylene Sheet, for Use in Building Construction”.