9.13.2.1. Required Dampproofing

 9.13.2.1. Required Dampproofing

This Article indicates where #dampproofing is required. Dampproofing is applied to #foundation walls to seal the small #pores that are always present in #concrete and #parging to reduce the #capillary water migration through concrete, parging and masonry block. Dampproofing does not provide #waterproofing, and should not be confused with waterproofing 

Quoted from Illustrated Users' Guide - NBC2015

The control of moisture

 The control of moisture

There are four sources of #moisture associated with #foundations:

 

(1) surface water, 

(2) soil moisture,

(3) groundwater, and 

(4) construction materials moisture. 

Surface #water from #rain and #snow-melt is controlled through the use of #eavestroughing and #grading. 

Soil moisture, in the form of water or water #vapour, is controlled by #dampproofing materials and #drainage.

 

Where the #groundwater table is high enough to cause hydrostatic pressure against the foundation, it is controlled by #waterproofing combined with a structural design capable of resisting water pressures. 

Construction moisture, principally water in concrete, is best controlled by allowing adequate #curing and drying time before enclosing.

Quoted from Illustrated Users' Guide - NBC2015

The Control of Moisture

 The Control of Moisture

The control of #moisture transfer through #foundations is needed to prevent damage to the interior finish material and #basement contents, and to protect the long-term integrity of the #building structure. The measures that are used to control moisture transfer through foundation walls are also intended to control indoor #humidity levels and contribute to the reduction of soil gas and #radon entry into #basements, thereby contributing to a healthy interior environment.

#soilgas

Quoted from Illustrated Users' Guide - NBC2015

9.12.4.1. Support of Footings

 9.12.4.1. Support of Footings 

This Article addresses #trenching below the #footing that is required for services. It requires that the soil in the trench be compacted by tamping to the footing base, or be filled with concrete having a strength of at least 10 MPa (1 400 psi), as illustrated in Figure 9.12.-8.

Quoted from Illustrated Users' Guide - NBC2015

9.12.3.1. Placement of Backfill

 9.12.3.1. Placement of Backfill 

This Article requires #backfill to maintain the #structural integrity of the #foundation. If a foundation wall is designed to be laterally supported at the top by the floor system and backfilling is to be carried out before the floor is in place, the wall may fail unless it is temporarily supported. One method for providing temporary support is shown in Figure 9.12.-7.

Care must be taken during backfilling to avoid damaging the drainage tile, the foundation wall, any externally applied thermal insulation, and #dampproofing or #waterproofing membrane.

Quoted from Illustrated Users' Guide - NBC2015

#foundationwall #floorsystem #drainagetile #thermalinsultaion

Depth of #foundations

Foundation #depths for #decks and other accessible exterior #platforms can be less than the minimums in NBC Table 9.12.2.2. if the deck is not more than one storey and not more than 55 m2 (590 ft.2) in area, the distance from the #ground to the underside of the #joists is 600 mm (2 ft.) or less, the deck does not support a #roof and its movement will not affect the structure it serves (Figure 9.12.-6).

Quoted from Illustrated Users' Guide -- NBC2015

9.12.1.1. Removal of Topsoil and Organic Matter

 9.12.1.1. Removal of Topsoil and Organic Matter 

This Article requires the removal of #topsoil and #organic matter from unexcavated areas.

 

This will help to make the space beneath a building inhospitable to #insect #pests and #vermin, and to keep it from generating objectionable #odours that might migrate into the structure above (see Figure 9.12.-1). 

For an additional level of insect resistance where #termites are known to occur, #stumps, #roots and other wood #debris must be removed to a depth of at least 300 mm (12 in.) in order to protect the structure.

Quoted from Illustrated Users' Guide -- NBC2015

9.10.13.15. Doors between Garages and Dwelling Units

 9.10.13.15. Doors between Garages and Dwelling Units

This Article requires that #doors between a #garage and a #dwelling unit be constructed so as to reduce the passage of exhaust #fumes and #gasoline #vapours into habitable areas. To reduce this risk, any door from the garage to the house must be #weatherstripped and have an automatic door closer to keep the door from being accidentally left open (Figure 9.10.-22). Since there is always some leakage past the weatherstripping under wind conditions, doors from spaces where people sleep should not have a direct #entrance to a garage.

Quoted from Illustrated Users' Guide - NBC2015

#exhaustfumes #gasolinevapours #doorcloser #habitable 

9.10.22.3. Protection around Cooktops

 9.10.22.3. Protection around #Cooktops

Because of the risk of #stovetop fires, combustible wall framing, #finishes and #cabinets within 450 mm (17 3/4 in.) of the area where a gas or electric cooktop is to be located must be protected above the level of the heating elements or burners by a material providing #fire resistance at least equivalent to that provided by 9.5 mm (3/8 in.) thickness of gypsum board (see Figure 9.10.-42). #Counter-top splash boards and back plates are exempted from this requirement.

Quoted from Illustrated Users' Guide - NBC2015

Unprotected Openings (NBC Article 9.10.14.4.) and Glazed Openings (NBC Article 9.10.15.4.)

 Unprotected Openings (NBC Article 9.10.14.4.) and Glazed Openings (NBC Article 9.10.15.4.)

NBC Subsection 9.10.14. uses the term “unprotected opening.” It means any #opening other than one equipped with a #closure having the required fire-protection rating, or any part of a #wall forming part of the exposing building face that has a fire-resistance rating less than that required for the exposing building face. Unprotected openings include windows, #doors and openings for #electrical and #mechanical services.

NBC Subsection 9.10.15. uses the term “glazed opening.” Glazed openings include windows and glazed portions of doors. The area of glazed openings is measured to the rough opening of the window or door, not to the edges of the #glazing.

The area of unprotected or glazed openings allowed on a building face is based on the distance from an exposing building face to a property line, the centre line of a #street or public thoroughfare, or an imaginary line between two buildings or two fire compartments on the same #property (Figure 9.10.-26).

Quoted from Illustrated Users' Guide -- NBC2015

#unprotectedopening #glazedopening #fireprotection #exposingbuildingface #fireresistancerating #roughopening #propertyline #firecompartment