Part 5 — Environmental Separation

(1) The scope of this Part shall be as described in Subsection 1.1.2. of Division A.

(1) This Part applies to,

(a) building materials, components and assemblies exposed to exterior space or the ground, including those separating interior space from exterior space or separating interior space from the ground,

(b) building materials, components and assemblies separating environmentally dissimilar interior spaces, and

(c) site materials, components, assemblies and grading that may affect environmental loads on building materials, components and assemblies exposed to exterior space or the ground.

(1) Building materials, components and assemblies that separate dissimilar environments or are exposed to the exterior shall be designed and constructed to provide sufficient capacity and integrity to resist or accommodate,

(a) all environmental loads, and effects of those loads, that may reasonably be expected having regard to,

(i) the intended use of the building, and

(ii) the environment to which the materials, components and assemblies are subject, and

(b) all structural loads, and effects of those loads, that may be reasonably expected.

(1.1) Where building materials, components or assemblies perform more than one function, they shall satisfy the requirements of all of those functions.

(2) The design and construction required by Clause (1)(a) shall comply with Subsection 5.2.1.

(3) The design and construction required by Clause (1)(b) shall comply with Subsection 5.2.2., with regard to,

(a) materials, components and assemblies, and associated loads, that are identified in Part 4,

(b) air pressure loads imposed on air barrier systems,

(c) wind up-lift imposed on roofing, and

(d) hydrostatic pressure imposed on the means of protection from moisture in the ground.

(4) For materials, components, assemblies and loads to which Sentence (3) does not apply, the design and construction required by Clause (1)(b) shall,

(a) comply with Subsection 5.2.2. for individual applicable loads, or

(b) in the case of common materials, components and assemblies, and their installation, be based on proven past performance over a period of several years for individual applicable loads.

(5) Materials, components and assemblies separating dissimilar environments and assemblies exposed to the exterior, including their connections, that are subject to structural loads referred to in Article 5.2.2.1., shall,

(a) transfer such loads to the building structure without adverse effects on the performance of other materials, components or assemblies,

(b) not deflect to a degree that adversely affects the performance of other materials, components or assemblies, and

(c) be designed, and constructed according to that design, to accommodate,

(i) the maximum relative structural movement that may reasonably be expected, and

(ii) construction tolerances that may reasonably be expected.

(1) Except as provided in Sentence (2), materials used in building components and assemblies that separate dissimilar environments, or in assemblies exposed to the exterior, shall be,

(a) compatible with adjoining materials, and

(b) resistant to any mechanisms of deterioration that may reasonably be expected given,

(i) the nature and function of the materials,

(ii) the exposure of the materials, and

(iii) the climatic conditions in which the materials will be installed.

(2) Material compatibility and deterioration resistance are not required where it can be shown that incompatibility or uncontrolled deterioration will not adversely affect any of,

(a) the health or safety of building users,

(b) the intended use of the building, or

(c) the operation of building services.

(3) Design and construction of assemblies separating dissimilar environments and assemblies exposed to the exterior shall be in accordance with good practice, such as described in CSA S478, "Guideline on Durability in Buildings".

(1) Structural and fire safety requirements in other Parts of the Code shall apply.

(1) Above ground climatic loads shall be determined according to MMAH Supplementary Standard SB-1, "Climatic and Seismic Data".

(2) Except as provided in Sentence (3), below ground exterior environmental loads not described in MMAH Supplementary Standard SB-1, "Climatic and Seismic Data", shall be determined from existing geological and hydrological data or from site tests.

(3) Where local design and construction practice has shown soil temperature analysis to be unnecessary, soil temperatures need not be determined.

(1) Interior environmental loads shall be determined in accordance with good engineering practice as described in Sentence 6.2.1.1.(1) based on the intended use of the space.

(1) Calculations related to the transfer of heat, air and moisture and the transmission of sound shall conform to good engineering practice such as that described in the ASHRAE Fundamentals Handbook.

(2) For the purposes of any analysis conducted to indicate conformance to the thermal resistance levels required in Article 5.3.1.2., soil temperatures shall be determined based on annual average soil temperature, seasonal amplitude of variation and attenuation of variation with depth.

(3) Wind load calculations shall conform to Subsection 4.1.7.

(1) Where materials, components or assemblies that separate dissimilar environments or are exposed to the exterior, or their connections, are required to be designed for structural loads, these loads shall be determined in accordance with Part 4.

(2) Except as provided in Article 4.1.8.18., the structural loads referred to in Sentence (1) and their related effects shall include,

(a) dead loads transferred from structural elements,

(b) wind, snow, rain, hydrostatic and earth pressures,

(c) earthquake effects for post-disaster buildings, depending on their intended function,

(d) live loads due to use and occupancy, and

(e) loads due to thermal or moisture-related expansion and contraction, deflection, deformation, creep, shrinkage, settlement, and differential movement.

(3) Where materials, components or assemblies that separate dissimilar environments or are exposed to the exterior, or their connections, can be expected to be subject to loads or other effects not otherwise described in this Subsection or in Part 4, such loads or other effects shall be taken into account in the design based on the most current and applicable information available.

(1) This Article applies to the determination of wind load to be used in the design of materials, components and assemblies, including their connections, that separate dissimilar environments or are exposed to the exterior, where these are,

(a) subject to wind load, and

(b) required to be designed to resist wind load.

(2) Except as provided in Sentence (3), the wind load referred to in Sentence (1) shall be 100% of the specified wind load determined in accordance with Article 4.1.7.1.

(3) Where it can be shown by test or analysis that a material, component, assembly or connection described in Sentence (1) will be subject to less than 100% of the specified wind load, the wind load referred to in Sentence (1) shall be not less than the load determined by test or analysis.

(4) Except as provided in Sentence (5), the wind uplift resistance of membrane roofing assemblies shall be determined in accordance with the requirements of CSA A123.21, "Dynamic Wind Uplift Resistance of Membrane-Roofing Systems".

(5) Membrane roofing assemblies with proven past performance for the anticipated wind loads need not comply with Sentence (4).

(1) Structural design shall be carried out in accordance with Subsection 4.1.3. and other applicable requirements in Part 4.

(1) Except as provided in Sentence (2), where a building component or assembly will be subjected to an intended temperature differential, the component or assembly shall include materials to resist heat transfer or means to dissipate transferred heat in accordance with this Subsection.

(2) The installation of materials to resist heat transfer in accordance with this Subsection is not required where it can be shown that uncontrolled heat transfer will not adversely affect any of,

(a) the health or safety of building users,

(b) the intended use of the building, or

(c) the operation of building services.

(1) Materials and components installed to provide the required resistance to heat transfer or the means implemented to dissipate heat shall,

(a) provide sufficient resistance or dissipation,

(i) to minimize surface condensation on the warm side of the component or assembly,

(ii) in conjunction with other materials and components in the assembly, to minimize condensation within the component or assembly,

(iii) in conjunction with systems installed for space conditioning, to meet the interior design thermal conditions for the intended occupancy, and

(iv) to minimize ice damming on sloped roofs, and

(b) take into account the conditions on either side of the environmental separator.

(1) Where a material required by Article 5.3.1.1. is intersected by a building assembly, penetrated by a high conductance component or interrupted by expansion, control or construction joints, and where condensation is likely to occur at these intersections, penetrations or interruptions, sufficient thermal resistance shall be provided so as to minimize condensation at these locations.

(2) Materials providing required thermal resistance shall have sufficient inherent resistance to air flow or be positioned in the assembly so as to prevent convective air flow through and around the material.

(3) Revoked: O. Reg. 88/19, s. 124.

(1) Where a building component or assembly separates interior conditioned space from exterior space, interior space from the ground, or environmentally dissimilar interior spaces, the properties and position of the materials and components in those components or assemblies shall be such that they control air leakage or permit venting to the exterior so as to,

(a) provide acceptable conditions for the building occupants,

(b) maintain appropriate conditions for the intended use of the building,

(c) minimize the accumulation of condensation in and penetration of precipitation into the building component or assembly,

(d) control heat transfer to roofs where ice damming can occur, and

(e) not compromise the operation of building services.

(2) Except as provided in Sentence (3), an air barrier system shall be installed to provide the principal resistance to air leakage.

(3) An air barrier system is not required where it can be shown that uncontrolled air leakage will not adversely affect any of,

(a) the health or safety of building users,

(b) the intended use of the building, or

(c) the operation of building services.

(1) Except as provided in Sentence (2), materials intended to provide the principal resistance to air leakage shall,

(a) have an air leakage characteristic not greater than 0.02 L/(s•m2) measured at an air pressure difference of 75 Pa when tested in accordance with ASTM E2178, "Air Permeance of Building Materials", or

(b) conform to CAN/ULC-S741, "Air Barrier Materials - Specification".

(2) The air leakage limit specified in Sentence (1) is permitted to be increased where it can be shown that the higher rate of leakage will not adversely affect any of,

(a) the health or safety of building users,

(b) the intended use of the building, or

(c) the operation of building services.

(3) The air barrier system shall be continuous,

(a) across construction, control and expansion joints,

(b) across junctions between different building assemblies, and

(c) around penetrations through the building assembly.

(4) The structural design of air barrier systems installed in assemblies subject to air pressure loads shall comply with Article 5.1.4.1. and Subsection 5.2.2.

(1) Where a building component or assembly is subjected to differentials in temperature and water vapour pressure, the properties and position of the materials and components in those components or assemblies shall be such that they control vapour diffusion or permit venting to the exterior so as to minimize accumulation of condensation in the building component or assembly.

(2) Except as provided in Sentence (3), a vapour barrier shall be installed to provide the principal resistance to water vapour diffusion.

(3) A vapour barrier is not required where it can be shown that uncontrolled vapour diffusion will not adversely affect any of,

(a) the health or safety of building users,

(b) the intended use of the building, or

(c) the operation of building services.

(1) The vapour barrier shall have sufficiently low permeance and shall be positioned in the building component or assembly so as to,

(a) minimize moisture transfer by diffusion, to surfaces within the assembly that would be cold enough to cause condensation at the design temperature and humidity conditions, or

(b) reduce moisture transfer by diffusion, to surfaces within the assembly that would be cold enough to cause condensation at the design temperature and humidity conditions, to a rate that will not allow sufficient accumulation of moisture to cause deterioration or otherwise adversely affect any of,

(i) the health or safety of building users,

(ii) the intended use of the building, or

(iii) the operation of building services.

(2) Coatings applied to gypsum wallboard to provide required resistance to vapour diffusion shall conform to the requirements of Sentence (1) when tested in accordance with CAN/CGSB-1.501-M, "Method for Permeance of Coated Wallboard".

(3) Coatings applied to materials other than gypsum wallboard to provide required resistance to vapour diffusion shall conform to the requirements of Sentence (1) when tested in accordance with ASTM E96 / E96M, "Water Vapor Transmission of Materials" by the desiccant method (dry cup).

(1) Except as provided in Sentence (2), where a building component or assembly is exposed to precipitation, the component or assembly shall,

(a) minimize ingress of precipitation into the component or assembly, and

(b) prevent ingress of precipitation into interior space.

(2) Protection from ingress of precipitation is not required where it can be shown that such ingress will not adversely affect any of,

(a) the health or safety of building users,

(b) the intended use of the building, or

(c) the operation of building services.

(1) Reserved

(2) Reserved

(3) Where protective materials are applied to assemblies to provide the required protection from precipitation, the materials shall be installed so as to shed precipitation or otherwise minimize its entry into the assembly and prevent its penetration through the assembly.

(4) Where protective materials described in Sentence (3) are part of a vegetative roofing system, they shall be resistant to root and rhizome penetration when tested in accordance with ANSI/GRHC/SPRI VR-1, "Procedure for Investigating Resistance to Root Penetration on Vegetative Roofs".

(1) Except as provided in Sentence (2), materials, components, assemblies, joints in materials, junctions between components and junctions between assemblies exposed to precipitation shall be,

(a) sealed to prevent ingress of precipitation, or

(b) drained to direct precipitation to the exterior.

(2) Sealing or drainage are not required where it can be shown that the omission of sealing and drainage will not adversely affect any of,

(a) the health or safety of building users,

(b) the intended use of the building, or

(c) the operation of building services.

(1) Where water, snow or ice can accumulate on a building, provision shall be made to minimize the likelihood of hazardous conditions arising from such accumulation.

(2) Where precipitation can accumulate on sloped or horizontal assemblies, provision shall be made for drainage conforming with Section 7.4.

(3) Where downspouts are provided and are not connected to a sewer, provisions shall be made to,

(a) divert the water from the building, and

(b) prevent soil erosion.

(4) Junctions between vertical assemblies, and sloped or horizontal assemblies, shall be designed and constructed to minimize the flow of water from the sloped or horizontal assembly onto the vertical assembly.

(1) A solar collector system is permitted to be installed above roofing materials conforming to Table 5.10.1.1.

(1) This Subsection applies to the location of buildings, the grading of building sites, the directing of surface water away from building assemblies and the provision of means for drainage.

(1) The building shall be located, the building site shall be graded or surface water shall be directed away from building assemblies so as to,

(a) minimize the accumulation of surface water against the building in a manner that does not adversely affect adjacent buildings or properties, or

(b) accommodate the accumulation of surface water on the property in a manner that does not adversely affect the building or adjacent buildings or properties.

(2) Drainage shall be provided to direct surface water away from building assemblies separating interior space from the ground, except,

(a) where the building assembly is designed in accordance with Subsection 5.7.2. to withstand continuous hydrostatic pressure, or

(b) where it can be shown that the lack of drainage will not adversely affect any of,

(i) the health or safety of building users,

(ii) the intended use of the building, or

(iii) the operation of building services.

(1) This Subsection applies to waterproofing materials, components, assemblies and systems applied to building assemblies that separate dissimilar environments and are subjected to hydrostatic pressure.

(1) Waterproofing materials, components, assemblies and systems described in Article 5.7.2.1. shall be designed in accordance with Subsection 5.1.4.

(2) The hydrostatic design loads shall be determined in accordance with Subsection 5.2.2.

(1) Waterproofing materials, components, assemblies and systems described in Article 5.7.2.1. shall comply with Article 5.7.3.2.

(1) This Subsection applies to the protection of building assemblies that separate interior space from the ground.

(1) Except as provided in Sentence (2) and Article 5.7.3.4., building assemblies described in Article 5.7.3.1. shall be protected by waterproofing in accordance with Article 5.7.3.3. so as to minimize the ingress of ground water into the building or the accumulation of ground water against the building.

(2) Waterproofing is not required where it can be shown that,

(a) a building is designed to accommodate the ingress or accumulation of ground water, or

(b) the ingress or accumulation of ground water will not adversely affect any of,

(i) the health or safety of building users,

(ii) the intended use of the building, or

(iii) the operation of building services.

(1) Waterproofing materials, components, assemblies or systems installed to provide the required protection shall form a continuous and impervious barrier to the ingress of ground water and be capable of accommodating,

(a) imperfections, construction joints, control joints and expansion joints,

(b) junctions between different building assemblies, and

(c) elements penetrating building assemblies.

(1) Vertical building assemblies that separate interior space from the ground are permitted to be dampproofed where,

(a) the building assemblies are not subjected to hydrostatic pressure,

(b) the substrate is cast-in-place concrete, and

(c) a drainage layer is installed between the building assembly and the soil.

(2) Joints, junctions and penetrations shall be designed and constructed to maintain the continuity of the dampproofing.

(1) Except as provided in Sentence (2), a dwelling unit shall be separated from every other space in a building in which noise may be generated by,

(a) a separating assembly and adjoining construction, which, together, provide an apparent sound transmission class rating not less than 47, or

(b) a separating assembly that provides a sound transmission class rating not less than 50 and adjoining construction that conforms to Article 9.11.1.4.

(2) Construction separating a dwelling unit from an elevator shaft or a refuse chute shall have an STC rating not less than 55.

(1) The STC ratings of separating assemblies shall be determined in accordance with ASTM E413, "Classification for Rating Sound Insulation", using the results from measurements carried out in accordance with ASTM E90, "Laboratory Measurement of Airborne Sound Transmission Loss of Building Partitions and Elements".

(2) The ASTC ratings of separating assemblies and adjoining construction shall be,

(a) determined in accordance ASTM E413, "Classification for Rating Sound Insulation", using the results from measurements carried out in accordance with ASTM E336, "Measurement of Airborne Sound Attenuation Between Rooms in Buildings", or

(b) calculated in accordance with,

(i) the detailed method described in Article 5.8.1.4., or

(ii) the simplified method described in Article 5.8.1.5.

(1) Compliance with the required STC ratings shall be demonstrated through,

(a) measurements carried out in accordance with Sentence 5.8.1.2.(1), or

(b) the construction of separating assemblies conforming to Table 1 or 2 of MMAH Supplementary Standard SB-3, "Fire and Sound Resistance of Building Assemblies", as applicable.

(2) Compliance with the required ASTC ratings shall be demonstrated through,

(a) measurements or calculations carried out in accordance with Sentence 5.8.1.2.(2), or

(b) the construction of separating assemblies conforming to Table 1 or 2 of MMAH Supplementary Standard SB-3, "Fire and Sound Resistance of Building Assemblies", as applicable, that have an STC rating not less than 50 in conjunction with flanking assemblies constructed in accordance with Article 9.11.1.4.

(1) This Article sets out the detailed method for calculating the ASTC ratings of separating assemblies and adjoining construction referred to in Subclause 5.8.1.2.(2)(b)(i).

(2) The sound transmission loss measured in accordance with ASTM E90, "Laboratory Measurement of Airborne Sound Transmission Loss of Building Partitions and Elements", shall be used in lieu of the sound reduction index required in ISO 15712-1, "Building Acoustics - Estimation of Acoustic Performance of Buildings From the Performance of Elements - Part 1: Airborne Sound Insulation Between Rooms".

(3) The vibration reduction index for the junctions between separating assemblies shall be,

(a) determined using the equations presented in Annex E of ISO 15712-1, "Building Acoustics - Estimation of Acoustic Performance of Buildings From the Performance of Elements - Part 1: Airborne Sound Insulation Between Rooms", or

(b) measured in accordance with Parts 1 to 4 of ISO 10848, "Acoustics - Laboratory Measurement of the Flanking Transmission of Airborne and Impact Sound Between Adjoining Rooms".

(4) The normalized flanking level difference shall be measured in accordance with Parts 1 to 4 of ISO 10848, "Acoustics - Laboratory Measurement of the Flanking Transmission of Airborne and Impact Sound Between Adjoining Rooms".

(5) The direct sound reduction index for the separating assembly in situ shall be determined from sound transmission loss in accordance with Clause (a) or (b), depending on the type of construction:

(a) for a lightweight separating wall or floor assembly with wood or steel framing, the index shall be taken as equal to the sound transmission loss, without correction,

(b) for a heavyweight separating wall or floor assembly of concrete or masonry, the index shall be determined in accordance with the detailed method for structure-borne transmission presented in ISO 15712-1, "Building Acoustics - Estimation of Acoustic Performance of Buildings From the Performance of Elements - Part 1: Airborne Sound Insulation Between Rooms".

(6) The flanking sound reduction index for each flanking path at each edge of the separating assembly shall be determined in accordance with Clause (a), (b) or (c), depending on the type of construction:

(a) for a lightweight separating wall or floor assembly with wood or steel framing and connected lightweight flanking assemblies with wood or steel framing, the index shall be taken as equal to the normalized flanking level difference re-normalized for the ASTC field situation in accordance with Annex F of ISO 15712-1, "Building Acoustics - Estimation of Acoustic Performance of Buildings From the Performance of Elements - Part 1: Airborne Sound Insulation Between Rooms",

(b) for a heavyweight separating wall or floor assembly of concrete or masonry and connected flanking assemblies of concrete or masonry, the index shall be determined in accordance with the detailed method for structure-borne transmission presented in ISO 15712-1, "Building Acoustics - Estimation of Acoustic Performance of Buildings From the Performance of Elements - Part 1: Airborne Sound Insulation Between Rooms",

(c) for a mixture of lightweight framed assemblies and heavyweight concrete or masonry assemblies, the index shall be determined in accordance with Clause (a) or (b).

(7) Once the pertinent indices and measurements referred to in Sentences (2) to (6) have been determined based on the type of construction, the apparent sound reduction index shall then be determined in accordance with ISO 15712-1, "Building Acoustics - Estimation of Acoustic Performance of Buildings From the Performance of Elements - Part 1: Airborne Sound Insulation Between Rooms".

(8) The ASTC rating shall be calculated in accordance with ASTM E413, "Classification for Rating Sound Insulation", using the apparent sound reduction index determined in Sentence (7), which shall be treated as equivalent to the values of apparent sound transmission loss measured in accordance with ASTM E336, "Measurement of Airborne Sound Attenuation between Rooms in Buildings".

(1) This Article sets out the simplified method for calculating the ASTC ratings of separating assemblies and adjoining construction referred to in Subclause 5.8.1.2.(2)(b)(ii).

(2) The STC rating shall be used in lieu of the weighted sound reduction index required in ISO 15712-1, "Building Acoustics - Estimation of Acoustic Performance of Buildings From the Performance of Elements - Part 1: Airborne Sound Insulation Between Rooms".

(3) The vibration reduction index for the junctions between separating assemblies shall be,

(a) determined using the equations presented in Annex E of ISO 15712-1, "Building Acoustics - Estimation of Acoustic Performance of Buildings From the Performance of Elements - Part 1: Airborne Sound Insulation Between Rooms", or

(b) measured in accordance with Parts 1 to 4 of ISO 10848, "Acoustics - Laboratory Measurement of the Flanking Transmission of Airborne and Impact Sound Between Adjoining Rooms".

(4) The weighted normalized flanking level difference shall be determined in accordance with ASTM E413, "Classification for Rating Sound Insulation", using the results from measurements carried out in accordance with Parts 1 to 4 of ISO 10848, "Acoustics - Laboratory Measurement of the Flanking Transmission of Airborne and Impact Sound Between Adjoining Rooms".

(5) The direct weighted sound reduction index for the separating assembly shall be taken as equal to the STC rating, without correction.

(6) The weighted flanking sound reduction index for each flanking path at each edge of the separating assembly shall be determined in accordance with Clause (a) or (b), depending on the type of construction:

(a) for a lightweight separating wall or floor assembly with wood or steel framing and connected lightweight flanking assemblies with wood or steel framing, the index shall be taken as equal to the weighted normalized flanking level difference re-normalized for the ASTC field situation in accordance with Annex F of ISO 15712-1, "Building Acoustics - Estimation of Acoustic Performance of Buildings From the Performance of Elements - Part 1: Airborne Sound Insulation Between Rooms",

(b) for a heavyweight separating wall or floor assembly of concrete or masonry and connected flanking assemblies of concrete or masonry, the index shall be determined in accordance with the simplified method for structure-borne transmission presented in ISO 15712-1, "Building Acoustics - Estimation of Acoustic Performance of Buildings From the Performance of Elements - Part 1: Airborne Sound Insulation Between Rooms".

(7) Once the pertinent indices and measurements referred to in Sentences (2) to (6) have been determined based on the type of construction, the ASTC rating shall then be calculated in accordance with ISO 15712-1, "Building Acoustics - Estimation of Acoustic Performance of Buildings From the Performance of Elements - Part 1: Airborne Sound Insulation Between Rooms".

(1) Except as provided in Sentence (2) and elsewhere in this Part, materials and components, and their installation, shall conform to the requirements of the applicable standards in Table 5.10.1.1. where those materials or components are,

(a) incorporated into environmental separators or assemblies exposed to the exterior, and

(b) installed to fulfill the requirements of this Part.

(2) The requirements for flame-spread ratings contained in thermal insulation standards shall be applied only as required in Part 3.

Table 5.10.1.1. Standards Applicable to Environmental Separators and Assemblies Exposed to the Exterior

**Forming Part of Sentence 5.10.1.1.(1)**

(1) The flame-spread rating of gypsum board shall be determined in accordance with CAN/ULC-S102, "Test for Surface Burning Characteristics of Building Materials and Assemblies", in lieu of ASTM E84, "Surface Burning Characteristics of Building Materials", as indicated in ASTM C1396 / C1396M, "Gypsum Board".

(2) The flame-spread rating of glass mat gypsum panels shall be determined in accordance with CAN/ULC-S102, "Test for Surface Burning Characteristics of Building Materials and Assemblies", in lieu of ASTM E84, "Surface Burning Characteristics of Building Materials", as indicated in ASTM C1658 / C1658M, "Glass Mat Gypsum Panels".

(3) For the purpose of compliance with Part 5, ASTM D3019, "Lap Cement Used with Asphalt Roll Roofing, Non-Fibered, Asbestos-Fibered, and Non-Asbestos-Fibered", applies only with respect to non-fibered and non-asbestos-fibered (Types I and III) asphalt roll roofing.

(1) This Subsection applies to windows, doors and skylights, including their components, that separate,

(a) interior space from exterior space, or

(b) environmentally dissimilar interior spaces.

(2) For the purpose of this Subsection, the term "skylight" refers to unit skylights, roof windows and tubular daylighting devices.

(3) Where a wired glass assembly is installed in a required fire separation, it need not conform to the requirements of this Subsection.

(1) Windows, doors and skylights shall conform to the requirements in,

(a) AAMA/WDMA/CSA 101/I.S.2/A440, "NAFS - North American Fenestration Standard/Specification for Windows, Doors, and Skylights", and

(b) CSA A440S1, "Canadian Supplement to AAMA/WDMA/CSA 101/I.S.2/A440, NAFS - North American Fenestration Standard/Specification for Windows, Doors, and Skylights".

(2) Performance grades for windows, doors and skylights shall be selected according to the Canadian Supplement referenced in Clause (1)(b) so as to be appropriate for the conditions and geographic location in which the window, door or skylight will be installed.

(3) Windows, doors and skylights shall conform to the performance grades selected under Sentence (2) when tested in accordance with the standard referenced in Clause (1)(a).

(1) Windows, doors, skylights and their components shall be designed and constructed in accordance with,

(a) Article 5.10.2.2., where they are covered in the scope of the standards listed in Sentence 5.10.2.2.(1), or

(b) Article 5.1.4.1. and Sections 5.4. and 5.6., in other cases.

(1) Windows, doors and skylights shall meet the heat transfer performance requirements in Section 5.3.

(2) Except as provided in Sentence (3), all metal-framed glazed assemblies separating interior conditioned space from interior unconditioned space or exterior space shall incorporate a thermal break to minimize condensation.

(3) Metal-framed glazed assemblies need not comply with Sentence (2) where these assemblies are,

(a) storm windows or doors, or

(b) windows or doors that are required to have a fire-protection rating.

(1) Where exterior insulation finish systems are installed, the systems and their components shall conform to,

(a) Article 5.1.4.1. and Sections 5.3. to 5.6., and

(b) CAN/ULC-S716.1, "Exterior Insulation and Finish Systems (EIFS) - Materials and Systems", if the systems are covered in the scope of that standard.

(1) In this Subsection,

Other fenestration assemblies means curtain walls, window walls, storefronts and glazed architectural structures.

(1) Other fenestration assemblies and their components shall be designed and constructed in accordance with Article 5.1.4.1.

(1) Other fenestration assemblies and their components shall meet the heat transfer performance requirements set out in Section 5.3.

(2) Other fenestration assemblies that are metal-framed and separate interior conditioned space from interior unconditioned space or exterior space shall incorporate a thermal break to minimize condensation.

(1) Other fenestration assemblies and their components shall be designed and constructed in accordance with Section 5.4.

(2) Except as provided in Sentence (3), other fenestration assemblies and their components shall have an air leakage characteristic, measured at an air pressure difference of 75 Pa and tested in accordance with ASTM E283, "Determining Rate of Air Leakage Through Exterior Windows, Curtain Walls, and Doors Under Specified Pressure Differences Across the Specimen", that is not greater than,

(a) 0.2 L/(s•m2) for fixed portions, including any opaque portions, and

(b) 1.5 L/(s•m2) for operable portions.

(3) The following need not comply with Sentence (2):

(a) interior windows and interior doors that do not serve as environmental separators,

(b) vehicular access doors, including garage doors,

(c) storm windows and storm doors,

(d) commercial entrance systems,

(e) revolving doors,

(f) smoke and relief air vents,

(g) site-built door systems, and

(h) commercial steel doors.

(1) Other fenestration assemblies and their components shall be designed and constructed in accordance with Section 5.6.

(2) Except as provided in Sentence (4), other fenestration assemblies and their components shall resist water penetration when tested in accordance with,

(a) ASTM E331, "Water Penetration of Exterior Windows, Skylights, Doors, and Curtain Walls by Uniform Static Air Pressure Difference", or

(b) ASTM E547, "Water Penetration of Exterior Windows, Skylights, Doors, and Curtain Walls by Cyclic Static Air Pressure Difference".

(3) Testing described in Sentence (2) shall be carried out at the driving rain wind pressure as calculated in accordance with CSA A440S1, "Canadian Supplement to AAMA/WDMA/CSA 101/I.S.2/A440-11, NAFS - North American Fenestration Standard/Specification for Windows, Doors, and Skylights".

(4) The following need not comply with Sentence (2):

(a) interior windows and interior doors,

(b) vehicular access doors, including garage doors,

(c) storm windows and storm doors,

(d) commercial entrance systems,

(e) revolving doors,

(f) smoke and relief air vents,

(g) site-built door systems, and

(h) commercial steel doors.