NBC 2015 - Section 9.25 - 01
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Questions and Answers

Which standard specifies the thermal insulation material 'Phenolic, Faced'?

  • CAN/ULC-S701
  • CAN/ULC-S703
  • CGSB 51-GP-27M (correct)
  • CAN/ULC-S702
  • Which type of insulation should be used in areas where it may be subject to mechanical damage?

  • Cellulose Fibre Insulation
  • Polyurethane and Polyisocyanurate Boards (correct)
  • Mineral Fibre Thermal Insulation
  • Wood Fibre Insulating Boards
  • Where should loose-fill insulation be used?

  • In wood-frame walls of existing buildings
  • On sloped ceilings only
  • Between the outer and inner wythes of masonry cavity walls
  • On horizontal surfaces only (correct)
  • What is the maximum supporting slope for loose-fill insulation in an unconfined sloped space?

    <p>2.5 in 12</p> Signup and view all the answers

    What should be done to prevent loose-fill insulation from blocking soffit vents?

    <p>Maintain an open path for circulation of air from the vents</p> Signup and view all the answers

    What standard should be followed for the installation of spray-applied polyurethane insulation?

    <p>CAN/ULC-S705</p> Signup and view all the answers

    According to the National Building Code of Canada 2015, where should the insulation be installed?

    <p>On the warm face of the assembly</p> Signup and view all the answers

    What is the minimum ratio of total thermal resistance outboard of a material's inner surface to total thermal resistance inboard of that surface, for a ratio between 5,000 and 5,999?

    <p>0.30</p> Signup and view all the answers

    In order for a wall to have an air space vented to the outdoors, what condition must it comply with?

    <p>Clause 9.27.2.2.(1)(a)</p> Signup and view all the answers

    What is the minimum ratio of total thermal resistance outboard of a material's inner surface to total thermal resistance inboard of that surface, for a ratio between 10,000 and 10,999?

    <p>0.65</p> Signup and view all the answers

    Where should the insulation be installed if the ratio between the total thermal resistance outboard of its innermost impermeable surface and the total thermal resistance inboard of that surface is not less than that required by Table 9.25.5.2?

    <p>On the warm face of the assembly</p> Signup and view all the answers

    According to the National Building Code of Canada 2015, where should the insulation be installed if it is outboard of an air space that is vented to the outdoors?

    <p>On the exterior of the building</p> Signup and view all the answers

    Which of the following is a requirement for the installation of an air barrier below a floor-on-ground?

    <p>The air barrier must be lapped at least 200 mm.</p> Signup and view all the answers

    What is the maximum permeance allowed for vapour barriers?

    <p>60 ng/(Pa·s·m2)</p> Signup and view all the answers

    Which material can be used as a vapour barrier?

    <p>Polyethylene sheet</p> Signup and view all the answers

    What is the purpose of installing the vapour barrier close to the warm side of the insulation?

    <p>To prevent condensation at design conditions</p> Signup and view all the answers

    Which of the following materials does not need to comply with the requirements for sheet and panel-type materials in the building envelope?

    <p>Wood-based sheathing materials</p> Signup and view all the answers

    Under what conditions does an assembly not need to comply with the requirements for low permeance materials?

    <p>When the assembly is located in a region with heating degree-days less than 6000</p> Signup and view all the answers

    Which type of assemblies separating conditioned space from unconditioned space or from the ground are required to include an air barrier system?

    <p>All of the above</p> Signup and view all the answers

    Which of the following is NOT a requirement for the air barrier system in wall, floor, attic, or roof spaces according to the National Building Code of Canada 2015?

    <p>Ensuring comfortable conditions for the occupants</p> Signup and view all the answers

    Which type of material is required to be used as an air barrier system in the National Building Code of Canada 2015?

    <p>Polyethylene sheet</p> Signup and view all the answers

    Which of the following statements about the continuity of the air barrier system is correct according to the National Building Code of Canada 2015?

    <p>Interior walls should extend across the intersection with exterior walls, ceilings, floors, or roofs</p> Signup and view all the answers

    What should be done to maintain the integrity of the air barrier system when there are penetrations such as doors, windows, electrical wiring, or piping?

    <p>Seal the penetrations with noncombustible material</p> Signup and view all the answers

    What should be done to seal clearances between chimneys or gas vents and the surrounding construction according to the National Building Code of Canada 2015?

    <p>Seal them with noncombustible material</p> Signup and view all the answers

    Which of the following measures are required for walls, ceilings, and floors separating conditioned space from unconditioned space, exterior air, or the ground?

    <p>Thermal insulation, air barrier, and vapour barrier</p> Signup and view all the answers

    What should be the relative position of materials in walls, ceilings, and floors separating conditioned space from unconditioned space, exterior air, or the ground?

    <p>Conform to Subsection 9.25.5.</p> Signup and view all the answers

    Which sections should be followed for insulation and sealing of heating and ventilating ducts?

    <p>Sections 9.32., 9.33., and 9.36.</p> Signup and view all the answers

    What is the purpose of thermal insulation in walls, ceilings, and floors separating heated space from unheated space, exterior air, or exterior soil?

    <p>To prevent moisture condensation and ensure comfortable conditions</p> Signup and view all the answers

    Which insulation material is required for thermal insulation?

    <p>ASTM C 726, 'Mineral Wool Roof Insulation Board'</p> Signup and view all the answers

    What is the scope of Section 9.25?

    <p>Heat, air, and water vapor transfer, and measures to control condensation</p> Signup and view all the answers

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