B20−Exterior Vertical Enclosures

Condensation on curtain wall surfaces: An investigation

December 28, 2018

In cold climates, condensation-resistance performance is expected for standard curtain wall systems. However, occupancy factors, unconventional building geometry, design details, and the design of heating systems and interior finishes may result in the reduction of condensation resistance, as demonstrated by a case study of a 12-storey commercial building in Montréal.

Leveraging energy efficiency to finance HVAC system retrofits

December 28, 2018

The Québec City University Hospital Centre (CHU) de Québec – Université Laval opted for a deep retrofit project when addressing a backlog of deferred maintenance. Energy-efficiency upgrades at four of the centre’s hospitals included boiler replacements, improvements to the thermal plants, and reconfiguration of numerous electromechanical systems.

Thermal breaks prevent heat loss

December 27, 2018

Structural thermal breaks (STBs) address thermal weaknesses in the building envelope by ensuring continuous insulation (ci), thereby improving the overall thermal performance. They are also changing the design philosophy to an “envelope-first approach.”

Vapour diffusion and condensation control for commercial wall assemblies

December 20, 2018

The proper selection and placement of vapour-impermeable materials within wall assemblies is fundamental to their durability in both cold and warm climates. Failure to correctly account for the impacts of vapour diffusion can lead to damage and premature failure of wall assemblies.

Do raked joints affect the fire resistance of concrete masonry?

December 20, 2018

Raked joints are commonly used in masonry walls for esthetic purposes. A widespread opinion is they reduce the fire resistance of concrete masonry. However, full-scale experimental tests and numerical studies have now found the fire resistance of walls does not greatly depend on the thickness of the mortar.

How to install locks on barn-style doors

December 18, 2018

Barn doors combine old-world charm with spatial efficiency, and now privacy locks have made these doors more attractive. This author has outlined five steps to help door hardware installers transform a beautiful and trend-setting door into a truly functional privacy solution.

How to stop: Parapet and soffit construction solutions

December 16, 2018

Detailing parapet and soffit assemblies requires an understanding of structural building movement and, thermal performance requirements, air control, material limitations, and construction technologies, along with trade co-ordination.

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