Design professionals often work in isolation, with each discipline (architectural, structural, mechanical, and electrical) doing their own thing and only getting together after they have completed most of their individual design contribution to co-ordinate dimensions. Crucial data is unintentionally missed, and this can significantly affect the structural design of roof systems.
Roofs, and particularly flat ones, face unique issues when dealing with sudden downpours. Builders are discovering sprayed polyurethane foam (SPF) can contend with the ‘new normal’ extreme weather that is being witnessed.
An Ontario project received an honourable mention at the Asphalt Roofing Manufacturers Association’s (ARMA’s) annual Quality Asphalt Roofing Case-study (QARC) Awards. Al Anthony Roofing of Consecon, Ont., was recognized for its church roof installation at Closson Chase Winery in the neighbouring village of Hillier in Prince Edward County.
For commercial buildings, membrane roof systems can serve as part of an air barrier system. While this is common practice, questions still arise on how to design, specify, and install an effective air barrier system.
Today’s low-slope roofs offer an economical and sustainable platform for renewable solar energy in the form of photovoltaic (PV) systems. However, some roof systems may lack the durability and strength to remain sustainable over the long term.
Without a properly engineered ventilation system on the roof, ice-damming can threaten a building’s health. An ice dam is a ridge of ice forming at the eaves of a roof, cricket, or valley that prevents melting snow and water from draining off. The water backing up behind this obstruction can refreeze, creating an ice dam. These dams can be the cause of roof failures; once significant amounts of moisture enter the building, there is a high probability mould and other negative impacts can occur.
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