During the restoration of a clock tower in Huntsville, Ont., the contractor uncovered significant deterioration within the multi-wythe clay brick exterior walls. The project was expanded to include: demolition of the deteriorated brick walls, reconstruction of the tower walls one corner at a time, replacement of the steel roof, and recladding of the tower exterior walls.
Owners, engineers, and contractors involved in the design, operation, maintenance, and restoration of parking garages and building podium decks need to understand the role and importance of waterproofing systems in protecting these facilities.
Proper waterproofing of construction joints plays a vital role in fortifying below-grade concrete structures. Construction joints are stopping places—caused by non-continuous concrete pour—and a plane of weakness.
The Vancouver Island Chapter of CSC will hold a lunch presentation on “Next Generation Bathrooms” at Fireside Grill on April 12. Maria Rudman (Schluter Systems Canada) will lead the discussion.
Is water penetration in the below-grade structure an inevitable phenomenon? Not anymore. Shop drawings are proving extensive design, coupled with project-specific information, can help turn the tide.
For more than two millennia, asphalt bitumen has been used as a key raw component in the construction industry. Long before the first oil refinery produced its first barrel of asphalt, builders and waterproofers used natural sources of asphalt for various applications.
Apart from mechanical damage, water ingress is the most detrimental force to concrete structures. Buildings the world over are failing far earlier than construction designers had planned. In some cases, this results in high maintenance costs unforeseen by building owners.
Hawkesbury District & General Hospital (HGH), located halfway between Ottawa and Montréal, is in the midst of an ambitious long-term construction project, first submitted to the Ontario Health Ministry in 2007. The project features a pair of three-storey additions with basements, to be appended to the existing hospital. However, it needed to first overcome certain waterproofing challenges.
An ASTM International committee, D08 on Roofing and Waterproofing, is developing a standard for two asphalt products that will help reduce air emissions, save energy, and benefit workers by lowering their exposure to asphalt fumes.
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