The building envelope can consist of various types of wall systems which require proper maintenance to prevent water penetration and further damages to the main structural components.
Concrete Shear Wall System
Repair work or maintenance to vertical wall concrete surfaces throughout the building envelope are often a result of continuous moisture penetration, effecting further corrosion of embedded reinforcement and steel rebar. This condition leads to spalling and cracking of the concrete. If ignored, deterioration of the concrete can worsen and spread.
Masonry Brick/Stone Wall System
Isolated brick replacement or through wall flashing repairs are two common repairs identified in high rise buildings. Masonry components are affected overtime by continuous water penetration and migration or as a result of defective metal flashing or windows sills. This work will require removal of deteriorated brick or stone and replacement with new masonry. Tuck pointing of cracked mortar joints, blue skin or new sealant and sealer application are typically included in the specifications for this work.
Concrete repair work and waterproofing are two items that require inspection and maintenance on an annual basis due to susceptibility of water damage and migration in these structures. High traffic vehicular ramps equipped with heating systems can also be installed to avoid ice accumulation during extreme weather conditions.
Elevated Garage Deck
These independent structures serve as primary or secondary parking garage for residential and commercial use. Due to significant exposure to the elements, repair and maintenance should be implemented frequently to avoid major repairs. Waterproofing the top deck is critical as water penetration from this area can affect all suspended slabs situated below and lead to additional cost for remediation. Waterproofing protection in the form of thin system or hot applied rubberized asphalt will help prevent of failure in other structural components.
Concrete & Interlocking:
This architecturally favored finish for landscape design can be combined with other soft finish materials to achieve a cosmetically pleasing appearance. Interlocking stone can be supplied and installed in various sizes, patterns, colors and borders while offering a reliable hard surface that does not require ongoing maintenance when installed correctly with adequate sub-grade compaction. Application of this material is labor intensive which often is associated with increased cost when compared with other landscaping products and finishing materials.
Similar to most municipalities and commercial/industrial owned properties, privately owned multi-residential properties incorporate concrete walkways and sidewalks as common access for residents and those with special requirements such as wheelchair ramps. Different finishes in a variety of styles are available. This low maintenance application captures both durability and cost effectiveness, making it one of the most commonly used systems for walkways in landscaping.
This waterproofing system has gained popularity over the past years and is most commonly used for balconies, underground garages as well as concrete stairs. Due to the high adhesion quality and two components (base/top) rather than basic application, this system is effective in providing concrete protection against water migration for extended period of years with proper maintenance program in place. The application of this material requires a dry concrete surface with no or minimal moisture content to achieve a good bond. Incorporation of silica sand in the top coat provides slip resistance to the rubberized waterproofing coating.
Hot Applied Rubberized Asphalt
This method of waterproofing is commonly used for garage decks, bridges as well as roofing systems. The multi-layer application is preferably reinforced with fibreglass mesh to allow for movement without the occurrence of cracks which can lead to premature failure and further water penetration. Protection board is installed over the new waterproofing membrane to provide an additional layer of protection prior to reinstatement of the overburden and other finishing items. Metal flashing work is to be performed at wall upturns complete with new sealant to minimize weather impact (snow, ice, UV, etc.) upon completion of this work.
This component acts as a primary seal for both water penetration as well as thermal barrier for active leakage. When applying new sealant (caulking), complete removal of existing sealant is required followed by surface preparation and cleaning of the joints.
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