Cladding related problems have become increasingly apparent over the last decade. The harsh winter climate combined with the introduction of pressurization and humidification of buildings creates the potential to induce considerable moisture deposition into wall systems. Unfortunately, wind-driven rain penetration into wall systems is also a major contributing element to building envelope duress. It is not always clear as to the source of the water, as it could be condensation and/or precipitation penetration.

Assessment and Rehabilitation
We have experience in both the assessment and rehabilitation design of all types of cladding systems, including stone, concrete, clay brick, metal, and EIFS. All cladding types have unique patterns of duress which require investigative techniques tailored to both the cladding system type and the structural support.

Diagnosing the source or cause of the cladding duress can often prove to be complex due to the number of variables involved. For example, the mechanical system operation of the building can provide a pivotal role in aggravating moisture accumulation into the wall system. We therefore rely on both conventional and non-conventional techniques.

In addition to the investigative techniques listed under Assessment, Crosier Kilgour & Partners have the expertise to measure the pressure differential across the wall system, including the actual pressure on the cladding under gust conditions. In that regard, the most air-tight component of the wall can be determined in addition to quantitatively confirming whether the building is operating at positive or negative pressure.

Health Concerns
In addition to inducing cladding duress, such as spalling and dislodgement, water penetration into a building wall system can lead to significant health related concerns such as promoting the growth of toxigenic mould. Thus, any uncontrolled moisture penetration into wall systems warrants investigation to prevent the development of deterioration to the wall system and the development of any health concerns.

The knowledge possessed by Crosier Kilgour & Partners through its extensive experience in building envelope investigations and restoration, is being increasingly used by other professionals in the design of new buildings, particularly due to the relatively stringent requirements of Part 5 of the National Building Code. Computer modeling of wall systems for condensation potential combined with our field experience is utilized to design state-of-the-art pressure equalized rain screen systems. Precipitation management strategies, that don't merely rely on caulking, are incorporated to provide a long-term effective design.