Choosing An Inspector
House as a System
All IHD practice is based on the
house-as-a-system concept. Years of R2000
training/practice, experience with multiple building
component/component groupings, the study of local historical
building practices and continuous monitoring of changes in building
science all point IHD to HAAS as the best guiding principle.
The HAAS concept was developed concurrently by building scientists
and practitioners to advance the notion of the ecology or
interrelated-ness of all building intentions, components and
processes. A well-balanced condition survey based on this concept
allows the connecting of dots from a visual survey to often surpass
time-challenged information from sophisticated instrumentation.
The common example used involves the sealing up of older, drafty
houses in heating climates without necessary ventilation strategy
adjustments. This regularly lays the foundation for
life-safety/health risks and serious indoor air quality problems
[and we are told 30+ % of North Americans suffer from respiratory
allergies or asthma].
The misunderstanding of how buildings actually work means that even
buildings with capabilities for better comfort and air quality,
longer envelope life and higher seismic resilience are often not
achieving these because homeowners are not shown how to optimize
their homes’ potential.
HAAS as a product of building science provides a universal lens
through which buildings in varying microclimates or regulatory
jurisdictions can be examined , thus giving a better idea about how
any building will respond to its particular external environment and
how this will impact life safety, human health, comfort and
Because it meaningfully contextualizes era of construction, code
evolution and material aging issues it also supplies more security
about long term suitability to purpose and variance in maintenance
Independent House Diagnosis (1976) Ltd.
White Rock, British Columbia
Serving the Lower Mainland specializing in White Rock, Surrey, Langley and