radon and bc building code and bc building code... · radon and bc building code prepared by mo...
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RADON AND BC BUILDING CODE
Prepared by Mo Bayat
March 2015
Change from 2012 to 2014
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protection of radon
infiltration into habitable
space of only residential
buildings was the focus of
the code requirements
(poly, overlap, seal around
penetration …..)
1992, 1998 & 2006 BCBC
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In both Canada & US, radon
industry and activists including EPA,
Health Canada, provincial Health
Ministries and Lung Associations
through further research, testing,
mapping, public awareness and
education changed the code
requirements.
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First time BCBC mandated
radon-ready rough-in
installation for preparation
of subfloor
depressurization system
between air barrier and the
ground for all residential
occupancy.
BCBC 2012 9.13.4.3
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Exempts other occupancies if
intended to be occupied on
average for less than 4 hours
within 24 hours period .
BCBC 9.13.4.2(3)
Floor-on-ground shall provide a rough-in
subfloor depressurization consisting of
a) a gas permeable layer with inlet and
an outlet, or (performance)
b) 4” clean granular material and a pipe
(prescriptive)
BCBC 9.13.4.3
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Configurations for radon
rough-in opening
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Construction Site
radon rough-in opening
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Construction Site
radon pipe & rough-in
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Table C-3 BCBC
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City of Kelowna
BC Lung Association
Canadian Home Builders Association
(CHBA)
Local radon industry (designers,
mitigators …)
Health Canada & IHA, EPA ………..
presented a proposed change to
building safety and policy branch
Partnership in 2013:
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Risk management
Sensitivity to increase cost of
construction
Proposal:
Extend the pipe (radon ready)
through the roof
Balanced approach:
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Develop passive depressurization
Reduce the radon between 40%
to 50% just by chimney effect
without installing a fan in pipe
Benefit of extension
Rationale
Risk of caped pipe:
mechanical damage
Connection can be mistaken as
sewer pipe
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2014 Amendment for Radon
Radon vent pipe:
Minimum 100mm in diameter,
To terminate minimum:
a) 1.0m above any air inlet, door or
openable window.
b) 2.0m above a roof that supports an
occupancy.
c) Shielded from weather & frost
d) 1.8m from a property line.
Label “RADON VENT PIPE” at every 1.2m
and at every change in direction.
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2014 Amendment for Radon
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Thank you
Any Questions?