Building Science for Architects Introduction
Building Science for Architects
Introduction
Betsy Pettit, AIA
? 2005 Building Science Corporation
PR-0510a: BuildBoston 2005¡ªBuilding Science for Architects Introduction
Page 1 of 24
Why Do Architects Need to
Understand Building Science?
Q: What is Building Science?
A: The study of heat flow, air flow
and moisture flow through the
building enclosure
? 2005 Building Science Corporation
PR-0510a: BuildBoston 2005¡ªBuilding Science for Architects Introduction
Page 2 of 24
The requirements for our buildings have changed
?
We live in a society where every citizen
deserves healthy, affordable,
comfortable and durable homes and
where the population is steadily
increasing
?
We demand more comfort and control of
our interior environments than we used
to so will not tolerate conditions that we
used to tolerate
?
We have a limited supply of energy
(Hubbard¡¯s Curve) and so we have to
think about energy conservation
? 2005 Building Science Corporation
PR-0510a: BuildBoston 2005¡ªBuilding Science for Architects Introduction
Page 3 of 24
What is different about the way we build today?
?
We have added thermal insulation
?
Tigher Building Assemblies
¨C We have gone from board sheathing to
sheet goods, reducing air leakage into
and out of assemblies
?
We have removed active chimneys and
replaced them with power vented sealed
combustion furnaces.
?
We have become an air conditioning
society (and that requires ducted air
distribution systems)
?
We have more new products to deal with,
and these new products are getting
combined in new ways
? 2005 Building Science Corporation
PR-0510a: BuildBoston 2005¡ªBuilding Science for Architects Introduction
Page 4 of 24
What Happens When Buildings Don¡¯t Work?
? We waste energy
? We waste materials
? People are uncomfortable
? Conditions are unsafe
? Conditions are unhealthy
? Components or systems fail
? 2005 Building Science Corporation
PR-0510a: BuildBoston 2005¡ªBuilding Science for Architects Introduction
Page 5 of 24
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