Licensed Architect - Summer 2017 - 32

Second Chances for Buildings

Lose-fitting and displaced insulation in attic.

were presented: (A) Install insulation
beneath the metal deck and salvage
the recently installed roofing, or (B)
Install a new system of insulation, air
and vapor barriers on the exterior,
and replace the roofing. Since the
work could be limited to the addition,
Option A was selected so that the
two-year old roof, which matched the
remaining building, could be retained.
Option A utilized a closed-cell spray
polyurethane foam (SPF) insulation
on the interior face of the metal
decking. An SPF product with an
integral fire retardant that satisfied
the ASTM E84 and UL 1715 testing
criteria was used to satisfy IBC
requirements for ignition and thermal
barriers. This insulation was installed
in two layers to encase the truss top
chords and control potential thermal
bridges. Using THERM software,
two-dimensional computer models
SPF Installation partially completed.

32 | Licensed Architect | Summer 2017

THERM model with temperature gradient across insulated truss.

of the assembly were evaluated
to identify temperature gradients
and condensation potential while
assessing insulation coverage.
In addition, component additive
methods were used in conjunction
with THERM to demonstrate that
the resulting R value satisfied the
IECC requirements for the assembly.
Available fire-test data for the SPF
did not include configurations
with continuous SPF installed with
horizontal-to-vertical transitions.
Consequently, an alternate materials
(foil-faced mineral wool) insulation
were used at wall transitions.
In summary, this building
demonstrates how water damage
initially attributed to moisture
infiltration proved to be primarily from
internal sources. A more complete
understanding of the building systems
is required when assessing issues

and developing repair approaches.
Reviewing building systems and
repair needs should include seasonal
monitoring. Moisture sources are not
only from the exterior, and evaluating
the efficacy of envelope control
layers should be included with
these assessments.
Timothy Crowe, ALA, SE, PE, an
Associate Principal with WJE in
Northbrook, Illinois, is Co-chair of
the Association for Preservation
Technology International (APT)
Preservation Engineering Technical
Committee and specializes in the
investigation, and repair of archaic
and contemporary structures. He
can be reached at tcrowe@wje.com.
Andi Mele, EIT is an intern engineer
with WJE that specializes in the
assessment of building envelopes
and cladding. He can be reached at
Amele@wje.com.

Ceiling reinstallation without the fiberglass insulation.



Table of Contents for the Digital Edition of Licensed Architect - Summer 2017

President’s Message
ADA Advice Accessibility: Handrail Details for Stairways and Ramps
Continuing Education A Review of Window, Door and Skylight Standards and Certification
Buyer’s Guide
Feature Article The Necessary Accessory: Hardware
Continuing Education Providers/ ALA New Members
Insurance Design Professionals and Cyber Risk - Part 2
Second Chances for Buildings The New Roof is Still Leaking?
Feature Article What Do Clients Want? Amenities, style and function
Firm Management Tools for Small Firms: Time Management
Index of Advertisers
Licensed Architect - Summer 2017 - Intro
Licensed Architect - Summer 2017 - cover1
Licensed Architect - Summer 2017 - cover2
Licensed Architect - Summer 2017 - 3
Licensed Architect - Summer 2017 - 4
Licensed Architect - Summer 2017 - 5
Licensed Architect - Summer 2017 - President’s Message
Licensed Architect - Summer 2017 - 7
Licensed Architect - Summer 2017 - ADA Advice Accessibility: Handrail Details for Stairways and Ramps
Licensed Architect - Summer 2017 - 9
Licensed Architect - Summer 2017 - 10
Licensed Architect - Summer 2017 - 11
Licensed Architect - Summer 2017 - 12
Licensed Architect - Summer 2017 - 13
Licensed Architect - Summer 2017 - 14
Licensed Architect - Summer 2017 - 15
Licensed Architect - Summer 2017 - Continuing Education A Review of Window, Door and Skylight Standards and Certification
Licensed Architect - Summer 2017 - 17
Licensed Architect - Summer 2017 - 18
Licensed Architect - Summer 2017 - 19
Licensed Architect - Summer 2017 - 20
Licensed Architect - Summer 2017 - Buyer’s Guide
Licensed Architect - Summer 2017 - 22
Licensed Architect - Summer 2017 - 23
Licensed Architect - Summer 2017 - 24
Licensed Architect - Summer 2017 - Feature Article The Necessary Accessory: Hardware
Licensed Architect - Summer 2017 - Continuing Education Providers/ ALA New Members
Licensed Architect - Summer 2017 - Insurance Design Professionals and Cyber Risk - Part 2
Licensed Architect - Summer 2017 - 28
Licensed Architect - Summer 2017 - 29
Licensed Architect - Summer 2017 - Second Chances for Buildings The New Roof is Still Leaking?
Licensed Architect - Summer 2017 - 31
Licensed Architect - Summer 2017 - 32
Licensed Architect - Summer 2017 - Feature Article What Do Clients Want? Amenities, style and function
Licensed Architect - Summer 2017 - 34
Licensed Architect - Summer 2017 - 35
Licensed Architect - Summer 2017 - Firm Management Tools for Small Firms: Time Management
Licensed Architect - Summer 2017 - 37
Licensed Architect - Summer 2017 - Index of Advertisers
Licensed Architect - Summer 2017 - cover3
Licensed Architect - Summer 2017 - cover4
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