roofing, exterior wall and waterproofing design issues ......infrastructure and building envelope...
TRANSCRIPT
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Roof, Exterior Wall and Waterproofing Design Issues
+ Construction Defects
BAFAC
May 13, 2003
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Copyright 2020 Allana Buick & Bers, Inc. Roof, Exterior Wall and Waterproofing
Design Issues + Construction Defects
Copyright Materials
This presentation is protected by US and International copyright laws. Reproduction, distribution, display and use of the presentation without
written permission of the speaker is prohibited.
Allana Buick & Bers, Inc. 2020
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Copyright 2020 Allana Buick & Bers, Inc. Roof, Exterior Wall and Waterproofing
Design Issues + Construction Defects
Best Practice
Allana Buick & Bers, Inc. (ABBAE) is a Registered Provider with the American Institute of Architects Continuing Education Systems. Credit earned on completion of this program will be reported to CES Records for AIA members. Certificates of completion for non-AIA members are available on request.
This program is registered with the AIA/CES for continuing professional education. As such, it does not include content that me be deemed or construed to be an approval or endorsement by the AIA of any material of construction or any method or manner of handling, using, distributing, or dealing in any material or product. Questions related to specific materials, methods, and services will be addressed at the conclusion of this presentation.
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Copyright 2020 Allana Buick & Bers, Inc. Roof, Exterior Wall and Waterproofing
Design Issues + Construction Defects
Karim P. Allana, PE, RRC, RWC
• Education: B.S., Civil Engineering, Santa Clara University
• Registration: P.E., Civil Engineering, California, Washington,
Nevada, and Hawaii
• Certification: Registered Roof Consultant (RRC), Roof Consultants
Institute, and Registered Waterproofing Consultant (RWC)
• Overview:
• CEO and Senior Principal at Allana Buick & Bers.
• Former Turner Construction Employee (Project Engineering and Superintendent)
• Over 37 years experience providing superior technical standards in all aspects of building technology and energy efficiency.
• Principal consultant in forensic investigations of building assemblies, failure analysis, evaluation and design of building
infrastructure and building envelope evaluation and design.
• Expert in all aspects of building envelope technology.
• Completed numerous new construction, addition, rehabilitation, remodel and modernization projects for public and private
sector clients.
• Specialization in siding, roofing, cement plaster, wood, water intrusion damage, window assemblies, storefronts, below grade
waterproofing, energy efficiency, solar engineering and complex building envelope and mechanical assemblies.
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Copyright 2020 Allana Buick & Bers, Inc. Roof, Exterior Wall and Waterproofing
Design Issues + Construction Defects
ABBAE Firm Overview
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• Allana Buick & Bers (ABBAE) is an Architectural Engineering firm specializing in Building Envelope Systems
• ABBAE is one of the 5 largest building envelope consultants in the country
• ABBAE has over 33 years of experience & over 12,500 projects
• ABBAE is also a leading Forensic Defect firm with hundreds of forensic projects (litigation)
• Locations – 16 offices across California, Nevada, North Carolina, Oklahoma, Oregon, Texas, Virginia, Washington, Colorado and Hawaii
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Copyright 2020 Allana Buick & Bers, Inc. Roof, Exterior Wall and Waterproofing
Design Issues + Construction Defects
Staff & In-House Expertise
• Licensed Professional Engineers –Civil, Structural, and Mechanical
• Registered Architects
• Building Enclosure Commissioning Process Providers (BECxPs)
• Registered Building Envelope Consultant (RBEC)
• Registered Roofing Consultants (RRCs)
• Registered Waterproofing Consultants (RWCs)
• Registered Exterior Wall Consultant (REWCs)
• Registered Roof Observers (RROs)
• Certified Exterior Insulation and Finish System (EIFS) inspectors
• Curtain Wall Specialists
• ICC Certified Building Inspectors
• Quality Assurance Monitors
• Water Testing Experts
• Leak Investigation and Diagnosis Experts
• Infrared Imaging and Nuclear Moisture Scanning Experts
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Copyright 2020 Allana Buick & Bers, Inc. Roof, Exterior Wall and Waterproofing
Design Issues + Construction Defects
ABBAE Building Expertise
• Building Envelope Systems• Roofing Systems
‾ High-Slope/Low-Slope Roofs
‾ Green/Garden Roofs
‾ Drainage Systems
‾ Pedestrian Plazas
• Exterior Wall Systems
‾ Wall Cladding/Siding/GFRC/pre-cast
‾ EIFS/cement plaster/stucco
‾ Sheet Metal Flashings
• Windows and Glazing Systems
‾ Punched Windows
‾ Curtain Wall/Window Wall Systems
‾ Sliding Glass Doors
‾ Skylights
• Building Envelope Systems (cont’d) • Roofing & Waterproofing Systems
‾ Deck/Balcony/Lanai Waterproofing
‾ Podium Waterproofing
‾ Pool/Spa Deck Waterproofing
‾ Above-Grade/Below-Grade Waterproofing
‾ All types of low and steep sloped roofing
• Commissioning BECx ‾ OPR/BOD/Commissioning Plan
• Mechanical/HVAC Systems • HVAC design
• Plumbing systems
• Commissioning and testing
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Copyright 2020 Allana Buick & Bers, Inc. Roof, Exterior Wall and Waterproofing
Design Issues + Construction Defects
ABBAE Core Services
• Consulting and third-party peer review services
• Engineer of record for building envelope systems
• Contract administration services
• Inspection services (usually direct with owner)
• Air and water performance testing
• Mock-up design, observation, and testing
• Building assessments and forensic investigations
• Litigation support and expert witness services
• Educational seminars with AIA credits
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Copyright 2020 Allana Buick & Bers, Inc. Roof, Exterior Wall and Waterproofing
Design Issues + Construction Defects
• How important good design is, and how important it is to hire a design professional
• About common design defects of roofing systems
• A decision making matrix for selecting roofing materials, that can then be applied to all types of capitol improvement projects:
• Building exterior systems• Sealants • HVAC systems • Waterproofing
You Will Learn…
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Copyright 2020 Allana Buick & Bers, Inc. Roof, Exterior Wall and Waterproofing
Design Issues + Construction Defects
Evaluation Tools
• Every Facility Manager has differing needs and requirements for the building and especially for the roof
• As an example for this decision making tool, we have chosen 7 roofing systems to analyze:
• Built Up (Hot and Cold Process)
• Single Ply
• Foam
• Composition Shingle
• Peel and Stick
• Metal
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Copyright 2020 Allana Buick & Bers, Inc. Roof, Exterior Wall and Waterproofing
Design Issues + Construction Defects
Selection Criterion for roofs
• Low initial installation cost
• Noise, Fumes, other operational issues
• Ease of Maintenance
• Cost of Maintenance
• Energy Efficiency
• Lowest Life Cycle Cost (if installed properly)
• Reliability (Long term proven performance)
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Copyright 2020 Allana Buick & Bers, Inc. Roof, Exterior Wall and Waterproofing
Design Issues + Construction Defects
Crickets are undersized in some
locations, or not provided at all.
Need to be deeper and
redesigned. Note deterioration.
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Copyright 2020 Allana Buick & Bers, Inc. Roof, Exterior Wall and Waterproofing
Design Issues + Construction Defects
Two examples of conduits installation s that were
not designed – installed without proper flashing.
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Copyright 2020 Allana Buick & Bers, Inc. Roof, Exterior Wall and Waterproofing
Design Issues + Construction Defects
An example of a pipe penetration
system that was not designed
properly.
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Copyright 2020 Allana Buick & Bers, Inc. Roof, Exterior Wall and Waterproofing
Design Issues + Construction Defects
Lack of brooming results in poor
adhesion.
In built up roofs, bitumen
is more than just adhesive – it
should flow through pores in
felt, to form a system.
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Copyright 2020 Allana Buick & Bers, Inc. Roof, Exterior Wall and Waterproofing
Design Issues + Construction Defects
a
Base flashings were not surfaced with a protective layer
or cap sheet. Granules on the cap sheet protect the
membrane from UV rays. Base flashings are also
exhibiting signs of deterioration. See photo below.
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Copyright 2020 Allana Buick & Bers, Inc. Roof, Exterior Wall and Waterproofing
Design Issues + Construction Defects
Improper application of
roofing courses
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Copyright 2020 Allana Buick & Bers, Inc. Roof, Exterior Wall and Waterproofing
Design Issues + Construction Defects
Single PlyInstallation
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Copyright 2020 Allana Buick & Bers, Inc. Roof, Exterior Wall and Waterproofing
Design Issues + Construction Defects
Equipment storage on roof
is especially problematical
on single ply
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Copyright 2020 Allana Buick & Bers, Inc. Roof, Exterior Wall and Waterproofing
Design Issues + Construction Defects
Impact damage from dropped
equipment.
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Copyright 2020 Allana Buick & Bers, Inc. Roof, Exterior Wall and Waterproofing
Design Issues + Construction Defects
Equipment supports not integrated
into roof
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Copyright 2020 Allana Buick & Bers, Inc. Roof, Exterior Wall and Waterproofing
Design Issues + Construction Defects
Dropped tool created leak
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Copyright 2020 Allana Buick & Bers, Inc. Roof, Exterior Wall and Waterproofing
Design Issues + Construction Defects
Congested foam roof
FOAM ROOFS
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Copyright 2020 Allana Buick & Bers, Inc. Roof, Exterior Wall and Waterproofing
Design Issues + Construction Defects
Large seam split
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Copyright 2020 Allana Buick & Bers, Inc. Roof, Exterior Wall and Waterproofing
Design Issues + Construction Defects
An example of a serious seam split
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Copyright 2020 Allana Buick & Bers, Inc. Roof, Exterior Wall and Waterproofing
Design Issues + Construction Defects
An example of a premature coating failure – a
persistent problem with foam.
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Copyright 2020 Allana Buick & Bers, Inc. Roof, Exterior Wall and Waterproofing
Design Issues + Construction Defects
Coating has delaminated after only a few years,
exposing the foam to water intrusion.
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Copyright 2020 Allana Buick & Bers, Inc. Roof, Exterior Wall and Waterproofing
Design Issues + Construction Defects
Foam must be properly flashed
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Copyright 2020 Allana Buick & Bers, Inc. Roof, Exterior Wall and Waterproofing
Design Issues + Construction Defects
Composition Shingle
Composition Shingles must match area’s wind
load, or they will fail
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Copyright 2020 Allana Buick & Bers, Inc. Roof, Exterior Wall and Waterproofing
Design Issues + Construction Defects
Problem areas
at chimney
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Copyright 2020 Allana Buick & Bers, Inc. Roof, Exterior Wall and Waterproofing
Design Issues + Construction Defects
Peel and Stick
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Copyright 2020 Allana Buick & Bers, Inc. Roof, Exterior Wall and Waterproofing
Design Issues + Construction Defects
Industrial Metal Roofs
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Copyright 2020 Allana Buick & Bers, Inc. Roof, Exterior Wall and Waterproofing
Design Issues + Construction Defects
Improper design leads to
Failures
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