James D Cummins - PowerPoint PPT Presentation

1 / 13
About This Presentation
Title:

James D Cummins

Description:

When examining the construction industry today, the area of roofing stands out ... vapor retarders, membrane and flashing materials, used in countless combinations ... – PowerPoint PPT presentation

Number of Views:76
Avg rating:3.0/5.0
Slides: 14
Provided by: SDA
Category:

less

Transcript and Presenter's Notes

Title: James D Cummins


1
James D Cummins Company
Building Systems Consultants
  • Introduction to a Roof Management Program

2
Why do you need a Roof Management Program?
  • The roof is the only portion of the building that
    requires major rehabilitation periodically.
  • When examining the construction industry today,
    the area of roofing stands out above all others
    as being more problematic in quality of
    craftsmanship, material performance, and the
    total design system.
  • The volume of low-sloped roofing alone annually
    installed in the United States totals about 3
    billion square feet, enough to cover most large
    cities nearly twice.
  • Of this vast volume, 4 to 5 percent fail
    prematurely, according to surveys conducted for a
    National Bureau of Standards report.
  • This same report notes that some industry experts
    estimate a still higher failure rate.
  • Regardless of the precise percentage, roofing
    failures constitute a major problem and a huge
    economic burden on building owners plagued with
    the high costs for repairs or tear-off
    replacement.

3
Premature Roofing Failures are Caused by Economic
and Technical Factors
  • Economically, a buildings roof system normally
    lags far behind the more architecturally
    glamorous building subsystems competing for the
    building owners money. Penny-wise,
    dollar-foolish decisions underlie many premature
    roofing failures.
  • Technically, some of the factors contributing to
    premature roof failures can be listed as follows
  • The extraordinary rigors of roof performance
    requirements
  • Proliferation of new materials
  • Complexity of roof system designs
  • Expanding roof dimensions
  • Field applications problems
  • The modern trend toward more flexible buildings

4
Roofs Must Withstand a Much Broader Attack from
Natural Forces than Other Building Components
  • In some parts of the continental United States,
    roof surfaces experience annual temperature
    changes exceeding 200 degrees F and daily changes
    exceed 100 degrees F. These temperature changes
    can occur rapidly, as when a summer shower
    suddenly cools the sun-baked membrane surface.
    Solar radiation heats the roof to extraordinary
    temperatures, up to 180 degrees F for black
    surfaces. This heat greatly accelerates
    photochemical deterioration. Rain, snow, sleet
    and hailstones pound the roof acid mists and
    other airborne pollutants even fungus attack
    the roof.

5
New decks, insulation, vapor retarders, membrane
and flashing materials, used in countless
combinations has complicated the
field-manufacturing process and the designers
job of evaluating durability.Until a material
has been field tested in service, its durability
remains highly unpredictable. Accelerated
laboratory tests are better than nothing, but
in-service performance is essential for proving a
materials durability. Some materials enter the
roofing market lacking even laboratory testing.
Proliferation of New Roof Materials

6
Many Materials are Satisfactory in Themselves,
but Prove Disastrous When Incorporated With Others
  • Incompatible materials in built-up roof systems.
    Insulation generally raises the probability of
    condensation entrapment within the roofing
    system. The threat of condensation entrapment in
    turn creates the possible need for another roof
    component, a vapor retarder designed to intercept
    the flow of water vapor into the insulation,
    where it can cause membrane ridging, aggravated
    blistering, and destruction of the insulation
    itself. The vapor retarder may create the need
    for venting the insulation. And so it goes, with
    each solution creating its own sub-problems.

7
Roof Designers Must Never Consider a Component in
Isolation
  • Roof Designers must always investigate the
    compatibility of all components with other
    materials and its effects on the whole system.
  • Far more important than the quality of the
    individual materials, are their design and
    installation as compatible components of an
    integrated system.

8
Roofing Industry Lags in the Promulgation of
Installation Standards and Test Methods
  • Instead of focusing on the whole field
    manufactured roof system, the true guide to
    roofing system performance, the industry has
    concentrated on the component-material quality.
  • Except for the fire and wind up-lift resistance,
    there are no generally accepted tests for
    performance of the entire built-up roof system
    assembly from these components.

9
We Oversee the Demise of the Old Roof as well as
the Specification of a New Roof
  • As a consultant, we serve as both the
    pediatrician and the undertaker.
  • In this role, we are now beginning to receive
    ample opportunity to develop programs to improve
    the inventory of thousands of square miles of
    roof.
  • With you, the building caretakers working with
    us, we should be able to achieve our goals of
    improving the life and performance of your roofs.

10
Benefits of a Planned Roof Program
  • Identify, define, and prioritize your roofing
    needs.
  • Establish your work scope.
  • Eliminate crisis roof management and risks.
  • Create your long-term plan of action.
  • Maintain and upgrade your roof needs annually.
  • Improve the overall protection of your roofs
    through a scheduled, defined, and itemized
    maintenance needs program.

11
  • Reduce your roof maintenance cost through
    accurate repair identification methods.
  • Reduce your overall life cycle costs and extend
    roof service life.
  • Provide a management tool for
  • justification of action
  • short and long-term budgeting
  • asset improvements
  • The program pays for itself, therefore, it saves
    money.

12
Development of a Roof Management Program must
include
  • Roof management philosophy, program roles, and
    responsibilities.
  • Setting up a roofing database.
  • Inspecting and rating the relative condition of
    all roofs and the decision making process of
    repair versus re-roof.
  • Detailed step-by-step procedures for repair and
    replacement.
  • Quality assurance controls and inspections for
    on-going projects.
  • On-going training programs and on-going roof
    sections.

13
James D. Cummins Company
Building Systems Consultants
Write a Comment
User Comments (0)
About PowerShow.com