Protected Membrane Roof System - LightGUARD

LIGHTGUARD ©

&
CTI©
Concrete Topped Insulated
PMR SYSTEM
USA & Canada

LIGHTGUARD©
• T.CLEAR LIGHTGUARD© was
developed over 34 years ago as an
evolvement of the ballasted IRMA for
Dow Chemical (Protected Membrane
Roof).
•The system was developed as
a lightweight system (4.5lbs per sq.ft.)
for roof membrane protection.

LIGHTGUARD ©

by T.Clear Corp.
•STYROFOAM© (extruded polystyrene)
•3/8 inch latex-modified extruded concrete
topping
It is walking surface and ballast all in-one

•Tongue and Groove edges for wind resistance
thermal efficiency and ease of installation.
• LIGHTGUARD© Protects membrane from ultra-
violet rays, physical abuse, and thermal swings.

1/1/07

Attributes Value Test
Extruded Polystyrene Type VI ASTM C 578-92
Tongue & Groove Long Edge
Latex Modified Concrete Face 3/8” (10 mm)
Finished Overall Dimensions 24” Wide (610 mm)
48” long (1219 mm)
2.375” thick (61 mm) for 2” foam

Weight 4.5 lbs/ft.2 (22 kg/m2)
R Value 5 per inch of foam ASTM C 518-91
(0.03m.K/W per mm)
Thermal Conductivity 0.2
Compressive Strength 40 lbs./in2 (275.6 kPa) ASTM D 1621-79
Point Loading (1” x 1”) 450 lbs./in2 (275.6 kPa)
Water Absorption < 0.1 ASTM D 2842-90
2” Steel Ball Drop Slight Indentations FM4470
< 0.05 (1.3 mm)
Freeze/Thaw 750 cycles ASTM C 666 “B”-92
Permeability 0.8 ASTM E 96-95

1/1/07

48” long (1219 mm)
2.938” thick (75.5 mm) for 2” foam
Weight 11 lbs/ft.2 (54 kg/m2)
(0.03m.K/W per mm)
Compressive Strength 40 lbs./in2 (3101 kPa) ASTM D 1621-79
Point Loading (1” x 1”) 1300 lbs./in2 (8958 kPa)
2” Steel Ball Drop 700 ft. lbd (952 J) FM4470
< 0.05 (1.3 mm)

1/1/07

48” long (1219 mm)
Weight 4.5 lbs/ft.2 (22 kg/m2)
(0.03m.K/W per mm)
Compressive Strength 40 lbs./in2 (3101 kPa) ASTM D 1621-79
Point Loading (1” x 1”) 450 lbs./in2 (275.6 kPa)
2” Steel Ball Drop Slight Indentations FM4470
< 0.05 (1.3 mm)
Thermal Emittance 94 ASTM E 408
Reflectivity Initial 84/Aged 65

PROTECTED MEMBRANE ROOF

Production
Produced in Hamilton, Ohio
Automated Production Process
Certified by UL Laboratories


PMR: Layer by Layer
Placing the insulation
above the membrane
protects the membrane
from the damaging
stresses that a roof can
LIGHTGUARD© or
experience. CTI © Roof Panels

Membrane

Deck

3” LIGHTGUARD©
Durham Detention Center,
Durham, NC


An Idea Waiting to Happen
After Dow invented an insulation durable enough to withstand
exposure to the environment, the “upside down” concept
needed a hard surface that still could give:

Excellent moisture resistance Membrane protection capability
Superior long-term R-value (against weathering, physical
abuse, and hail damage)
Exceptional durability, which Ability to maintain the membrane
extends the life of the roof at a relatively constant
or plaza temperature


TCLEAR Benefits
LIGHTGUARD© helps to
©

maintain the roof
membrane at a relatively
constant temperature,
minimizing stress from
freeze-thaw cycling and
excessive heat

The blue area represents the relatively
constant temperature of a protected
membrane. The yellow area
represents the temperature fluctuation
of a conventional roof’s membrane.


TCLEAR Benefits
LIGHTGUARD© protects the roof membrane from
weathering, damage, foot traffic and other physical
abuse (both during and after construction).
This allows year-round construction since roof is
waterproofed first, then insulated.
LIGHTGUARD© permits
easy removal and re-
installation of ballast
and insulation (for
repairs or additional
construction)

Durability! Don’t try this with a gravel ballasted roof.


TCLEAR Benefits
LIGHTGUARD©
Compatible with a wide range of ballast
options and membrane types
Provides excellent moisture resistance
and stable long-term R-value
Offers exceptional durability to extend life
of plaza or roof
Reduces repair expenditures

CONVENTIONAL ROOF ASSEMBLY PROTECTED MEMBRANE ROOF

Life Cycle
Conventional roof: TCLEAR LIGHTGUARD©:
Lasts approximately 10 years Lasts approximately 25 to 30 years
or more
Gravel Ballast may blow off or
shift Reduces the frequency of
High cost of tear-off tear-offs
Costs related to disposal of Insulation can be reused,
materials in landfill avoiding landfill fees and
replacement product cost

Duke University Hospital
Heliport Roof, Durham, N.C

Duke University Hospital’s commitment to go “green” in its 2007 heliport roof replacement project
has won a national award for environmental stewardship and design excellence.

The Washington, D.C.-based Center for Environmental Innovation in Roofing presented the award
during the 2009 International Roofing Expo held Feb. 3-5 in Las Vegas.

“Duke Medicine is striving to be environmentally responsible in the construction and operation of
our facilities,” says Robert Guerry, director of Medical Center Engineering and Operations. “We
hope the positive outcome of the heliport roof sets the stage for further success, as we plan
future hospital facilities.”

Center Executive Director Craig Silvertooth said the Duke Hospital roof project illustrates
perfectly the intent of the center’s 2009 Excellence in Design awards program. “The environmental
and economic benefit of forward-thinking roof design can be very significant, as demonstrated by
the Duke Hospital project,” Silvertooth said.

Go “Green”

The numerous “green” outcomes of the Duke Hospital helipad project included:

• 718 tons of solid construction waste diverted from the landfill
(and $29,797 in landfill dumping fees were avoided).

• 430 tons of roof ballast stone recycled in Duke Forest for road stabilization.

• 2,120 miles of dump truck/landfill travel avoided (and 265 gallons of fuel spared),
based on Waste Industries Inc. calculations.

• 289,000 board feet of T.CLEAR LIGHTGUARD salvaged and preserved for
future reuse; so far, four other Duke buildings have been re-roofed
with the salvaged insulation.

The helipad project reflects Duke’s commitment to vision and leadership in environmental stewardship
and sustainability, and to go beyond compliance in pursuing sustainability, stewardship and resource
conservation.

Felix Markham of Medical Center Facilities Planning was the staff architect.
Katherine Jordan was the LEED accredited professional with the Office of the Medical Center Architect.
Tim Pennigar was Engineering & Operations project manager for the helipad roof.


TCLEAR is a Better Value
A protected membrane roof is cost-effective because it performs year
after year, contributing to the building’s overall sustainability by
delaying tear-off.

Longer life cycle more than makes up for initial construction cost
– Deferring a roof replacement by 10 years can save hundreds of
thousands of dollars
Reduces annual maintenance costs because membrane is protected
from physical and environmental abuse
Insulation and ballast can be reused


Maintenance Costs
In commercial roofing, maintenance costs can be significant if patching,
cleaning or rejuvenating is required.
TCLEAR systems have significantly lower maintenance costs than
conventional low slope roofs.
For example, the owner of a 50,000 ft2 (4,645 m2) PMR can reduce the
maintenance costs from 3 percent of initial roof cost to 1 percent of
initial roof cost, providing a significant cost savings.
An investment in a LIGHTGUARD PMR is paid back in about 7 to 10
years, after which the savings in maintenance costs continue to help
the operations budget.


M I C H I G A N S T A T E U N I V E R S I T Y
The LIGHTGUARD© System at Work
Michigan State University in East Lansing, Mich., is no stranger to the
protected membrane roof. More than 160 campus buildings have a
PMR

In addition to day-to-day durability
and thermal performance,
T.Clear LIGHTGUARD© withstands
the load demands on the PMR during
renovation and expansion projects.


T H E C O N F E R E N C E C E N T E R
The LIGHTGUARD© System at Work
Located in downtown Salt Lake City, The Conference Center has a
70,000 ft2 (6,500 m2) rooftop meadow – a massive re-creation of the
wild landscape of Utah. The vegetation provides an aesthetically
pleasing location as well as contributes to the reduction of the “urban
heat island” effect.

STYROFOAM extruded polystyrene
from Dow provides the water resistance
and compressive strength necessary
to support the roof’s heavy soil loads.
Coupled with T.Clear LIGHTGUARD© ,
walk areas are protected from incidental
traffic and use.


T H E A M E R I C A N C I T Y B U I L D I N G,
Chicago

HEAVYGUARD©


Sustainability in
the Roofing Industry
As concern grows over energy use and natural
resources, building owners and occupants are asking for
“green” or environmentally friendly buildings that offer
long-term performance and efficiency without straining
construction and operating budgets.


Sustainability in
the Roofing Industry
To contribute to sustainability, builders and architects are
choosing LIGHTGUARD© & CTI Insulated Roofing
Panels for PMR applications. Its long-term thermal
performance curbs the drain on energy resources, and
its durability and superior moisture resistance increases
the building’s life cycle.


Sustainability Objective
Objective: Reduce the total energy consumption of the building
(life-cycle costing)

PMR benefit: PMR performs year after year – and the more a roof
can be kept in use, the more it contributes to the overall
sustainability of the building by delaying the impact of eventual
tear-off.


Objective: Reduce global warming impact from excessively using
energy sources (reduce)

PMR benefit: A PMR using a rigid, extruded polystyrene
insulation, with one of the highest R-values per inch, will realize
reductions in utility bills, year after year. By reducing HVAC loads,
this will lower pollution emissions
from burning fossil fuels.

Objective: Reduce global warming impact by providing a
sustainable and durable SOLAR Panel application

Introducing
LIGHTGUARD Solar

Sustainability - Solar

LIGHTGUARD Solar
• Directly Applied to LIGHTGUARD and CTI
No Pitch Pockets
No Wind Uplift Concerns
• No Premature Aging of Roof Membrane
• Retro-Fit Existing LIGHTGUARD and CTI PMR Roofs
• Non-Glass System-– Passes Hail Testing

• Plug and Play System – Could Be Easily Redeployable


Q U E S T I O N S A B O U T P M R ?
Has the Answers
Q: Is a LIGHTGUARD PMR too expensive?
©

A: Actually, a LIGHTGUARD PMR saves money in the long run.
©

The building can be weatherproofed faster, allowing interior trades to start
work quicker.
The insulation is laid after the membrane – and can be laid in any weather.
Greater quality control is possible, as the membrane can be inspected or
flood-tested before insulating and ballasting.
The overall labor costs and material costs are reduced compared to
systems that require fiberboard and separate vapor retarder.
Lower maintenance cost and longer roof life span offset the initial capital
cost for a LIGHTGUARD PMR.©


Has the Answers
Q: Will my LIGHTGUARD PMR roof blow off?
©

A: No, because pressure equalization offsets the effect of wind uplift. The
integrity of the membrane is essential to prevent air infiltration under the
membrane.

In a lightweight PMR – with a loose applied membrane and covered with
LIGHTGUARD or CTI Roof Insulation – external pressures due to wind are
©

mostly applied to the membrane.

The membrane will withstand the National Building Code of Canada calculated
pressure if it is properly attached to the deck. In the case of a loose-applied
membrane, it is important to prevent any air infiltration underneath the
membrane. When air infiltration is restricted, any movement of the membrane
will create a vacuum that will neutralize the uplift forces and keep the
membrane on the deck.

Margate Condos

Coastal
Application
with High
Wind
Securement

Margate Condos – Atlantic Coast –A View from the PMRoof


Has the Answers
Q: Will my insulation get wet?
A: The Styrofoam extruded polystyrene insulation used in LIGHTGUARD and ©

CTI Roof Panels has the lowest moisture absorption of any insulation in the
marketplace today.

All insulation can become saturated if a “diffusion closed” situation occurs. This
happens when the insulation is sandwiched between the vapor barrier and the
roof deck. Constant ponding can also lead to this condition. To avoid diffusion
closed situations, provide for a good slope to drain in your roof design (a
minimum of 1/4" slope per foot) and ensure impermeable roof coverings, such
as pavers, are installed on pedestals, so that vapor can escape.


Has the Answers
Q: Is it difficult to find a leak in a PMR
system?
A: In loose-laid membrane systems, it is true that water
can enter the building far from the actual location of the
leak. However, if the membrane is fully bonded to the
deck, this water remains at the location of the leak. And in
the case of a leak, the PMR is far easier to repair, because
all of the original materials can be reused – an
environmentally friendly feature that will save you
thousands of dollars.


The Smart Choice
A PMR assembly using LIGHTGUARD or CTI Insulated Roof
©

Panels is the preferred choice, whether you are an architect, builder
or building owner.

To sum up the primary benefits, T.CLEAR CORP PMR SYSTEM :

Maintains membrane at a relatively constant
temperature
Protects membrane from weathering and
physical abuse
Allows year-round construction


The Smart Choice (continued)
Permits easy removal and re-installation of
ballast and insulation
Compatible with many membrane types
Provides excellent moisture resistance
Stable long-term thermal performance
Exceptional durability extends roof or plaza life
Reduces repair expenditures


Count on
For a leading PMR performer
that pays for itself with an
extended life cycle and
reduced maintenance and
repair costs, count on
LIGHTGUARD & CTI
©

Insulated Roof Panels.

Durham Detention

Durham Detention Center

Anchorage International Airport

www.tclear.com

Thank you & for more information:
800.544.7398
513-870-9246
Rwindell@tclear.net

Protected Membrane Roof System - LightGUARD

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