Introduction to Window Film

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Project Specifiers Guidelines And Information
Presented by

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Introduction to Window Film
LLumar and Vista Window Film were designed to
improve the performance of glass.
More than 100 LLumar and Vista films are
available for professional retrofit installation
on glass surfaces. These films perform the
following functions

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• Increase safety
• Reduce solar heat gain
• Cut glare
• Reduce fading of interiors
• Improve security
• Provide privacy

• Insulate
• Improve building aesthetics
• Create decorative glass
• Protect surfaces from graffiti

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The information in this presentation should help
you select the proper film for your
applications.Please take the time to read over
the technical definitions so you can evaluate
the performance of each film. Using the
specifiers guide will help on bid packages and
job specifications.Sales and technical
assistance are available.Call your distributor
or CPFilms at 1-800-255-8627 or1-540-627-3000.

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LLumar Product Specifications

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Vista Product Specifications

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Technical Definitions

• Total Solar Transmittance

The ratio of the amount of total solar energy in
the full solar wavelength range (300-2,100
nanometers) that is allowed to pass through a
glazing system to the amount of total solar
energy falling on the glazing system. Value is
expressed as a percent.

• Total Solar Reflectance

The ratio of total solar energy which is
reflected outward by a glazing system to the
amount of total solar energy falling on the
glazing system. On filmed windows, this
reflectance is a function of the side of the film
facing the window surface. Value is expressed as
a percent.

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• Total Solar Absorptance

The ratio of the amount of total solar energy
absorbed by a glazing system to the amount of
total solar energy falling on the glazing system.
Solar absorptance is that portion of total solar
energy neither transmitted nor reflected.

• Visible Light Transmittance

The ratio of the amount of total visible solar
energy (380-780 nanometers) that is allowed to
pass through a glazing system to the amount of
total visible solar energy falling on the
glazing system. Value is expressed as a percent.
Glare is influenced by visible light
transmittance through a glazing system.

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• Visible Light Reflectance

The ratio of the amount of total visible solar
energy (380-780 nanometers) that is reflected by
a glazing system. Value is expressed as a
percent. Glare is influenced by visible light
transmittance through a glazing system.

• Winter Median U-Value

The overall heat transfer coefficient of the
glazing system. U-Value is a measure of the heat
transfer that occurs through the glazing system
and its outer and inner surfaces. This value is a
function of temperature, and is expressed in BTU
per square foot per hour per degree-Fahrenheit
(BTU/sq.. ft./hr/ F). The lower the U-Value, the
better the insulation qualities of the glazing
system. This value is measured at 45 F
outdoors, 68 F indoors, 15 mph wind.

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• Luminance Efficacy

The ratio of visible light transmittance (in
decimal form) to shading coefficient. Values
approaching or exceeding 1.0 reject a large
percentage of heat from the infra-red portion of
the solar spectrum rather than rejection of heat
from the visible portion.

• Ultraviolet (UV) Rejected

The ratio of the amount of total UV solar energy
(300-380 nanometers) that is not allowed to pass
through a glazing system to the amount of total
UV solar energy falling on the glazing system.
Ultraviolet is one portion of the total solar
energy spectrum which greatly contributes to
fading and deterioration of fabric and
furnishings.

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• Solar Energy Rejected

The percent of incident solar energy rejected by
a glazing system. The higher this value, the less
solar heat energy that is transmitted by the
glazing system.

• Emissivity

The ability of a surface to absorb room heat and
to reflect it. The lower the emissivity, the less
room heat is absorbed - thus more heat is
reflected back into the room.

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How To Choose A Window Film To Meet Your Needs
1. Ask yourself what you are trying to accomplish
Reduce excessive heat gain? Reduce incoming
light/glare? Reduce ultraviolet/reduce
fading? Create privacy?

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Create a decorative appearance? Change the
aesthetics of the glass? Improve glass
safety/security by reducing flying fragments of
broken glass? Reduce glass damage from graffiti
artists?

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2. Read over the definitions on the technical
definitions page. 3. Use the specification guide
to help you choose a film for installation. When
creating a bid/proposal, additional criteria on
the individual installation should considered,
such as available hours for installation, latter
or scaffolding requirements, work rules, and
logistics (parking, elevators).

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4. Examples
For Increased Safety...
Select a film that passes the impact test for
safety glazings, either ANSI Z97.1 or 16 CFR 1201
Category ll. Typically 4 mil films are sufficient
to upgrade annealed glass to safety glazing.
For Heat Gain Reduction...
The most important factor is solar energy
rejected. The higher the number, the better the
performance.

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For Glare Control...
The visible light transmission is the most
significant factor in reducing glare. The lower
the number, the less light/glare entering.
For Fade Reduction...
Fading is the result of three primary factors
Ultraviolet 40, Heat 25, Visible light -
25, Miscellaneous 10 the best performing
films provide 99 or more ultraviolet rejection,
a high solar energy rejection, and low light
transmission.

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For Improved Security...
Use of thicker films 7, 11, or 15 mil films are
needed for improved security. The thicker the
film, the more force that will be required to
break through the film/glass.
For Privacy...
The visible light reflected and the visible light
transmission determines how much privacy is
obtained. A high visible light reflection and a
low visible light transmission offer the best
combination.
For Insulation...
The emissivity is the most important criteria.
The lower the emissivity, the better the film
performance.

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To Improve Building Aesthetics...
Since this is a very individual issue based on
the buildings character and the
owner/architect/designers preference, there are
several factors to consider Do you want a color
or a neutral appearance? Colors available are
silver, gold, blue, green and dark grey (custom
colors available for very large projects)
neutrals are available in a number of different
light transmission. Do you want the film to have
other performance characteristics? Look at Solar
Energy Rejected, Ultraviolet Rejection, and Solar
Reflectance.

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For A Decorative Appearance...
Patterned films are available to give the
appearance of etched glass. Black, white, frost,
frosted silver and bronze films are also
available.
For Graffiti Protection...
Thick, clear films are available for surface
protection of glass, mirrors and decorative
finishes. Film is removed and replaced after
being defaced.

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Specification Guide For Field Applied Reflective
Glass Coatings
1.0 Product 1.1 Product to be
installed shall be LLumar R20 SR CDF as
to be manufacturer by CPFilms Inc., Martinsville,
Virginia, or approved equal.

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2.0 Product Performance
2.1 When installed to the interior side of a
single pane 1/8 glass window unit,
the following solar properties must be met Solar
Energy Rejected 79 Shading Coefficient .24 Sol
ar Reflectance 55 Solar Absorptance 33 Solar
Transmittance 12 Visible Light
Transmittance 15 Visible Light
Reflectance 60 U-Value (winter
median) .99 Ultraviolet Reduction 99 Glare
Reduction 83 Emissivity .71 Luminous
Efficacy .63

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3.0 Product Installation
3.1 Film shall be installed per the
manufacturers instruction by an
authorized dealer. Film shall be installed with
X-100 mounting solution (unless otherwise
specified by the manufacturer) and custom
cut to the glass with neat, square corners and
edges to within 1/16 of the window frame.

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4.0 Materials
4.1 Film Construction Film shall be a
multi-layered product consisting of
metallized layer (or layers) of polyester film
laminated to and protected by an
ultraviolet stabilized layer of polyester film.
The ultraviolet stabilized film shall be
impregnated throughout with UV absorbers. UV
protection by placing UV absorbers only in
film adhesive layers is not acceptable.
4.2 Adhesive Film shall have a one-time water
activated, dry adhesive system which
forms a molecular bond between the film and glass
rather than being adhered to the glass
by a semi-dry adhesive layer.
4.21 The adhesive shall be protected prior to
installation by a release liner that
will be removed and discarded at installation.

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4.3 Scratch Resistant Coating Film shall have
a scratch resistant coating with a Delta
Haze Test level of less than 5.0 when tested
under the ASTM D-1044 test method with
the Taber abrasion test using CS-10F
wheel, 100 cycles, 500g.
5.0 Warranty
5.0 Film shall have a manufacturer-backed
warranty against cracking, crazing,
peeling, blistering, bubbling, demetallizing, and
delaminating. This warranty shall cover
full replacement of material and labor. The
manufacturer is defined by active involvement
in manufacturing or assembling the
components of the product.

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6.0 Quality Assurance
6.1 Architect shall require a sample
installation to satisfy aesthetic
concerns, installation capabilities, and optical
quality or any film or installing
contractor under consideration.
6.2 The manufacturer of the film shall certify
that materials supplied comply with the
specifications listed above.
6.3 The basic methodology and definitions used
to evaluate solar control window films
shall be consistent with those set forth in the
ASHRAE Handbook of Fundamentals.
6.4 Completed installation should be viewed
from a distance of ten (10) feet against
a bright uniform sky or background. The film
shall appear uniform in appearance with
no visible streaks, banding, thin spot or
pinholes.
6.5 After installation, a silicone polish will
be applied for added protection, Improved
appearance and easier maintenance.

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Specification Guide For Field Applied Safety Film
1.0 Product 1.1 Product to be
installed shall be LLumar Magnum/Safety/Security
2.0 Product Performance
2.1 Reference Test Standards ASTM
E903 ASTM D882-91 ASTM D3330-96 ASTM D1044 2.2
UV Transmission Safety films shall be
constructed with UV absorbing materials
that limit the weighted UV Transmission to less
than 5 based on measurements from
300-380nm on 1/4 clear glass, when
measured in accordance with ASTM E903.

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2.3 Tensile Properties Films submitted shall
have independent test data demonstrating
the minimum tensile properties given in the
Minimum Safety Film Tensile Properties
table on the next page. Tensile proper-
ties are to be measured in accordance with ASTM
D882-91, Standard Test Method for
Tensile Properties of Thin Plastic Sheeting,
Method A, Constant Rate-of-Grip
Separation. Tensile properties presented are to
be the average of a minimum of five
samples. Testing setup shall be
identified on test data presented and shall be
Sample width 1 inch, Crosshead Speed 20
inches per minute, Grip Distance 2
inches. Film(s) submitted shall be
identified as to thickness and the number of
plys of construction to enable determining if
each film meets the minimum tensile
strength requirements shown.

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2.4 Peel Strength Product shall have
independent test data demonstrating the
minimum Peel Strength shown below when measured
in accordance ASTM D3330-96 Standard
Test Methods for Peel-Adhesion at 180 degree
Angle. Test conditions shall be identified on
test data presented and shall be
Crosshead Speed 12 inches per minute, Specimen
Width 1 inch, Substrate Glass. Values
presented shall be the average of a minimum of
two specimens. All 4 and 7 mil films
minimum peel strength 3,200 grams per inch
(112 oz/inch or
7 lb/inch) 8 mil films minimum peel
strength 2,850 grams per inch
(100 oz/inch or 6.2
lb./inch) 11 mil films
minimum peel strength 1,550 grams per inch
(55 oz/inch or
3.4 lb./inch) 15 mil films
minimum peel strength 1,550 grams per inch
(55 oz/inch or
3.5/lb./inch)

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2.5 Scratch Resistant Coating Independent
test data shall be submitted
demonstrating a maximum increase in haze of 5
based upon haze measurements taken before
and after abrasion when tested in
accordance with ASTM D1044, using CS 10-F
abrasion wheels, 500 gram weights, 100
cycles. Percent increase in haze reported shall
be the average increase in haze from a
minimum of three samples.
2.0 Product Installation
3.1 Film shall be installed following the
manufacturers instructions by an
authorized dealer. Film shall be installed with
the manufacturers recommended mounting
solution and custom cut to the glass with neat,
square corners and edges to within 1/8 of
the window frame.

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4.0 Materials
4.1 Film adhesive shall be protected prior to
installation by a silicone-coated release
liner which is removed and discarded during
installation. 4.2 Film shall have a UV-cured
acrylate-based Scratch Resistant (SR)
coating to protect the film after installation,
sufficient to protect the film as
outlined in Section 2.5.
5.0 Warranty
5.1 Film shall have a manufacturer-backed
warranty to cover full replacement of
material and labor. The manufacturer is defined
by active involvement in manufacturing or
assembling of the components of the
product. The warranty shall cover cracking,
demetallizing and delaminating for a
period of ten years from the date of
installations.

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6.0 Quality Assurance
6.1 Architect shall require a sample
installation to satisfy aesthetic concerns,
Installation capabilities, and optical quality
of film for installing contractor under
consideration. 6.2 Completed installation
should be viewed from a distance of ten (10)
feet against a bright uniform sky or
background. The film shall appear uniform
with no visible streaks, banding, thin spots or
pin holes.

• 2000 CPFilms Inc.