Bristolite Advantage
Our mission at Bristolite is to provide our customers with the highest quality products and supreme service at an exceptional value. We also aim to provide the industry with an abundance of accurate and useful information relative to daylighting and energy conservation. We take our corporate responsibility to our employees, associates, industry colleagues and customers very seriously and we see ourselves as stewards for the efficient use of sustainable carbon free energy.


Glazing Selector

Plastic Unit Skylight Glazings

   Bristol
Acrylic
Trituff Copolyester Tufflite Polycarbonate Energy Star Fiberlite Quasar Prismatic Nano Insulgel/Lumira Super Insulating
Silica Aerogel
Coollite
Solar Heat
Blocker
Acrylic
Quasar
Low-E
 
Key
Attribute
Lowest
Cost
Greater
Strength
& Impact
Resistance
than
Acrylic with
similar cost
Best
Impact
Resistance,
Hurricane
& Burglar
Proof
Best
Strength
& Leakproof
Best Light
Transmission
Best
Insulator
Lowest
Solar Heat
Gain
Most
Energy
Efficient
VLT Light
Transmission
53% 60% 60% 63% 70% 48% 54% 49%
SHGC Solar
Heat Gain
Coefficient
0.50 0.50 0.54 0.46 0.50 0.42 0.26 0.26
U Factor /
Insulating
Value
0.56 0.65 0.55 0.63 0.57 0.17 0.45 0.17
Haze /
Light
Diffusion
100% 100% 97% 100% 100% 100% 100% 100%
Typical
Glazing
Medium
White
Acrylic
over Clear
Acrylic
White
Copolyester
over Clear
Acrylic
Clear
Polycarbonate
over White
Polycarbonate
Fiberglass
over Clear
Acrylic
Clear Impact
Modified
Prismatic
over White
Impact Modified
Prismatic
Clear Acrylic over
Clear 16 mm
Polycarbonate
panel filled with
Silica Aerogel
Coollite
Impact
Modified
Acrylic
over
White
Impact
Modified
Prismatic
Coollite
over Nano
Insulgel
Standard
Dome
Shape
Bubble Radial Triarch Bubble Bubble Radial Triarch Bubble Bubble Bubble
OSHA CFR
Compliant
Yes Yes Yes Yes Yes Yes Yes Yes
Total Load
Test
400 lb 800 lb 1,600 lb 2,200 lb 400 lb 400 lb 400 lb 400 lb
Hail
Resistance
Limited Moderate Passed FM
2" Severe
Hail Test
Passed FM
2" Severe
Hail Test
Limited Limited Limited Limited
Rate of
Burning
UBC-26-7/
ASTM D635
-06
CC2 CC1 CC1 CC1 CC2 CC2 CC2 CC2
Smoke
Density
ASTM D-284
3-99
Pass Pass Pass Pass Pass Pass Pass Pass
Ignition
Temperature
(Self Ignition)
ASTM D1929
-96
Pass Pass Pass Pass Pass Pass Pass Pass
Warranty 5 Years
No-Leak
5 Years
No-Leak
5 Years
No-Leak
10 Years
No-Leak &
< 1% VLT Loss
Per Year
5 Years
No-Leak & Max
VLT Loss 3%
5 Years
No-Leak
5 Years
No-Leak
5 Years
No-Leak

All skylights above are available with either zinc plated steel or architectural grade 6063-T5 aluminum frames. Frame types include, curb mount, self flashing (curb mount with an integral curb), or curb mount with a separate structural curb. All frames are designed with condensation gutters and non-clog weep holes. Frame options include, AAMA compliant thermal breaks, 1" polyboard insulation, double wall, wood nailer, louvers, rain guards, and custom outside/inside curb, curb height and flange dimensions. All glazings are available in alternative dome shapes including; bubble, radial triarch, pyramid and double hip except Energy Star Fiberlite.
Performance information obtained by testing glazing materials, dome sets and skylights to NFRC, NAFS, ICC, AAMA, UL, FM, IES and ASTM standards by Bristolite, material suppliers and independent third party laboratories.
OSHA compliance and load test results are for specific outer dome thicknesses.

 

Plastic Sheet Glazing Information

Material Light
Transmission
% Single
Light
Transmission
% Double
Light
Transmission
% Triple
SHGC
Single
Glazed
SHGC
Double
Glazed
SHGC
Triple
Glazed
High White Acrylic (WTH) 82 75 69 0.67 0.63 0.59
Medium White Acrylic (WTM) 53 49 45 0.55 0.50 0.48
Bronze Tinted Acrylic (BT) 27 25 23 0.50 0.46 0.42
Grey Tinted Acrylic (GT) 27 25 23 0.44 0.40 0.35
Clear Colorless Acrylic (CC) 95 92 85 0.87 0.84 0.80
White Prismatic Acrylic (WPM) 84 70 56 0.55 0.50 0.48
Clear Prismatic Acrylic (CPM) 96 94 90 0.94 0.90 0.86
U Factor Winter Heat Loss
15 mph wind
1.20 0.70 0.40
U factor Summer Heat Gain
7.5 mph wind
0.80 0.50 0.30

These values are approximate for unformed flat glazing sheets only. They may vary with material thickness and final configurations.
U Factor is similar for all above materials.

 

Glass Glazings

Bristolite procures superior quality glass products form the major architectural glass manufacturers nationwide. Because of the vast assortment and combinations of high performance coatings, colors and thicknesses it is not possible to list them all here. The following indicate a sampling of the most commonly used make-ups for overhead glazing and their properties. We recommend consulting with your design professional in selecting the appropriate glass type for your application and contact Bristolite for further information.
Insulating
Glass
Type
Exterior
Appearance
Aesthetics
Effects
Light
Transmission
%
Daily
Reflectance
Out %
Daily
Reflectance
In %
Winter
Nighttime
U Factor
Summer
Daytime
U Factor
SHGC UV
Transmittance
Clear Clear Transparent 80 15 15 0.47 0.49 0.07 < 1%
Bronze Tinted Light Brown 51 9 13 0.46 0.48 0.52 < 1%
Grey Tinted Light Grey 37 8 13 0.47 0.49 0.49 < 1%
Clear
Low-E (3)
Reflective Transparent 1 13 11 0.29 0.37 0.45 < 1%
Reflective
(2) Bronze
Reflective Dark Brown 59 14 37 0.47 0.49 0.33 < 1%
Translucent
   White
Milky White 59 20 17 0.48 0.58 0.66 < 1%
  1. Clear glass is transparent flat glass that meets the requirements and tolerances of federal specification DD-G-451 d.
  2. All of the above glasses can be heat strengthened or tempered to meet federal standard Z97.1 and the Consumer Product Safety Commission Standard 16 CFR 1201 C1 and C2.
  3. The appearance and aesthetic effect of reflective glass is greatly affected by the location of the coated side. "(2)" means the coating is on the inside surface of the of the exterior lite.
  4. Based on laminated glass as the interior lite of the insulating unit cut off at 380 nanometers (nm) wavelength. Screening out ultra violet radiation can help protect materials. However, consult with your design professional on skylight placement and compatibility. There is no guarantee or warranty against fading.
  5. SOLAR HEAT GAIN COEFFICIENT (SHGC): Measures of how well a product blocks heat caused by sunlight. It is the fraction of incident solar radiation admitted through the product (both directly transmitted and absorbed and subsequently released inward).
F