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Glossary
Glass industry & system terminology.
B
Butt Glazing
Glass-to-glass joint with structural silicone, no vertical mullion.
Backlog
Approved work not yet started. A leading indicator of near-term revenue.
C
Curtain Wall
Non-load-bearing exterior building envelope, typically aluminum + glass, spanning multiple floors.
I
IGU
Insulated Glass Unit — two or more panes with a sealed air/argon gap for thermal performance.
IG Spacer
The perimeter component that separates the panes of an IGU. Warm-edge spacers reduce condensation.
L
Laminated Glass
Two panes bonded with a PVB or SGP interlayer. Holds together when broken.
Low-E
Low-emissivity coating that reflects infrared while passing visible light. Improves U-value.
N
Net 30
Payment due 30 days from invoice date.
P
PM
Project Manager. Owns schedule, budget, and delivery for a job.
S
SGP
SentryGlas Plus interlayer — stronger and stiffer than PVB, used in structural laminates.
SHGC
Solar Heat Gain Coefficient. Fraction of solar radiation admitted through a window.
Storefront System
Aluminum framing system for ground-floor commercial glazing.
T
Tempered Glass
Heat-treated safety glass ~4× stronger than annealed. Breaks into small granular pieces.
U
U-value
Rate of heat transfer through a window. Lower is better for insulation.
W
WBE
Women Business Enterprise — a certification recognizing majority women-owned businesses.