LOUISIANA SPECIALTY 7 GLASS, GLAZING &
STOREFRONTS CONTRACTOR EXAM PREP
2026–2027 | COMPLETE LSLBC STUDY GUIDE
WITH PRACTICE QUESTIONS, CODE REVIEW
& DETAILED RATIONALES
• This study guide contains 200 practice questions covering all topics tested on the
Louisiana LSLBC Specialty 7 Glass, Glazing & Storefronts Contractor Exam, designed
to simulate real exam conditions with detailed EXPERT RATIONALE to reinforce
understanding.
• Use this material by reading each question carefully, selecting your answer before
checking the correct option, and studying the EXPERT RATIONALE to build code
knowledge and practical application skills for the 2026–2027 exam cycle.
LOUISIANA SPECIALTY 7 — GLASS, GLAZING & STOREFRONTS CONTRACTOR
EXAM PREP 2026–2027
Question 1: What is the minimum thickness of tempered glass required for a
frameless glass door used in a commercial storefront application?
A. 1/4 inch
B. 5/16 inch
C. 3/8 inch
D. 1/2 inch
E. 3/4 inch
C. 3/8 inch Frameless glass doors in commercial storefronts must be a
minimum of 3/8 inch tempered glass to provide adequate strength and safety per
ASTM and glazing industry standards.
Question 2: Which type of glass is required by code in hazardous locations
such as shower enclosures and tub surrounds?
,A. Annealed glass
B. Float glass
C. Laminated glass
D. Safety glazing material
E. Wired glass
D. Safety glazing material Building codes require safety glazing material in
hazardous locations including shower enclosures, tub surrounds, and similar wet
areas to reduce the risk of injury from breakage.
Question 3: What does the abbreviation "IGU" stand for in the glazing
industry?
A. Interior Glass Unit
B. Insulating Glass Unit
C. Integrated Glazing Utility
D. Industrial Glass Upgrade
E. Insulated Glazing Underlay
B. Insulating Glass Unit IGU stands for Insulating Glass Unit, which refers to a
sealed assembly of two or more glass panes separated by a spacer and filled with
air or gas to improve thermal performance.
Question 4: Which ASTM standard governs the performance of safety glazing
materials used in buildings?
A. ASTM C864
B. ASTM C920
C. ASTM C1048
D. ASTM C1172
,E. ASTM E2190
C. ASTM C1048 ASTM C1048 is the standard specification for heat-treated flat
glass, including tempered and heat-strengthened glass used as safety glazing in
building applications.
Question 5: What is the primary purpose of a setting block in a glazing
installation?
A. To seal the perimeter of the glass
B. To support the weight of the glass at the bottom of the frame
C. To prevent condensation on the glass surface
D. To secure the top of the glass to the frame
E. To provide a thermal break between glass and frame
B. To support the weight of the glass at the bottom of the frame Setting
blocks are placed at the bottom of the glazing rabbet to bear and distribute the
dead load weight of the glass, preventing it from resting directly on the frame sill.
Question 6: Which gas is most commonly used to fill the cavity of an
insulating glass unit to improve thermal performance?
A. Oxygen
B. Nitrogen
C. Argon
D. Helium
E. Carbon dioxide
C. Argon Argon gas is the most commonly used fill gas in IGUs because it has
lower thermal conductivity than air, improving the unit's insulating value at a
relatively low cost.
, Question 7: What is "heat-strengthened glass"?
A. Glass that has been fully tempered to safety glazing standards
B. Glass that has been coated with a solar reflective film
C. Glass that has been partially heat-treated to approximately twice the strength of
annealed glass
D. Glass that has been laminated with a heat-resistant interlayer
E. Glass that has been fired in a kiln to increase clarity
C. Glass that has been partially heat-treated to approximately twice the
strength of annealed glass Heat-strengthened glass undergoes a controlled
heating and cooling process that makes it roughly twice as strong as annealed glass
but does not meet the full safety glazing standard of tempered glass.
Question 8: Under the International Building Code, which locations require
safety glazing within how many inches of a door?
A. Within 12 inches of the door edge and below 60 inches in height
B. Within 24 inches of the door edge and below 60 inches in height
C. Within 18 inches of the door edge and below 72 inches in height
D. Within 24 inches of the door edge and below 72 inches in height
E. Within 36 inches of the door edge and below 84 inches in height
B. Within 24 inches of the door edge and below 60 inches in height IBC
requires safety glazing in sidelights and panels within 24 inches of a door's edge
and below 60 inches from the floor due to the high risk of accidental contact in
those zones.
Question 9: What is the function of a "weep hole" in a storefront glazing
system?
STOREFRONTS CONTRACTOR EXAM PREP
2026–2027 | COMPLETE LSLBC STUDY GUIDE
WITH PRACTICE QUESTIONS, CODE REVIEW
& DETAILED RATIONALES
• This study guide contains 200 practice questions covering all topics tested on the
Louisiana LSLBC Specialty 7 Glass, Glazing & Storefronts Contractor Exam, designed
to simulate real exam conditions with detailed EXPERT RATIONALE to reinforce
understanding.
• Use this material by reading each question carefully, selecting your answer before
checking the correct option, and studying the EXPERT RATIONALE to build code
knowledge and practical application skills for the 2026–2027 exam cycle.
LOUISIANA SPECIALTY 7 — GLASS, GLAZING & STOREFRONTS CONTRACTOR
EXAM PREP 2026–2027
Question 1: What is the minimum thickness of tempered glass required for a
frameless glass door used in a commercial storefront application?
A. 1/4 inch
B. 5/16 inch
C. 3/8 inch
D. 1/2 inch
E. 3/4 inch
C. 3/8 inch Frameless glass doors in commercial storefronts must be a
minimum of 3/8 inch tempered glass to provide adequate strength and safety per
ASTM and glazing industry standards.
Question 2: Which type of glass is required by code in hazardous locations
such as shower enclosures and tub surrounds?
,A. Annealed glass
B. Float glass
C. Laminated glass
D. Safety glazing material
E. Wired glass
D. Safety glazing material Building codes require safety glazing material in
hazardous locations including shower enclosures, tub surrounds, and similar wet
areas to reduce the risk of injury from breakage.
Question 3: What does the abbreviation "IGU" stand for in the glazing
industry?
A. Interior Glass Unit
B. Insulating Glass Unit
C. Integrated Glazing Utility
D. Industrial Glass Upgrade
E. Insulated Glazing Underlay
B. Insulating Glass Unit IGU stands for Insulating Glass Unit, which refers to a
sealed assembly of two or more glass panes separated by a spacer and filled with
air or gas to improve thermal performance.
Question 4: Which ASTM standard governs the performance of safety glazing
materials used in buildings?
A. ASTM C864
B. ASTM C920
C. ASTM C1048
D. ASTM C1172
,E. ASTM E2190
C. ASTM C1048 ASTM C1048 is the standard specification for heat-treated flat
glass, including tempered and heat-strengthened glass used as safety glazing in
building applications.
Question 5: What is the primary purpose of a setting block in a glazing
installation?
A. To seal the perimeter of the glass
B. To support the weight of the glass at the bottom of the frame
C. To prevent condensation on the glass surface
D. To secure the top of the glass to the frame
E. To provide a thermal break between glass and frame
B. To support the weight of the glass at the bottom of the frame Setting
blocks are placed at the bottom of the glazing rabbet to bear and distribute the
dead load weight of the glass, preventing it from resting directly on the frame sill.
Question 6: Which gas is most commonly used to fill the cavity of an
insulating glass unit to improve thermal performance?
A. Oxygen
B. Nitrogen
C. Argon
D. Helium
E. Carbon dioxide
C. Argon Argon gas is the most commonly used fill gas in IGUs because it has
lower thermal conductivity than air, improving the unit's insulating value at a
relatively low cost.
, Question 7: What is "heat-strengthened glass"?
A. Glass that has been fully tempered to safety glazing standards
B. Glass that has been coated with a solar reflective film
C. Glass that has been partially heat-treated to approximately twice the strength of
annealed glass
D. Glass that has been laminated with a heat-resistant interlayer
E. Glass that has been fired in a kiln to increase clarity
C. Glass that has been partially heat-treated to approximately twice the
strength of annealed glass Heat-strengthened glass undergoes a controlled
heating and cooling process that makes it roughly twice as strong as annealed glass
but does not meet the full safety glazing standard of tempered glass.
Question 8: Under the International Building Code, which locations require
safety glazing within how many inches of a door?
A. Within 12 inches of the door edge and below 60 inches in height
B. Within 24 inches of the door edge and below 60 inches in height
C. Within 18 inches of the door edge and below 72 inches in height
D. Within 24 inches of the door edge and below 72 inches in height
E. Within 36 inches of the door edge and below 84 inches in height
B. Within 24 inches of the door edge and below 60 inches in height IBC
requires safety glazing in sidelights and panels within 24 inches of a door's edge
and below 60 inches from the floor due to the high risk of accidental contact in
those zones.
Question 9: What is the function of a "weep hole" in a storefront glazing
system?
