Fenestration Installer Certification Exam

Fenestration Installer Certification Exam Practice Questions And Correct Answers (Verified Answers) Plus Rationales 2026 Q&A | Instant Download Pdf

• Which of the following is the primary purpose of flashing around

windows?

• To provide aesthetic appeal
• To prevent water infiltration
• To improve thermal insulation
• To reduce sound transmission

Rationale: Flashing is designed to direct water away from the

window assembly, preventing leaks and potential structural damage.

• What is the standard height above the finished floor for the

installation of a window sill in residential construction?

• 24 inches
• 30 inches 1 / 4

• 36 inches
• 42 inches

Rationale: Most residential building codes recommend a sill height of

approximately 36 inches for safety and accessibility.

• Which type of window is best suited for areas with limited outward

space for operation?

• Casement
• Sliding
• Awning
• Hopper

Rationale: Sliding windows move horizontally, requiring no outward

swing, making them ideal for tight exterior spaces.

• What is the primary benefit of a low-E glass coating?
• Enhances clarity
• Reduces heat transfer
• Increases impact resistance
• Improves soundproofing

Rationale: Low-emissivity (low-E) coatings reflect infrared energy,

helping to control heat gain and loss.

• In window installation, what is the purpose of a nailing fin?
• To act as insulation
• To secure the window to the framing
• To provide drainage 2 / 4

• To reduce condensation

Rationale: The nailing fin allows the window to be fastened to the

rough opening while providing a surface for flashing integration.

• Which tool is essential for checking the level and plumb of a window

during installation?

• Tape measure
• Hammer
• Spirit level
• Caulking gun

Rationale: A spirit level ensures the window is installed straight and

plumb, critical for operation and weatherproofing.

• What is the typical spacing for fasteners when installing vinyl windows

according to most manufacturer specifications?

• 12 inches on center
• 16 inches on center
• 24 inches on center
• 36 inches on center

Rationale: Manufacturers commonly specify fasteners at 24-inch

intervals along the nailing fin for secure installation.

• Which of the following is a common cause of window fogging between

double-glass panes?

• Poor caulking
• Improper flashing 3 / 4

• Seal failure
• Incorrect frame sizing

Rationale: Fogging occurs when the seal between panes fails,

allowing moisture to enter the airspace.

• Which safety equipment is required when working on windows at

heights above 6 feet?

• Safety glasses only
• Gloves only
• Fall protection
• Hard hat only

Rationale: OSHA requires fall protection when working above 6 feet

to prevent serious injury.

• Which type of window opening provides the best ventilation

while minimizing rain entry?

• Single-hung
• Awning
• Sliding
• Fixed

Rationale: Awning windows hinge at the top and open outward,

allowing airflow while keeping rain out.

11. The primary purpose of a sill pan is to:

• Improve aesthetics
• Redirect water away from the rough opening
• / 4