Why is cleaning the substrate important before applying firestop materials?
A clean surface ensures proper adhesion and performance of firestop materials, which is essential for maintaining the fire-resistance rating.
Which tool is commonly used to install firestop sealant?
A caulking gun allows even application of firestop sealant into gaps or around penetrants.
What must be verified before installing a firestop system?
Installers must verify that the chosen UL-listed system matches the field conditions, including the penetrant type, size, and construction type.
What is the purpose of using a backing material like mineral wool?
Backing materials support the sealant, help achieve correct depth, and improve the fire-resistance of the system.
Why must firestop systems be installed exactly as tested?
Altering a tested firestop system may compromise its ability to prevent the spread of fire and invalidate code compliance.
Which of the following is essential for quality control during firestop installation?
Documenting the installation and taking photos ensures proper installation, supports inspections, and verifies compliance with UL system specs.