3.1602.2 Duct Spray Polyurethane Foam (SPF) Installation

Topic: 
Ducts
Subtopic: 
Duct Sealing
Desired Outcome: 
Exposed ductwork in unconditioned spaces insulated and sealed
TitleSpecification(s)Objective(s)
3.1602.2a
Installation

Insulation will be installed according to manufacturer specifications and all provisions of the IRC IRC International Residential Code

SPF SPF Spray polyurethane foam will be applied to desired thickness, using pass thickness maximum as indicated by manufacturer

Sufficient insulation will be applied to all joints and around all penetrations to the conditioned space through walls, floors, and ceilings

SPF SPF Spray polyurethane foam will be covered with proper fire protective coverings or coatings appropriate for location of ductwork and type of foam used and provisions of the IRC IRC International Residential Code and local codes

If ducts are used for air-conditioning, an appropriate vapor retarder Vapor retarder A material that slows the passage of water vapor and contains a perm rating above 1 will be applied on the SPF SPF Spray polyurethane foam if open-cell SPF SPF Spray polyurethane foam used

If 2" or more of closed-cell SPF SPF Spray polyurethane foam is used, follow manufacturer specification to determine if additional vapor retarder Vapor retarder A material that slows the passage of water vapor and contains a perm rating above 1 is needed

The flame spread index will not be greater than 25 and the smoke- developed index is not greater than 450 at the specified installed thickness

The foam plastic will be protected with an ignition barrier Ignition barrier Any layer of material that protects another from catching fire due to heat or spark

Insulate and seal all exposed ductwork in unconditioned spaces

Manage moisture condensation on ductwork that carry cooled air in warm, moist climates

Provide adequate fire protection for exposed SPF SPF Spray polyurethane foam

TitleSpecification(s)Objective(s)
3.1602.2a
Installation

Insulation will be installed according to manufacturer specifications and all provisions of the IRC IRC International Residential Code

SPF SPF Spray polyurethane foam will be applied to desired thickness, using pass thickness maximum as indicated by manufacturer

Sufficient insulation will be applied to all joints and around all penetrations to the conditioned space through walls, floors, and ceilings

SPF SPF Spray polyurethane foam will be covered with proper fire protective coverings or coatings appropriate for location of ductwork and type of foam used, and provisions of the IRC IRC International Residential Code and local codes

If ducts are used for air-conditioning, an appropriate vapor retarder Vapor retarder A material that slows the passage of water vapor and contains a perm rating above 1 will be applied on the SPF SPF Spray polyurethane foam if open-cell SPF SPF Spray polyurethane foam used

If 2" or more of closed-cell SPF SPF Spray polyurethane foam is used, follow manufacturer specification to determine if additional vapor retarder Vapor retarder A material that slows the passage of water vapor and contains a perm rating above 1 is needed

The flame spread index will not be greater than 25 and the smoke- developed index will not be greater than 450 at the specified installed thickness

The foam plastic will be protected with an ignition barrier Ignition barrier Any layer of material that protects another from catching fire due to heat or spark

Insulate and seal all exposed ductwork in unconditioned spaces

Manage moisture condensation on ductwork that carries cooled air in warm, moist climates

Provide adequate fire protection for exposed SPF SPF Spray polyurethane foam