🧱 UL 2079 / ASTM E1966 Dynamic Movement (±25% to ±50%), Head-of-Wall Spray

Fire-Rated Dynamic Joint Sealant Calculator

Size commercial dynamic building expansion and head-of-wall (HOW) fire joints under UL 2079: calculate joint joint width (1" to 4" with ±25% Class II / ±50% Class III dynamic seismic movement), firestop elastomeric silicone/acrylic spray coverage (gallons), mineral wool backing density, and contractor profits.

1. Project & Operating Inputs

Total Head-of-Wall & Expansion Joints (Linear Feet e.g. 4,500 ft)

Nominal Joint Width (Inches e.g. 2.0" Deflection Joint)

Customer Bid Price ($ / Linear Foot e.g. $14.50/ft)

Mineral Wool Strips, Elastomeric Firestop Spray & Labor ($ / Ft)

2. Financial Breakdown & Yield

UL 2079 DYNAMIC FIRE JOINTS

Turnkey Joint Spray Profit

Fireproofing Contractor Margin

0.0%

Gross Revenue / Bill

Total Project CapEx

Operating / Material Cost