Head-of-Wall Joint Calculator
Calculate mineral wool, sealant, and deflection requirements for head-of-wall firestop joints.
Inputs
Results
Mineral wool (sq ft)
6.3
Joint area (sq ft)6.25
Sealant (fl oz)374
Sausage packs (20 oz)19
Deflection ratio (%)50%
Total installed cost ($)$435.35
Packing Depth (in)4
How to Use This Calculator
- Enter Joint width (in), Wall length (ft), and Expected deflection (in).
- Set Fire rating (hrs) and Wall type (1-3).
- Review the Mineral wool (sq ft) result.
- Use Joint area (sq ft) and Sealant (fl oz) to inform your decision.
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