Question
What are fire batts?
Expert Answer
Fire batts are high-density mineral wool boards coated with an ablative fire-resistant paint. They are used to seal large openings in walls or floors (e.g., around cable trays) where mastic alone would fall out. They provide a physical barrier to fire and smoke while also offering acoustic insulation. We cut them to fit the void precisely and seal the edges with intumescent mastic.
