ISOVER offers options with ULTIMATE mineral wool that provide fire resistance to steel ductwork although offering thermal and acoustic Rewards. ROCKWOOL Curtainrock® is really a stone wool insulation board suitable for use in ASTM E2307 analyzed and accepted perimeter fire containment programs as the insulation with the spandrel and mullion https://grease-tight-extract-duct12234.blogsumer.com/35981957/5-essential-elements-for-fire-resisting-ductwork-insulation