Here are some common signs that a 1260°C ceramic fiber insulation board may be damaged:
Cracks or breaks in the surface material. Fibers have low tensile strength.
Missing or detached sections, resulting in gaps or holes in the board.
Crushed or compressed areas from too much mechanical pressure.
Singed, burned or discolored patches from overexposure to heat/flames.
Presence of loose, flaking or pulverized fibers, indicating degraded binder.
Dents, punctures or protrusions distorting the normally flat surface.
Loose or failing attachments, clips or anchors meant to secure it.
Friability – fibers shed from the surface easily with gentle pressure.
Dirt or debris accumulated in or through the material.
Warping, bowing or deformation from extreme temperature variations.
Crumbling or breaking into smaller pieces upon contact.
Prompt repair or replacement of damaged boards is important to maintain insulation performance and reduce safety risks from degraded ceramic fibers. Regular inspections can catch issues early.