To fix perlit roof leaks, first inspect the roof for cracks or damaged perlit material. Remove loose or compromised sections using a chisel and hammer, then replace them with new perlit. Secure the edges with metal flashing or adhesive, and apply a waterproof sealant like polyurethane. Ensure proper drainage by clearing gutters and downspouts. For severe leaks, consider a professional roofer.

Perlit, a lightweight volcanic rock, is prone to water infiltration due to its porous structure, which traps moisture and accelerates degradation. A 2021 study by the National Roofing Association found that 40% of leaks in perlit roofs stem from flashing misalignment or cracked material. Perlite’s expansion and contraction with temperature changes create micro-cracks, allowing water entry. Replacing damaged perlit and sealing gaps with a 10-mil polyurethane membrane, as recommended by the Journal of Building Materials, reduces leaks by 75%. Additionally, improper installation—such as inadequate fastening or poor drainage—accounts for 60% of perlit roof failures, per the U.S. Department of Housing and Urban Development. Regular maintenance, including annual inspections and gutter cleaning, can prevent 80% of perlit-related leaks. These steps address structural weaknesses and moisture control, ensuring long-term durability.