Granule Loss and Deck Saturation
Three-tab and early architectural shingle systems installed in the 1990s are reaching the end of their service life across the Manzanita Avenue corridor neighborhoods. Granule displacement exposes the asphalt mat directly to UV degradation, and once winter rainfall penetrates the surface, original plank decking or early OSB absorbs moisture and begins to fail, triggering ceiling damage that requires both deck replacement and full roof replacement.



