As shingles age, what change occurs regarding their absorbency?

As shingles age, they undergo a process that affects their physical properties, particularly their absorbency. Older shingles tend to become increasingly absorbent due to the degradation of their materials over time, which is often exacerbated by exposure to environmental elements such as UV radiation, moisture, and temperature variations.

This change in absorbency is significant because as shingles age and their surface becomes more porous, they can retain more water. This can lead to issues like mold growth, increased weight, and potential leaks, as the shingles can become saturated and less effective at shedding water. Regular maintenance and inspection are crucial to address these changes and to ensure the roofing system remains effective in protecting the structure beneath.