Is it Normal for Pink Batt Insulation to Turn Partially Gray?

It is not uncommon for pink fiberglass batt insulation to appear partially gray over time, especially in older installations or in areas with moisture or excessive dust. Here are a few reasons why pink insulation might turn gray:

Dust and Dirt Accumulation: Over time, dust, dirt, and other airborne particles can settle on the insulation, causing it to appear gray. This is particularly common in attics or crawlspaces where there is limited airflow or filtration.

Moisture: If the insulation is exposed to moisture, such as from a roof leak or condensation, it can cause the pink dye to fade or wash out, resulting in a gray appearance. Moisture can also lead to mold growth, which can further contribute to the discoloration of the insulation.

Chemical Reactions: Certain chemicals, such as those found in cleaning products or pesticides, can react with the pink dye in the insulation, causing it to turn gray. This is more common in older homes where these types of chemicals were more prevalent.

It's important to note that while gray insulation may not necessarily indicate a serious issue, it can be a sign of underlying problems such as moisture or dust accumulation. If you notice a significant amount of graying in your insulation, it's a good idea to inspect for potential moisture sources or excessive dust and address any underlying issues to prevent further damage or deterioration of the insulation.