Under oxygen-depleted conditions, such as in a landfill or several feet underground in a covered hole, the gypsum (calcium sulfate) in drywall can decompose to release the noxious gas hydrogen sulfide. … Only new (unpainted) drywall scrap should be used as a soil amendment.
What can I do with old drywall?
Some recycling centers will only take unused drywall, while others will take demolition materials. Stores that sell used building materials, such as Habitat for Humanity ReStores, may be able to take unused drywall. Call your local ReStore to see if it will accept it.
What materials should be avoided when composting?
- Meat and Fish Scraps. …
- Dairy, Fats, and Oils. …
- Plants or Wood Treated with Pesticides or Preservatives. …
- Black Walnut Tree Debris. …
- Diseased or Insect-Infested Plants. …
- Weeds that Have Gone to Seed. …
- Charcoal Ash. …
- Dog or Cat Waste.
