can you compost drywall?
No — home piles can't handle drywall: paint, joint compound, and mold tag along, and wet gypsum breeds rotten-egg odors.
which bins can take it?
- hot pile no
- cold pile no
- worm bin no
- bokashi no
- tumbler no
- curbside no
- curbside: Organics programs treat drywall as construction debris — it has its own C&D recycling stream.
why?
Drywall's core is gypsum — calcium sulfate — sandwiched in paper, and in a soggy, airless pile sulfate-reducing bacteria convert that sulfate into hydrogen sulfide, the classic rotten-egg stink. Demolition board adds paint (potentially lead-based before 1978), joint compound, and whatever grew inside the wall, none of which belongs in garden compost.
watch out for
- Clean new-construction scrap is sometimes crushed into farm fields as a gypsum source, but that's a tested agricultural practice — not a compost-pile shortcut.
what to do instead
Many construction-and-demolition recyclers accept clean, unpainted drywall scrap and turn it into new board or agricultural gypsum. Painted or demolition drywall goes to the landfill — and pre-1978 painted board should be handled as potential lead waste.
often confused with
- Garden gypsum — Bagged gypsum amendment is the same mineral without paper, paint, or additives — buy that if your soil genuinely needs calcium and sulfur.
quick answers
Is drywall dust okay to spread in the garden?
No. Even new-board sanding dust loads soil with sulfate salts, and joint compound made before about 1980 can contain asbestos — never sand, sweep, or spread dust from old walls. Bag renovation dust for the trash.
Doesn't gypsum loosen clay soil?
Only in sodic (high-sodium) soils, which are rare outside the arid West. In typical clay, gypsum doesn't improve structure — organic matter does — so drywall isn't a free soil conditioner even in theory.