Reuse

Pallets, boards, crates and containers

Reused material can make a great shelter, but only if you know where it came from and what state it is in. The checklist is your own check, not a certificate.

ISPM 15

What pallet marks mean

HT
heat treatment
MB
methyl bromide fumigation
Other codes
other approved treatments exist; check the current ISPM 15

An ISPM 15 mark confirms a phytosanitary treatment of wood packaging for international trade.

It does not confirm the pallet's later history and does not guarantee it was never exposed to oil, chemicals or other contamination.

International Plant Protection Convention (IPPC) · ISPM 15: Regulation of wood packaging material in international trade

Old treated timber

When not to use timber

Old structures may contain CCA-treated wood (chromium, copper, arsenic). It must not be burned, sawing needs dust protection, and Šapice rejects unknown old treated timber wherever an animal could chew or lick it.

U.S. Environmental Protection Agency · Chromated Arsenicals (CCA)

Checklist

Check the material before use

Reject if any applies
Confirm all
Check not complete

Answer every question before using the material.

Free, with permission

Where to find material

  • Clean foam boxes: fishmongers, pharmacies, labs, restaurants.
  • Plastic totes: donations, classifieds, neighbours.
  • Lumber offcuts: building supply stores, joinery workshops, contractors.
  • Animal welfare groups and TNR teams often have material or know who does.

Never take material without the owner's permission.

Alley Cat Allies · Providing Shelter

Before you take it

Quick check

  • Clean
  • Dry
  • Undamaged
  • Known previous use
  • No chemical contamination
  • Suits the intended role (structure, lining, insulation)
Add to “My workshop”
Models from reused material