Window glass, hinges, locks, fasteners and dry insulation are worth recovering because each is hard to make from scratch, but each carries a hazard: glass cuts, insulation fibres irritate skin and lungs, and old insulation may be asbestos. Take glass out whole with the pane taped, sort hardware by type and size as you go, and reuse insulation only when it is dry and you are sure what it is.
Part of Building Material Recovery
These are the small, specialised materials of a building: the ones that make a shelter weatherproof, lockable and warm. Each takes patience to remove and is lost entirely if rushed.
The Specialty Materials Reward Care More Than Force
Glass. Window glass is remarkably difficult to produce from scratch, so salvaged panes, even small ones, are valuable for greenhouses, cold frames, solar water heaters and windows (parent article). Removal and handling are on Glass Salvage & Handling; making glass is on Flat Glass.
Hardware and fasteners. Hinges, locks, screws, bolts, nails and electrical fittings are standardised and directly reusable. Bring containers and sort as you go; the detail is on Hardware & Fasteners.
Insulation and roofing. Fibreglass batts, rigid foam and metal roofing can be reused if dry and intact. Some old insulation contains asbestos, and some old roofing is brittle. See Insulation & Roofing Materials.
What You Need
- Duct tape and a putty knife and pry bar for glass.
- Cut-resistant gloves, eye protection and a respirator.
- Buckets, cans and bags, one per hardware type.
- A safe, flat, padded place to lay glass on edge.
Method: Remove Gently, Sort Immediately
Step 1: Identify what you are looking at. Glass pane, hardware or insulation; for insulation, confirm it is not asbestos using the date and type guide on Asbestos, Lead Paint & Other Hazards.
Step 2: Glass first, while the frame is intact. Tape the pane, remove the window stops, lift the pane out and carry it vertically.
Step 3: Hardware as you go. Drop each type into its own container the moment you remove it, so nothing is lost in debris.
Step 4: Insulation last, and only if dry and clean.
Step 5: Carry out in the order of fragility. Glass first and alone, then hardware, then insulation and roofing.
Common Mistakes
- Breaking a pane to get at the frame. You lose the glass and create shards.
- Letting hardware fall into debris. Small parts are lost for good.
- Reusing wet or mouldy insulation. It has lost its value and grows mould.
- Carrying glass flat. Glass is much stronger against edge-on forces than against flat bending (parent article).
Safety
Broken glass, irritant fibres and hidden asbestos
Glass cuts deeply and shards are hard to see in debris; tape panes, wear cut-resistant gloves and eye protection, and sweep carefully. Fibreglass irritates skin and lungs, so wear gloves, long sleeves and a respirator. Old insulation, pipe wrap and similar material may contain asbestos and must be left undisturbed. A cut from rusty hardware should be washed promptly.
What’s Next
- Learn next: Glass Salvage & Handling — taking panes out whole
- Combine with: Hardware & Fasteners — sorting what you pull