Broken window: safe temporary fix and cleanup¶
Emergency numbers differ by country. This page uses 911, the number for the United States and Canada. Many other countries use 112, 999, or another number. Find the number for your country.
A broken residential or commercial window compromises the structural envelope of a building, exposing occupants to severe laceration hazards, outdoor weather extremes, wind-driven rain, and opportunistic unlawful entry. Whether caused by violent windstorm debris, vandalism, a vehicular accident, or an attempted burglary, a shattered window demands immediate, systematic stabilization.
This guide provides operational emergency procedures based on structural safety standards from the Federal Emergency Management Agency (FEMA), the International Residential Code (IRC Section R308), the Occupational Safety and Health Administration (OSHA), and professional glazing standards to safely extract hazardous glass shards, execute non-damaging tension-clamp board-ups, weatherproof openings, and navigate insurance claims.
Do this now: first 15 minutes response¶
If a window shatters in your home or facility:
- Evacuate children and pets from the room immediately. Glass fragments travel up to 6 meters (20 feet) from the impact site upon fracturing. Put on thick, hard-soled shoes before stepping into the room to protect your feet from micro-shards.
- Determine if a crime has occurred. If the window was broken during an attempted break-in, home invasion, or vandalism, do not touch the glass or enter the room. Retreat to a secure location and call your local emergency number (911 in the United States and Canada, 112 in the European Union, 999 in the United Kingdom). Preserve the sill for forensic fingerprint and DNA analysis.
- Check for severe lacerations. If an occupant was injured by flying glass, inspect for deep puncture wounds or arterial bleeding. Never pull out an embedded glass shard stuck deep in tissue; stabilize it in place with bulky dressings and call for emergency medical assistance.
- Don protective safety gear before touching glass. Wear heavy leather work gloves, puncture-resistant shoes, long canvas trousers, and ANSI-certified safety glasses. Never handle broken glass with bare hands or thin disposable rubber gloves.
- Photograph the damage thoroughly from multiple angles before disturbing the scene, capturing the broken glass on the floor, the damaged frame, and the point of impact for insurance claims.
- Seal the opening temporarily using plywood sheeting or 6-mil heavy-duty polyethylene plastic to prevent rain ingress and secure the home against intrusion.
Window emergency response and board-up flowchart¶
WINDOW SHATTERS / STRUCTURAL BREACH
│
Was the break caused by a CRIME
(burglary, vandalism, home invasion)?
│
┌───────────────┴───────────────┐
YES NO
│ │
┌────────┴────────┐ ┌────────┴────────┐
│ CRIME SCENE │ │ ACCIDENT / STORM│
│ PRESERVATION │ │ CLEANUP & SECURE│
└────────┬────────┘ └────────┬────────┘
│ │
1. DO NOT touch glass 1. Put on thick boots & PPE
2. Evacuate room immediately 2. Check occupants for wounds
3. Call 911 / 112 / 999 3. Photograph damage for claim
4. Preserve sill for prints 4. Clear loose glass from frame
5. Await police clearance 5. Vacuum and sweep floor
│ │
└───────────────┬───────────────┘
│
SELECT BOARD-UP METHOD
│
┌──────────────────────────┴──────────────────────────┐
│ │
┌────────┴────────┐ ┌────────┴────────┐
│ TENSION-CLAMP │ │ DIRECT SCREW │
│ METHOD (BEST) │ │ METHOD │
└────────┬────────┘ └────────┬────────┘
│ │
1. For vinyl, aluminum, or 1. For solid timber frames
masonry windows 2. Plywood sheet cut 5 cm
2. Two sheets of 12 mm CDX larger than frame
plywood (inside & outside) 3. Heavy 3-inch exterior
3. Connected by 3/8-inch construction screws
galvanized carriage bolts 4. Seal perimeter with
4. Zero frame screw holes exterior flashing tape
5. Cannot be unbolted from outside │
│ │
└──────────────────────────┬──────────────────────────┘
│
Arrange professional glazing repair
The physics and hazards of broken architectural glass¶
Residential and commercial buildings utilize three distinct formulations of glass, each exhibiting vastly different fracture behaviors:
ARCHITECTURAL GLASS TYPES AND FRACTURE BEHAVIORS
┌──────────────────────┬──────────────────────┬──────────────────────┐
│ Glass Formulation │ Fracture Pattern │ Primary Danger │
├──────────────────────┼──────────────────────┼──────────────────────┤
│ Annealed / Float │ Large, jagged, dagger-│ Severe lacerations; │
│ (Standard Window) │ like razor shards │ severed arteries │
├──────────────────────┼──────────────────────┼──────────────────────┤
│ Tempered Safety │ Thousands of small, │ Micro-slivers in │
│ (Fully Heat-Treated) │ blunt granular cubes │ paws; flying debris │
├──────────────────────┼──────────────────────┼──────────────────────┤
│ Laminated Safety │ Fine spiderweb cracks│ Retains sheet shape; │
│ (PVB Interlayer) │ bonded to interlayer │ sharp surface edges │
└──────────────────────┴──────────────────────┴──────────────────────┘
Annealed (float) glass¶
Found in older homes and non-hazardous window locations. When annealed glass breaks, it fractures into massive, razor-sharp shards that act as falling guillotines. Shards hanging loosely in a window frame can drop without warning, slicing through tendons, nerves, and major femoral or brachial arteries in a fraction of a second.
Tempered safety glass¶
Required by modern building codes in high-risk zones (such as patio doors, bathroom windows, and low-standing glass). Tempered glass is engineered under high surface compression. Upon impact, internal tension releases instantly, shattering the entire sheet into thousands of small, granular, dice-sized cubes. While tempered glass reduces fatal lacerations, the granular cubes spray outward with significant kinetic force, and tiny razor slivers can embed deeply in skin and pet paws.
Laminated safety glass¶
Constructed by bonding two layers of glass around an internal polyvinyl butyral (PVB) plastic membrane. When struck, the glass cracks into a fine spiderweb pattern but remains firmly adhered to the plastic core, maintaining building envelope integrity and preventing shards from falling.
Safe glass removal and extraction protocol¶
Before covering a broken window opening, all hanging glass must be removed safely to prevent injury during boarding:
SAFE SHARD EXTRACTION SEQUENCE
[ 1. TOP SHARDS ] ──► Remove upper hanging dagger shards first
│
[ 2. SIDE EDGES ] ──► Tap and pry lateral vertical shards
│
[ 3. BOTTOM SILL ] ──► Clear bottom window track and sill
│
[ 4. SASH VACUUM ] ──► Vacuum microscopic slivers from frame
The Top-to-Bottom extraction rule¶
Always extract glass hanging from the top of the window frame first: - Why top-first matters: If you clear glass from the bottom or sides of the frame while a heavy jagged shard is hanging from the top sash, vibrations from your tools can dislodge the top shard, causing it to fall directly onto your hands, wrists, or forearms. - Use pliers, never bare hands: Grasp hanging shards with heavy adjustable locking pliers. Gently wiggle the shard back and forth until the glass breaks free from the glazing putty or vinyl bead. - Work from inside: Always extract glass while standing firmly inside the home. Never lean outward over high window sills, and never stand beneath an exterior broken window where falling glass can strike you.
Comprehensive indoor glass cleanup¶
Cleaning broken glass requires a multi-stage process to eliminate both large structural shards and invisible microscopic slivers:
- Pick up large shards manually: Wearing heavy leather work gloves, place large glass pieces directly into a heavy cardboard box or rigid 5-gallon plastic bucket. Never place broken glass into standard thin plastic trash bags: heavy shards slice cleanly through plastic bags and will cut your legs when the bag is carried.
- Sweep perimeter to center: Use a stiff-bristled broom and a metal dustpan. Begin sweeping at the outermost walls of the room, working inward toward the impact center. Push the broom with slow, deliberate strokes to prevent glass dust from becoming airborne.
- Capture microscopic slivers with adhesive: Tiny glass slivers blend invisibly into carpet fibers, hardwood crevices, and baseboard seams. Use a wide adhesive lint roller, heavy-duty duct tape loops wrapped around your gloved hand, or a damp folded paper towel pressed firmly against the flooring to pick up remaining micro-particles.
- Vacuum with canister hose only: Never use an upright vacuum cleaner equipped with a rotating beater brush. A spinning brush roll strikes glass shards at high speed, flinging sharp fragments across the room and shredding the vacuum drive belt. Use a canister vacuum or wet-dry shop vacuum equipped with a bare hose and utility nozzle. Install a high-efficiency particulate air (HEPA) filter to trap fine silica glass dust.
- Inspect household pets: Check dog and cat paws for limping, bleeding, or licking. Wipe down pet bedding and human footwear soles outside before walking through uncompromised areas of the house.
Professional emergency board-up techniques¶
Securing the opening requires balancing physical security against structural damage to the existing window frame.
EMERGENCY WINDOW COVERING METHOD COMPARISON
┌──────────────────────┬──────────────────────┬──────────────────────┐
│ Method │ Security Level │ Frame Impact │
├──────────────────────┼──────────────────────┼──────────────────────┤
│ Tension-Clamp │ Highest (Burglar- │ ZERO DAMAGE; no holes│
│ (Sandwich Method) │ proof barrier) │ drilled into frame │
├──────────────────────┼──────────────────────┼──────────────────────┤
│ Direct Face-Screw │ High (Solid physical │ Creates permanent │
│ (Timber Frames Only) │ barrier) │ screw holes in frame │
├──────────────────────┼──────────────────────┼──────────────────────┤
│ 6-Mil Polyethylene │ Weather-only (Zero │ Zero damage; uses │
│ Plastic Sheeting │ physical security) │ exterior tape only │
└──────────────────────┴──────────────────────┴──────────────────────┘
Method 1: The tension-clamp sandwich method (recommended)¶
For modern vinyl, aluminum, or composite window frames, driving screws directly into the frame destroys expensive sashes and voids manufacturer warranties. The tension-clamp method secures the window without drilling a single hole:
- Measure the window opening: Measure the interior height and width of the window frame opening.
- Cut two plywood sheets: Cut two sheets of 12-millimeter (½-inch) CDX exterior plywood approximately 5 centimeters (2 inches) smaller than the overall frame opening so they fit snugly inside the frame reveals.
- Cut 2x4 lumber backing cleats: Cut two lengths of 2x4 framing lumber slightly shorter than the width of the plywood sheets.
- Drill carriage bolt holes: Drill two 10-millimeter (⅜-inch) holes through both sheets of plywood and the 2x4 backing cleats.
- Assemble the clamp:
- Position one sheet of plywood on the outside of the window opening.
- Insert ⅜-inch galvanized carriage bolts from the exterior facing inward (the smooth, rounded heads of carriage bolts remain outside and cannot be unscrewed by intruders).
- Position the second sheet of plywood and the 2x4 lumber cleats on the interior side over the protruding bolt threads.
- Install washers and thread nuts onto the carriage bolts from inside the room.
- Tighten the bolts: Tighten the nuts firmly using a socket wrench. The clamping action sandwiches the window frame tightly between the two plywood sheets, holding the assembly rigidly in place through friction. This creates a secure, weatherproof barrier that cannot be removed from outside.
Method 2: Weatherproofing with 6-mil polyethylene plastic¶
If plywood is unavailable or if physical security is not a primary concern (such as an upper-story window in an occupied, secure building): - Material: Use heavy 6-mil polyethylene construction sheeting. Never use thin household plastic wrap or disposable garbage bags, which tear instantly in moderate winds. - Installation: Cut the plastic 15 centimeters (6 inches) larger than the window frame on all sides. Secure the plastic to the frame using heavy exterior-grade flashing tape (such as Gorilla tape or asphalt flashing tape). - Dual-layer air gap: For thermal insulation in freezing weather, tape one layer of plastic to the exterior window casing and a second layer to the interior drywall trim. The dead air space between the two plastic sheets acts as temporary double glazing, preventing extreme heat loss.
Building codes and glazing standards for replacement¶
When ordering replacement glass, building owners must comply with mandatory safety regulations:
- IRC Section R308 safety glass mandates: The International Residential Code mandates that replacement glass must be certified safety glass (tempered or laminated) in specific hazardous locations:
- Any glazing located within 60 centimeters (24 inches) of an exterior door hinge or latch.
- Glazing in any door enclosure (sliding glass patio doors, storm doors, French doors).
- Any window pane larger than 0.84 square meters (9 square feet) where the bottom edge of the glass is less than 45 centimeters (18 inches) above the finished floor level.
- All glazing enclosing showers, bathtubs, hot tubs, saunas, and swimming pools.
- Insulated Glass Units (IGUs): Most modern homes utilize sealed double-pane or triple-pane IGUs filled with argon gas and coated with Low-E microscopic metallic films. Replacing a single cracked pane requires ordering an entirely new factory-sealed IGU from a glazier, which typically requires 3 to 10 business days for custom fabrication.
Insurance documentation and tenant rights¶
- Insurance claims: Photograph all damage thoroughly before cleanup. Keep receipts for all emergency board-up materials (plywood, lumber, bolts, plastic, tape) and professional emergency board-up contractor invoices. Most homeowner and commercial property policies cover emergency mitigation costs under the "Reasonable Repairs" clause to prevent secondary water damage.
- Tenant protections: In residential rental properties, a broken exterior window breaches the Implied Warranty of Habitability. Landlords are legally required under state and municipal housing codes to secure the opening immediately (within 24 hours) and complete permanent glazing replacement within a reasonable timeframe.
Broken window emergency checklist¶
- Evacuate children and pets; put on thick, hard-soled shoes.
- If crime suspected, call 911 or local police; preserve sill fingerprints.
- Don full PPE: heavy leather gloves, safety glasses, canvas clothing.
- Photograph damage, frame, point of impact, and floor glass.
- Remove loose hanging shards from frame, starting from the top down.
- Sweep floor from perimeter inward; vacuum with bare hose attachment.
- Secure opening with interior tension-clamp plywood or 6-mil plastic.
- Contact local glass glazier and home insurance claim department.
Frequently asked questions¶
How do I board up a broken window without damaging the window frame?¶
Use the tension-clamp sandwich method. Cut two sheets of 12-millimeter (½-inch) plywood and two lengths of 2x4 lumber slightly smaller than the window opening. Drill holes through both sheets and insert ⅜-inch carriage bolts from the exterior to the interior. Tighten nuts onto the bolts from inside the room. This clamps the plywood firmly against the window frame using pressure alone, securing the opening without driving a single screw into vinyl or aluminum frames.
What should I do if a large piece of glass is stuck deep in someone skin?¶
Never pull out an embedded glass shard. The glass acts as a temporary plug holding damaged blood vessels closed; pulling it out can trigger catastrophic, uncontrollable arterial bleeding. Leave the glass in place, stabilize it by packing thick, rolled gauze or clean towels around both sides of the object, wrap bandages around the packing without pressing down on the glass, and call your local emergency number immediately.
What kind of trash bag or container should I use for broken glass?¶
Never put broken glass into standard plastic garbage bags, as sharp edges slice through thin plastic and cause severe cuts to anyone carrying the bag. Place broken glass directly into a rigid cardboard box, a plastic 5-gallon bucket, or a metal trash can. Seal the cardboard box with heavy packing tape, label it clearly with a permanent marker stating "BROKEN GLASS", and dispose of it according to municipal waste guidelines.
Can I use a regular vacuum cleaner to clean up broken glass?¶
Do not use an upright vacuum cleaner with a spinning beater brush. The rotating brush bar strikes glass at high speeds, flinging razor-sharp fragments across the room and damaging internal vacuum mechanisms. Use a canister vacuum or wet-dry shop vacuum using only a bare hose attachment. Run an adhesive lint roller or duct tape loops across carpets and floors afterward to capture microscopic glass slivers.
Is my landlord responsible for fixing a broken window if I rent?¶
Yes. Under the legal doctrine of the Implied Warranty of Habitability, landlords are legally responsible for maintaining the weather-tight structural integrity and physical security of residential rental properties. If a window breaks, notify your landlord immediately in writing. Landlords must secure the opening with an emergency board-up within 24 hours and arrange permanent glass replacement promptly.