A smashed pane is not something to leave until morning. If you need to secure a broken window overnight, the priority is simple: keep people away from sharp glass, prevent easy access to the property, and stop rain or wind causing further damage. A proper emergency boarding-up service can make the building secure that same night, whether the damage is at a home, rental property, shop or office.
The right response depends on the size and position of the window, whether the frame is damaged, and whether there has been a break-in. A small crack in an upstairs pane is different from a shattered ground-floor shop front. Either way, avoid taking risks with loose glass or relying on a light sheet of plastic as your only security measure.
Secure a broken window overnight: deal with the immediate risks
First, keep children, pets, customers and anyone not helping well away from the area. Broken glass can fall from the frame long after the initial impact, especially when a door closes nearby or the weather changes. Put on sturdy shoes and gloves before going near it, but do not climb through the opening or try to hold unstable glass in place.
If a burglary has just taken place, do not touch the frame, broken glass or anything that may be evidence unless it is necessary to make the space safe. Contact the police if there is an immediate risk, signs that someone remains on the premises, or a crime needs reporting. Take clear photographs of the damage once it is safe to do so. They can help with insurance, landlord records and arranging a replacement unit.
If the window is exposed to rain, move furniture, stock, electrical items and soft furnishings away from the opening. Draw curtains or blinds only if they can be closed without handling glass. For a business premises, secure cash, keys, computers and high-value items in an internal locked room where possible.
Why temporary plastic is rarely enough
Plastic sheeting can reduce draughts and keep out a little rain, but it is not a security repair. It tears easily, can come loose in wind and tells an opportunist that the property is vulnerable. Tape can also damage paint, UPVC and timber finishes, and may not adhere at all to a damp or dusty frame.
For a very small internal crack, a temporary covering may be sufficient until normal glazing work can be booked. For a broken pane, a smashed door panel, an accessible window or any opening large enough for a person to reach through, boarding is the safer option. The boarding needs to be fixed securely around the opening, not simply pressed against it.
The same applies to double-glazed units. Even if one layer appears intact, a fractured external pane can leave sharp edges and may compromise the whole sealed unit. Do not assume it is secure because the glass has not fallen out completely.
When to call for emergency boarding-up
Call for immediate help when the property cannot be locked and secured, the opening is at ground level, weather is entering, or there is a danger from loose glass. A 24-hour boarding-up technician can assess the window, remove hazardous loose pieces where appropriate and fit a solid temporary barrier while replacement glazing is arranged.
This is particularly useful for landlords and letting agents managing an empty property. A vacant flat or house with a damaged window can quickly become a target for trespass, theft or further vandalism. Shops also need a fast response after damage to a front window, as an unprotected frontage risks stock loss and may prevent safe opening the following day.
A professional attending after a break-in should also check the wider security picture. Windows are often damaged alongside door locks, handles or cylinders. There is little value in boarding the glass if the rear door has a failed multipoint lock or a snapped euro cylinder that still leaves the building insecure.
What a secure overnight board should achieve
A proper temporary board does more than cover the hole. It should stop straightforward entry, shield the interior from the weather and stay in place until a permanent repair is completed. The technician will consider the construction of the frame, the size of the opening and whether fixing into the surrounding structure is required.
There are trade-offs. A board fitted to a listed building, a heritage timber frame or a delicate shop front needs a careful approach to avoid unnecessary damage. On a standard domestic window, speed and secure fixing may be the main concern. On a commercial premises, maintaining access for staff, emergency exits and alarm systems may need to be considered before the board is fitted.
Do not block a required fire exit without an alternative safe exit in place. If the damaged window is part of an escape route, explain this when arranging attendance. The temporary solution has to protect the property without creating a new safety problem inside it.
Avoid these overnight mistakes
It is tempting to improvise when it is late, cold or raining. Some measures can make the situation worse, or leave you with a costly frame repair later.
- Do not use cardboard, bin bags or a curtain as security. They provide privacy at best, not protection.
- Do not hammer nails or screws through a UPVC frame unless a trained professional has assessed it. This can damage the frame, seals, drainage channels and locking parts.
- Do not sweep glass into a general indoor area or leave it where tyres, footwear or pets can pick it up. Use a rigid container for larger pieces and keep the area isolated.
- Do not leave keys, handbags, tools, tills or vehicle keys within reach of the opening, even if you believe the gap is too small to enter.
- Do not wait until morning simply because the property is occupied. Overnight is when an unsecured ground-floor window is most likely to be tested.
Protecting the property once it is boarded
After the opening has been secured, check every accessible door and window before settling for the night. Lock internal doors to rooms containing valuables, close blinds where possible, and leave sensible lighting on inside or outside the property. If an alarm has been triggered, make sure it is reset only after the area is safe and the cause has been dealt with.
For rental homes, record the damage, the time it was discovered and the temporary work completed. This gives tenants reassurance and helps landlords plan the permanent repair. For commercial sites, make a note of any damaged stock, interrupted access, alarm faults and opening arrangements for staff the next day.
It is also worth asking when permanent glazing can be measured and fitted. Emergency boarding protects the building, but it is a temporary measure. A replacement pane or sealed unit restores light, insulation and the appearance of the property.
Local emergency help when security cannot wait
At Locksmiths Gloucester, emergency boarding-up is handled as a property-security job, not just a glazing problem. The aim is to secure the opening quickly, assess nearby locks or access points, and avoid creating unnecessary damage while the permanent repair is arranged. For homes, shops and managed properties across Gloucestershire, that means practical help at the point when a broken window cannot safely be left until morning.
If you are facing a damaged pane tonight, keep clear of the glass, protect people and valuables, and arrange a secure temporary repair rather than trusting a makeshift cover. A properly boarded opening gives you the breathing space to deal with glazing, insurance and any follow-up security work in daylight.