A broken window after a break-in needs fast action. In Hampstead NW3, many homes still have older sash windows, ageing locks, and fragile glazing that can quickly become unsafe after forced entry. At Hampstead Sash Window Repairs & Emergency Glazing, we regularly help homeowners secure damaged properties, arrange emergency boarding-up, and repair broken sash windows before the problem gets worse. This guide explains what to do immediately after a burglary, the risks of delaying repairs, and how to protect your property properly.
Safety comes first after a window break-in.
Broken glass can spread across floors, stairs, entrances, and window frames. Older sash windows may also become loose after impact.
Do this immediately:
The Metropolitan Police continues advising homeowners to improve window security and locks because windows remain a common entry point during burglaries.
Many Hampstead properties still use traditional timber sash windows. After forced entry, the damage is often deeper than the broken glass itself.
Engineers regularly find:
Temporary boarding-up alone may not solve these problems.
Boarding-up does more than cover the opening.
It helps protect the property from:
This becomes more important during overnight emergencies.
Many glazing companies across North London now offer 24-hour emergency response because burglary-related window damage has increased in residential areas.
In many NW3 break-ins, burglars target:
That is why proper repairs often include both glazing and frame checks.
Many Hampstead homeowners now replace older glass with stronger safety glazing.
Popular upgrades include:
Laminated glass stays together after impact. This helps slow forced entry and reduces dangerous falling shards.
This is especially useful for large street-facing sash windows commonly found across NW3 properties.
Some insurers now also recommend stronger glazing and upgraded locks for higher-value London homes.
Waiting too long after a break-in can make the repair more expensive.
Rain can warp timber. Damp can spread around the frame. Broken glass can leave the room exposed to cold air, water, and further security risks.
Common extra damage includes:
Emergency boarding-up in the UK usually starts from around £100, and can rise to £350+ depending on window size, damage, location, and urgency.
Glass replacement costs also vary. Checkatrade lists average supply-and-fit costs at around £110 for single glazing and £120 for double glazing. Replacement double glazing units commonly sit around £225–£275 per unit.
Sash window repair can cost more when cords, timber, glazing beads or rotten sections are damaged. London sash repair guides list basic sash repairs around £150–£300 per window, painting and re-glazing around £200–£500, and rotten wood repair around £400–£800 per window.
Older Hampstead sash windows may cost more because matching timber sections, slim glazing bars, and heritage-style profiles often needs specialist repair.
Many Victorian and Edwardian sash windows were not built for modern security glazing.
Older systems often contain:
After a break-in, replacing only the glass may leave hidden structural problems behind.
Professionals usually inspect:
This is common in older Hampstead streets near Frognal, Belsize Park, and Hampstead Heath where original sash windows remain in place.
Contact
07391788010
info@hampsteadsashwindowrepairs.co.uk
24 Hour Call Out
What should I do first after a window break-in?
Keep people away from the glass, take photos, report the incident if needed, and call an emergency glazier.
Should I board up a broken window?
Yes. Boarding-up helps secure the property, reduce weather damage, and prevent further access.
Can sash windows be repaired after a break-in?
Yes. Glass, locks, cords, timber sections, and frames can often be repaired without full replacement.
What glass is best after a break-in?
Laminated safety glass is often recommended because it holds together better after impact.
How quickly should broken glass be replaced?
As soon as possible, especially if the window is unsafe, exposed to weather or cannot be locked.
We recommend ‘Hampstead Glass & Glazing’ at 45 Hampstead High St, NW3.
Yes! We secure properties with professional boarding-up solutions
Yes! We work with insurers to assist with claims.