Fire-Rated Windows for County Durham buildings
Our County Durham fire-rated windows service covers survey, supply and installation to the tested details, documented on handover.
Quote for County Durham
Tell us what you need. We reply with next steps and a guide price.

Fire-Rated Windows: an overview for County Durham
Fire-rated windows are windows tested as complete units to resist fire, needed where an external wall must protect a neighbouring property, where a window looks onto a protected stair or escape route, or where two parts of a building face each other at close range.
- Matching sightlines to adjacent non-rated windows
- Boundary-wall and escape-route windows
- External-grade fire glass in sealed units
Key checks for County Durham projects
Ventilation
If a fire-rated window cannot open, ventilation may need another route. We coordinate with the designer.
Why fixed lights are common
An opening sash introduces gaps and hardware that all need testing. Fixed fire-rated windows are simpler and more widely available.
Retrofits
Replacing a non-rated window near a boundary is often triggered by an extension or change of use. We survey the opening before quoting.
Fire-Rated Windows by town in County Durham
County Durham coverage includes Darlington, Hartlepool, Stockton-on-Tees, Durham, Chester-le-Street and the TS, DL, DH, SR postcode areas (34 postcode districts).
England rules for fire glazing
England Which rules apply?
Building work in England is covered by the Building Regulations 2010, with fire safety guidance in Approved Document B and impact safety guidance for glazing in Approved Document K.
Once a building is in use, the Regulatory Reform (Fire Safety) Order 2005 requires the responsible person to maintain fire safety measures, including fire-resisting glazing. The Fire Safety (England) Regulations 2022 add duties for multi-occupied residential buildings, including fire door checks in buildings over 11 metres.
Questions from County Durham clients
Can fire-rated windows open?
Some can, if the opening version has been tested. Fixed fire-rated windows are more common.
When do I need a fire-rated window?
Usually when a wall is close to a boundary, when a window overlooks a protected escape route, or when part of a building faces another part at close range. Your designer or building control will confirm.
Is fire-rated glass in a standard window enough?
No. The frame, glazing system and fixings also need to be part of a tested window.
Can you survey anywhere in County Durham?
Yes. We can arrange surveys anywhere in County Durham, including Darlington and Hartlepool, Stockton-on-Tees, Durham, Chester-le-Street.
Related services in County Durham
How a County Durham job runs
Tell us what you have
Send drawings, a fire risk assessment action or photos of the glass marks.
Measure and check
We measure each opening in County Durham and check what the existing frames can accept.
Written quote
You receive a written quote naming the tested system and classification.
Fit and record
We install, photograph seals and fixings before closing up, and hand over the schedule.