Secondary Glazing for Casement Windows
Casement windows are the most common window type in modern London homes. If yours feel draughty, let in traffic noise, or send your heating bills soaring, secondary glazing is the simplest fix -- no need to rip anything out. We add a slim, barely-visible panel on the inside that keeps warmth in and noise out.
What You'll Actually Notice After Installation
Forget the jargon -- here's what secondary glazing does for your home in plain English.
Your rooms will feel 3 to 5 degrees warmer. That cold spot by the window? Gone. Expect to save around £68 per window per year on heating.
Road noise, sirens, neighbours -- our glazing cuts outside sound by up to 80%. You'll finally be able to sleep with the curtains open.
That chilly breeze whistling through the frames? The secondary panel creates an airtight seal that stops draughts dead.
A second layer of glass is a second barrier for intruders. Optional toughened or laminated glass makes it even harder to break through.
We Match the Way Your Windows Open
Every casement window opens differently. We design the secondary panel to work with your window -- not against it -- so you never lose any functionality.
The classic casement: hinged on one side, opens inward or outward.
- We fit a matching hinged secondary panel so both layers open the same way
- Easy to swing open for cleaning or fresh air
- Slim profile sits just 20mm from the reveal
Hinged at the top, tilts outward for ventilation.
- Bottom-hinged secondary panel complements the opening direction
- Ventilation still works perfectly -- just open both layers
- Weather-sealed edges prevent rain ingress
Multi-function windows that tilt inward and swing fully open.
- Dual-action secondary panel preserves both tilt and turn modes
- You keep full access for cleaning from inside the room
- Multi-point locking adds a serious layer of security
Questions We Get Asked a Lot
"Will I still be able to open my windows normally?"
Yes. We design every panel to match the way your casement opens. Side-hinged, top-hung, tilt & turn -- everything still works exactly as before. The secondary panel simply opens alongside your original window.
"Will it look bulky or change the appearance of my windows?"
Not at all. Our frames are just 20-25mm slim and sit inside the window reveal. From the outside, your windows look completely unchanged. From inside, most visitors never even notice.
"How long does installation take?"
Most homes are completed in a single day. We survey first, manufacture to your exact measurements, then return to fit everything. There is no mess, no scaffolding, and no disruption to your daily routine.
Upgrade Your Casement Windows
Book a free survey and get a no-obligation quote. We'll show you exactly what secondary glazing will do for your home.