Double glazed windows are the standard for UK homes, but how much do you really know about how they work and what to look for? This guide covers everything from the basics to the features that make a real difference.
What is Double Glazing?
Double glazing refers to a window made with two panes of glass separated by a gap. This gap, typically around 16mm, is filled with air or an inert gas like argon. The sealed unit is then fitted into a window frame made from uPVC, aluminium, or timber.
The principle is simple: the gap between the panes creates an insulating barrier that slows down heat transfer. This keeps warmth in during winter and reduces heat gain in summer.
How Does It Work?
Heat always moves from warm to cold. In a single-glazed window, heat from your warm room passes easily through the glass to the cold outside. Double glazing works by trapping a layer of gas (usually argon) between two panes of glass. Gas is a poor conductor of heat, so this layer acts as an effective insulating barrier, slowing down heat transfer.
Modern double-glazed units also feature Low-E (low emissivity) glass. This is a coating on one of the panes that reflects heat back into the room, further improving thermal performance.
Key Benefits of Double Glazing
Improved Energy Efficiency
By reducing heat loss, double-glazed windows help you use less energy to heat your home. This translates to lower energy bills and a reduced carbon footprint.
Enhanced Comfort
Say goodbye to cold spots and draughts near windows. Double glazing keeps the inner pane of glass warmer, making rooms more comfortable and reducing condensation.
Noise Reduction
The gap between the panes also helps to reduce noise from outside. If you live near a busy road or in a noisy area, double glazing can make a noticeable difference to your home's tranquillity.
Improved Security
Two panes of glass are harder to break than one. Combined with modern locking systems, double-glazed windows offer significantly better security than older single-glazed units.
Reduced Condensation
Condensation forms when warm, moist air meets a cold surface. Because the inner pane of a double-glazed window is warmer, condensation is far less likely to form on it.
What to Look for When Buying
- Energy Rating: Look for A-rated or higher windows for best thermal performance.
- Glazing Composition: Argon-filled units with Low-E glass are the most common high-performance option. Triple glazing offers even better insulation.
- Frame Material: uPVC offers great value and insulation. Aluminium provides slimmer sightlines and a modern look. Both are low maintenance.
- Quality of Seals: A quality window should have airtight seals to prevent draughts.
- Locking Systems: Multi-point locking is essential for security.
Is It Time to Upgrade?
If your home still has single glazing, or your double glazing is more than 15 years old, an upgrade could make a significant difference to your comfort and bills. Look out for signs of failed seals (condensation between panes), draughts, or difficulty operating the windows.
Expert Installation in Lincolnshire
At Rapide Frames, we supply and install high-quality double-glazed windows across Grimsby and Lincolnshire. Our expert team can help you choose the right windows for your home and budget.