If you’re planning to upgrade your windows, double glazing is one of the most worthwhile investments you can make. It boosts energy efficiency, cuts down noise, and enhances home security. Partnering with a reliable Hertfordshire double glazing company or another trusted local installer can make the process smooth and stress-free. But before you get started, it’s important to understand the costs involved. This guide breaks down the factors affecting prices, typical costs, and tips to save money—helping you make the best decision for your home.
Why Double Glazing Is Worth the Investment
Double glazing has become a standard feature in UK homes for good reason. Here’s why it’s a smart choice:
1. Lower Energy Bills
Single-pane windows let heat escape, driving up your energy costs. Replacing them with double glazing could save you up to £145 per year on heating bills, depending on the size of your home and the windows replaced.
2. A Quieter Home
Double glazing reduces noise from traffic, neighbours, or barking dogs, creating a more peaceful environment indoors.
3. Increased Property Value
Energy-efficient, low-maintenance homes are more attractive to buyers. Installing double glazing adds value to your property and boosts its market appeal.
4. Improved Security
Double-glazed windows are tougher to break than single panes. Choosing toughened or laminated glass with advanced locks adds another layer of protection.
What Affects the Cost of Double Glazing?
Double glazing costs can vary widely depending on several factors, from the materials used to the complexity of the installation. Here’s what to consider:
1. Frame Materials
- uPVC: A popular choice for its affordability and durability, costing between £300–£1,200 per window.
- Aluminium: Sleek and modern, but more expensive at £500–£1,500 per window.
- Timber: Perfect for period properties, with prices ranging from £900–£2,700 per window. However, timber requires regular maintenance to prevent rot.
2. Window Styles
- Casement Windows: Simple and versatile, costing £300–£800 each.
- Sash Windows: Ideal for older homes, priced at £500–£1,500 per window.
- Tilt-and-Turn Windows: Practical and easy to clean, costing £400–£900 each.
- Bay or Bow Windows: Larger feature windows priced between £1,000–£3,000 depending on size.
3. Glass Types
- Standard Double Glazing: Usually included in most quotes.
- Low-Emissivity (Low-E) Glass: Improves insulation, adding £20–£50 per window.
- Toughened or Laminated Glass: Offers added security at an additional £100–£150 per window.
4. Installation Complexity
Straightforward replacements are cheaper than bespoke designs, like non-standard shapes or entirely new frame openings.
5. Regional Variations
Labour costs can differ significantly across the UK. Installations in London or the South East tend to be pricier than those in the North or Scotland.
6. Additional Features
Extras like decorative finishes, triple glazing, or enhanced locks can add £50–£500 per window.
Typical Double Glazing Costs in 2025
Here’s a snapshot of what you might pay for different materials and window styles:
| Material/Style | Cost Per Window | 8 Windows (Full House) | 12 Windows (Full House) |
| uPVC Casement | £300–£800 | £2,400–£6,400 | £3,600–£9,600 |
| Aluminium | £500–£1,500 | £4,000–£12,000 | £6,000–£18,000 |
| Timber Sash | £900–£2,700 | £7,200–£21,600 | £10,800–£32,400 |
How to Save Money on Double Glazing
Double glazing doesn’t have to break the bank. Here are some ways to reduce costs:
- Get Multiple Quotes
Compare quotes from at least three reputable installers to ensure you’re getting a fair price. - Look for Grants
Check for government schemes like ECO+ that may help fund energy-efficient home improvements. - Opt for Standard Designs
Custom windows can be stunning but are significantly more expensive. Standard sizes are much more budget-friendly. - Book Off-Season Installations
Many companies offer discounts during quieter months, such as winter, to keep their schedules full.
Maintenance and Lifespan
With proper care, double-glazed windows can last 20 to 35 years. Maintenance varies depending on the material:
- uPVC: Clean with soapy water to keep it looking fresh.
- Aluminium: Occasional polishing maintains its sleek finish.
- Timber: Sand, paint, or varnish regularly to protect against rot and prolong its life.
Environmental Benefits
Double glazing doesn’t just benefit your home—it’s good for the planet too. By improving insulation, it reduces energy consumption and lowers your carbon footprint. For an eco-friendly upgrade, consider frames made from recycled aluminium or FSC-certified timber.
FAQs About Double Glazing Costs
- Is double glazing worth it?
Yes. The initial investment is offset by energy savings, increased comfort, and boosted property value. - Can I install double glazing myself?
While possible, professional installation ensures a better fit, proper insulation, and a valid warranty.
Final Thoughts
Double glazing is a practical upgrade that enhances energy efficiency, security, and overall comfort in your home. By understanding the costs, exploring your options, and working with a trusted installer—such as a double glazing company—you can make an informed decision that suits both your budget and style.
