Choosing the right double glazing company is crucial when upgrading your home’s windows and doors. With so many double glazing companies on the market, it can be difficult to know who offers the best quality, service, and value for money. Before making a commitment, it’s important to understand what to look for in a provider so you can avoid poor craftsmanship, hidden costs, and future headaches. This guide will help you compare double glazing companies effectively and make a confident buying decision.
Understand the Basics of Double Glazing
Double glazing involves two panes of glass separated by a layer of gas or air. This design improves thermal efficiency, reduces noise, and boosts security. The materials, manufacturing quality, and installation process all contribute to the effectiveness of the final product. That’s why it’s important to dig deeper into the offerings of each company rather than making a choice based on price alone.
Reputation and Reviews
Research Online Testimonials
Before selecting a company, start by researching online reviews on platforms such as Trustpilot, Google Reviews, or local directories. Pay attention not just to star ratings but also to what customers are saying about service, installation, and aftercare. Look for patterns—consistent praise or recurring complaints can tell you a lot about a company’s reliability.
Word of Mouth Recommendations
Ask friends, family, or neighbours who have had double glazing work done recently. Personal recommendations are often more trustworthy than anonymous online comments. You’ll get honest opinions about both the process and the final result.
Company Accreditations and Certifications
Legitimate double glazing companies should have accreditations from recognised industry bodies. Look for certifications such as FENSA (Fenestration Self-Assessment Scheme), CERTASS, or the Glass and Glazing Federation (GGF). These organisations ensure that the company adheres to national standards and regulations for safety, performance, and energy efficiency.
Having these certifications also ensures that the installer is qualified and that your installation will comply with building regulations. Additionally, FENSA or CERTASS registration often means you won’t need to apply for building control approval separately, saving you time and stress.
Product Quality and Range
Frame Materials
Different companies offer varying quality in materials. The most common types are uPVC, aluminium, and timber. Each has its pros and cons:
- uPVC: Affordable, low maintenance, and energy-efficient
- Aluminium: Sleek, modern, strong, and durable
- Timber: Classic appearance, natural insulation, but higher maintenance
Check if the company offers options that suit your home’s style and your personal preference.
Glass Specifications
Inquire about the types of glass available. Good double glazing companies should offer:
- Low-emissivity (Low-E) glass for better insulation
- Argon or Krypton gas-filled units for improved thermal performance
- Toughened or laminated safety glass
- Soundproofing options if you live in a noisy area
A reputable company should explain the benefits of each type and help you choose the right fit.
Guarantees and Warranties
Reputable double glazing companies provide long-term warranties on both the product and the installation. A standard guarantee usually lasts around 10 years, covering issues like seal failure or discolouration. Make sure the warranty is provided in writing and clearly outlines what is and isn’t covered.
Also, ask if the company offers an insurance-backed guarantee. This provides peace of mind that your investment is protected even if the company ceases trading in the future.
Installation Process
In-House vs Subcontracted Installers
Some companies use in-house teams while others subcontract their installation. It’s generally better to work with double glazing companies that employ their own installers, as this offers more accountability. If subcontractors are used, verify that they’re qualified and experienced.
Site Survey and Custom Fitting
Every home is different. The best companies will perform a detailed site survey before installation to ensure a perfect fit. Ask if the quote includes a full site survey, and whether the measurements and fittings are custom-made to your specifications.
Pricing and Transparency
Avoid the Cheapest Option
While price is an important factor, the cheapest quote isn’t always the best deal. Low prices can mean cutting corners on material quality, installation, or aftercare. Instead, look for competitive pricing that offers value without compromising on quality.
Detailed Written Quote
Ask for a detailed quote that includes all costs—materials, labour, VAT, and potential extras. Make sure everything is clearly itemised. Watch out for vague pricing or high-pressure sales tactics that promise “limited-time offers” or “free upgrades.” A trustworthy company will allow you time to think before making a decision.
Energy Efficiency Ratings
Energy performance is one of the primary reasons people invest in double glazing. Make sure the company provides products with certified energy efficiency ratings. Look for the BFRC (British Fenestration Rating Council) label, which ranges from A++ (most efficient) to G (least efficient). Windows with higher ratings will help reduce your energy bills and carbon footprint.
Aftercare and Customer Support
Good customer service doesn’t stop once the windows are installed. Check whether the company offers aftercare support, such as maintenance tips, problem-solving guides, and fast responses to complaints or faults. It’s also worth checking how long it typically takes for the company to respond to service calls.
Local Presence and Showrooms
Choosing local double glazing companies often means better service and faster turnaround. Local companies are easier to contact, more familiar with building codes in your area, and may even be more invested in maintaining their reputation.
If possible, visit a showroom to inspect the quality of materials and workmanship firsthand. This also gives you an opportunity to ask questions and interact with the staff before committing.
Environmental Responsibility
Sustainable practices are becoming more important in every industry. Ask whether the company recycles old windows, uses eco-friendly materials, or sources products from sustainable suppliers. Companies that care about the environment are often more detail-oriented and committed to long-term performance.
Comparing Multiple Quotes
Never settle for the first quote. Collect at least three written quotes from different double glazing companies. This allows you to make a well-informed comparison not just on price, but also on quality, warranty, product options, and customer service.
Create a checklist or spreadsheet to track what each company offers and how they rank in the key categories mentioned above. This structured approach will make it easier to spot which offer provides the best overall value.
Conclusion
Finding the right company requires careful research, patience, and a willingness to ask questions. By focusing on reputation, certifications, product quality, warranties, installation practices, and overall transparency, you’ll be better prepared to choose a trustworthy provider. Remember that the best double glazing companies won’t pressure you into a quick sale—they’ll educate you, provide clear information, and offer ongoing support for years to come.
