Choosing new windows and doors is a significant investment in your home. From improving energy efficiency to updating your property’s appearance, the right installation can make a real difference to how your home looks and feels.
However, with so many companies offering window and door installations, knowing who to trust can sometimes feel like a challenge.
A good product is important, but the company installing it matters just as much. You want to feel confident that the work will be completed properly, that your home will be treated with care and that someone will be there to help if you need support afterwards.
Before committing to a company, here are seven things worth checking.
1. Check their experience and background
One of the first things to look at is how long the company has been operating and what experience it has within the industry.
An established installer should be able to demonstrate its experience through previous projects, customer feedback and a clear understanding of the products and services it offers.
Look at the company’s website and social media pages. Do they regularly share completed installations? Can you see examples of work similar to what you have planned?
It’s also worth finding out whether the business has a physical showroom where you can view products and speak to the team.
2. Look at customer reviews and testimonials
Customer reviews can give you a useful insight into what it’s actually like to work with an installation company.
Rather than focusing entirely on the overall star rating, take some time to read what previous customers have said.
Look for comments about:
- The quality of the finished installation.
- Communication throughout the project.
- Whether the team arrived when expected.
- How the company treated the customer’s home.
- The support provided after the work was completed.
It’s particularly useful to look at reviews across different platforms, including Google and relevant industry review schemes.
Pay attention to how a company responds to feedback, too. A professional business should be willing to address customer concerns.
3. Find out who will actually carry out the installation
This is an important question that homeowners sometimes forget to ask.
Some companies use their own directly employed installation teams, while others rely on subcontractors to complete the work.
Neither arrangement automatically guarantees a better result, but you should understand who will be working in your home and who is responsible for overseeing the installation.
Ask the company:
- Are your installers directly employed?
- Who supervises the work?
- Who should I contact if I have a question during installation?
- Who is responsible if something needs putting right?
Knowing the installation process and who is responsible can give you greater confidence before the project begins.
4. Check registrations, certifications and insurance
Before choosing an installer, check what relevant industry registrations and certifications the company holds.
For example, Certass is a UK competent person scheme for certain replacement glazing installations. Registered installers can self-certify qualifying work within the scope of their registration, avoiding the need for a separate building control application for that work.
You can check a company’s registration through the relevant scheme.
Also ask about public liability insurance and any other relevant insurance arrangements.
Don’t be afraid to ask for clarification if you’re unsure what a particular certification covers. A reputable installer should be happy to explain.
5. Make sure your quotation is clear
When comparing quotes, it’s important to understand exactly what you’re paying for.
A lower price might initially look attractive, but make sure you’re comparing like for like.
Your quotation should clearly explain:
- The products and specifications being supplied.
- The number and sizes of windows or doors.
- The installation work included.
- Any additional building or finishing work.
- The payment arrangements.
- Any exclusions or potential additional charges.
If something isn’t clear, ask before agreeing to the work.
A professional company should be able to explain its quotation and help you understand the options available.
6. Ask about guarantees and aftercare
Your relationship with an installer shouldn’t end as soon as the installation is complete.
Before choosing a company, find out what guarantees are provided for the products and installation work.
Ask how long the guarantees last, what they cover and who you should contact if you experience a problem.
It’s also worth checking whether the company offers aftercare and maintenance advice.
For example, you might need guidance on adjusting door hardware, looking after window seals or understanding how to maintain your new installation.
Knowing that support is available after the work is finished can make the whole process feel more reassuring.
7. Choose a company that takes the time to understand your needs
Finally, pay attention to the experience you have when speaking to the company.
Are they listening to what you want to achieve? Do they explain the different products available? Are they happy to answer questions without making you feel pressured?
Every home is different, and the right solution will depend on your property, budget and personal preferences.
A good installer should take the time to understand your requirements and recommend suitable options rather than simply pushing the same product to every customer.
Why choosing the right installer matters
New windows and doors are an investment you want to enjoy for years to come.
Taking a little extra time to research installation companies, compare quotations and ask the right questions can help you make a more confident decision.
At Narborough Windows & Conservatories, we’ve been helping homeowners improve their properties since 1999.
As a family-run business, we take pride in offering a personal service, quality products and installations carried out by our own directly employed team. We also have an in-house building team for projects that require additional work.
From your initial consultation through to installation and aftercare, we’re here to help you understand your options and find the right solution for your home.
Looking for a trusted local window and door installer?
Get in touch with Narborough Windows & Conservatories to discuss your next home improvement project.
Visit www.narboroughwindowsconservatories.co.uk to explore our products and services.



