Are you thinking of installing new windows or doors for your newly built home, or trying to replace the old ones with new, more functional solutions?  

Replacing windows or doors is a big decision. It affects your home’s comfort, security, and energy bills. Before you agree to anything, it’s worth asking the right questions. A good installer will welcome them. A poor one may not. 

In this blog, we will be covering the 10 most essential questions to ask before installing new windows and doors, before making the big commitment.  

So let’s dive in!  

Do you want to upgrade your windows without compromising on safety or aesthetics? At Bowalker, we offer high-quality windows & doors to keep your home safe.

1. Are the products compliant with UK Building Regulations? 

Meeting UK Building Regulations is a complete non-negotiable when you decide to install a new door or window. This includes safety, ventilation, and thermal performance. You must ask if the products are compliant/can be compliant with UK Building Regulations. Ensure the installer can self-certify the work and provide proper documentation upon completion of the job. 

2. What energy ratings and U-values do they offer? 

Energy efficiency matters more than ever. Ask for clear U-values, not vague promises. Lower numbers mean better insulation. This helps keep your home warmer in winter and cooler in summer, while reducing energy bills. 

3. Are the windows and doors PAS 24 security tested? 

Security should never be an afterthought. PAS 24 testing confirms that products meet UK standards for resistance against forced entry. This is especially important for ground-floor windows and entrance doors. Installers often have products that are PAS 24 certified or can be certified by applying for the certificate.  

4. What materials are best for my property type? 

Not every material suits every home. Timber often works well for period properties. Aluminium suits modern designs. uPVC offers value and low maintenance. A good installer should explain the pros and cons, not push one option. Ask for a detailed breakdown of each material with all its pros and cons.  

5. How will ventilation and drainage be handled? 

Modern homes still need to breathe. Ask how trickle vents, airflow, and drainage will be managed. Poor ventilation can lead to condensation and damp problems later on. Make sure to ask for condensation prevention tips and how likely airflow can be blocked based on your property location and construction.  

 Also Read – Door Installation in 6 Simple Steps

6. Who carries out the installation, and how is quality controlled? 

Find out whether the work is done by trained installers or subcontractors. Proper fitting is just as important as the product itself. Ask how installations are checked and signed off. Also, you can ask for the previous installation projects in similar properties using similar doors and windows as you’re planning to install.  

7. What warranties cover products and workmanship? 

You should receive clear warranties for both the windows and doors and the installation. Ask how long they last and what they cover. How to approach the installer/vendor to avail the warranty benefits? What are the terms and conditions you should know, etc.? This protects you if something goes wrong in the future. 

8. Will the installation require planning permission? 

Most replacements don’t need planning permission. However, listed buildings or homes in conservation areas often do. A knowledgeable installer should guide about the permission or any other legal requirements before work begins. 

9. What aftercare and maintenance support is provided? 

Problems don’t always appear straight away. You may experience problems from a week or a month after installation. Ask who to contact if adjustments or repairs are needed. What’s the duration covered for maintenance? Good aftercare is a sign of a company that stands by its work.  

10. What is the expected lead time and installation schedule? 

Ask how long it will take from order to installation and how many days the work will last. Ask for any specific steps/preparations you need to do during the installation period. Clear timelines help you plan and avoid long delays or unfinished work. This will also ensure you stay on budget and the home is ready to move in as per your planned timeline.  

Are your new windows being installed by qualified UK professionals? Learn why choosing the right window installation company in the UK matters.

Wrapping Up 

Not having enough information can come in the way of the best quality windows or doors installation. Asking the right questions helps avoid mistakes and costly issues later on.  

A professional installer like Bowalker will give clear answers and honest advice. Take your time, compare options, and choose a company that puts quality first. 

At Bowalker, we also offer a Free Home Consultation that helps homeowners with any questions they might have regarding installing new windows or doors.  

So got so many questions before you make a decision? Book your Free Home Consultation today!