Frequently Asked Questions About Windows & Doors.

How do I know when my windows need replacing?

There isn't a set age at which every window needs replacing. The condition and performance of your existing windows are more important.

Common signs that it may be time for replacement windows include:

• Draughts around the window frames
• Condensation or misting between the glass panes
• Windows becoming difficult to open, close or lock
• Damaged, warped or deteriorating frames
• Increased outside noise
• Rooms feeling colder than they used to
• Higher heating requirements
• Water getting in around the frame

If you're unsure whether your windows need replacing, DanJ Windows can inspect them and advise you on the most suitable option.

How much do replacement windows cost?

The cost of replacement windows depends on the size, style, material, glazing, colour and number of windows required.

For example, a standard uPVC window will normally cost less than a large bay window or a window with more complex glazing and design requirements.

The best way to get an accurate price is to arrange a quote based on your individual property rather than relying on an online average.

DanJ Windows provides free, no-obligation quotes for window and door replacement across South Wales.

Should I choose uPVC, aluminium or another type of window?

The right choice depends on your property, budget and the look you want to achieve.

uPVC windows are a popular choice because they are low-maintenance, energy efficient and available in a wide range of colours and styles.

Aluminium windows offer slim frames and a contemporary appearance and can be particularly effective for larger areas of glazing.

Other options may be suitable depending on your property and requirements.

Dan can talk you through the different options and help you choose a window that works with both your home and your budget.

Will new windows make my home warmer and more energy efficient?

Modern replacement windows can improve the thermal performance of your home, particularly when replacing older, draughty or poorly performing windows.

Energy-efficient glazing, modern frames and a professional installation can help reduce heat loss and draughts, making rooms feel more comfortable.

However, windows are only one part of a home's overall energy efficiency. The improvement you experience will depend on your existing windows, insulation, heating and the property itself.

DanJ Windows can advise on suitable energy-efficient window options for your home.

How long does it take to fit new windows and doors?

This depends on the number and type of windows or doors being replaced and whether any additional work is required.

A straightforward individual window or door replacement can often be completed within a day, while replacing windows throughout an entire property will take longer.

Before work begins, Dan will explain what is involved and give you a realistic idea of how long the installation should take.

The aim is always to complete the work carefully and efficiently while keeping disruption to your home to a minimum.

Do I need planning permission to replace my windows or doors?

In many homes, replacing existing windows or doors on a like-for-like basis will not require planning permission.

However, different requirements can apply to listed buildings, properties in conservation areas or projects that significantly alter the appearance or structure of a property.

Building Regulations may also apply to replacement windows and doors.

If you're unsure, it is always worth checking the requirements for your property with your local authority before work starts.

What is FENSA and do I need a certificate for replacement windows?

FENSA is a government-authorised Competent Person Scheme that monitors Building Regulations compliance for qualifying replacement window and door installations in England and Wales.

Replacement windows and doors must meet the relevant Building Regulations. Depending on the installer and type of work, compliance can be handled through an appropriate Competent Person Scheme or through Local Authority Building Control.

It is important to establish how your installation will be certified before work begins, particularly because evidence of Building Regulations compliance may be requested when you sell your home.

DanJ Windows can explain what applies to your particular installation when providing your quote.

Why do new windows have trickle vents?

Trickle vents provide background ventilation even when your windows are closed.

Modern windows are generally much more airtight than older windows. While that's good for reducing draughts and heat loss, homes still need appropriate ventilation to help maintain indoor air quality and manage excess moisture.

Current Building Regulations mean background ventilation is required in many replacement window installations.

The exact requirements depend on the property and its existing ventilation, so this should be considered as part of the installation rather than simply removing vents for appearance.

What should I look for when choosing a window and door fitter?

Price is important, but it shouldn't be the only consideration.

Before choosing a window fitter, look at:

• Previous installations and customer reviews
• Experience and quality of workmanship
• Whether you receive a clear written quote
• What products and specifications are included
• How Building Regulations compliance will be handled
• Guarantees or warranties offered
• Whether removal of your old windows or doors is included
• Who will actually be carrying out the installation

Using a local window fitter also gives you a direct point of contact rather than dealing with different salespeople, surveyors and fitting teams.

With DanJ Windows, you'll deal directly with Dan from the initial conversation through to installation.

Which areas does DanJ Windows cover?

DanJ Windows provides window and door fitting services throughout South Wales, including Cardiff, Caerphilly and surrounding areas.

Whether you're looking to replace one window, upgrade your front door or replace multiple windows and doors throughout your home, get in touch to discuss your project.