How to Choose the Right Roof Window for Your Home

Choosing the right roof window can completely transform a room. Whether you’re converting a loft, upgrading an extension, or adding light to a dark space, the right model will improve natural daylight, ventilation and energy efficiency.

But not all roof windows are the same. From roof pitch to glazing performance, here’s what UK homeowners and installers need to consider.

1. Start With Your Roof Pitch

The first step in choosing a roof window is understanding your roof pitch (the angle of your roof).

Most roof windows are suitable for pitches between 10° and 90°, but this varies by model. Installing the wrong window for your pitch can affect drainage and performance.

If you’re unsure:

• Ask your builder
• Check architectural drawings
• Measure using a digital angle finder

Getting this right ensures long-term weather protection – especially important with the UK climate.

2. Pitched or Flat Roof Window?

Your roof type determines your window style.

Pitched Roof Windows

For pitched roofs, centre pivot roof windows are among the most popular options in the UK. They are:

• Easy to operate
• Ideal for loft conversions
• Suitable for most standard roof pitches

Flat Roof Windows

For flat roofs, domed or flat glass roof windows are typically used. These are common in:

• Extensions
• Garden rooms
• Kitchens with flat roof sections

Choosing the correct style ensures optimal light and performance.

3. Manual or Electric Roof Window?

Operation type is another important consideration.

Manual Roof Windows

• Cost-effective
• Simple operation
• Ideal for easy-to-reach installations

Electric Roof Windows

Perfect for higher ceilings or hard-to-reach spaces. Many electric models include rain sensors that automatically close the window when it detects rainfall, a practical feature for UK homes.

Electric roof windows are increasingly popular in modern loft conversions and smart home projects.

4. Choosing the Right Glazing for your Roof Window

Glazing significantly impacts thermal efficiency, security and noise reduction.

Manufacturers such as FAKRO offer a range of glazing options designed for different needs:

• P2 – Double glazed with toughened outer pane
• P5 – Triple glazed, anti-burglary
• U6 – Triple glazed, high energy efficiency
• U8 – Quadruple glazed, Passivhaus certified

With rising UK energy costs, triple glazing is becoming a popular upgrade for improved insulation.

5. Selecting the Right Internal Finish

The internal finish affects both appearance and durability.

Standard options typically include:

• Natural Pine
• White Acrylic
• White Polyurethane
• White UPVC

For bathrooms or kitchens, polyurethane and UPVC finishes are ideal as they resist moisture and condensation. For bedrooms and living spaces, pine or white acrylic remain popular choices.

6. How Much Light Do You Need?

A general recommendation:

The glass area should equal 15–20% of the room’s floor area for maximum daylight impact.

This is particularly important in loft conversions where natural light dramatically improves usability and comfort.

Do You Live in a Conservation Area?

If your home is in a conservation area, you may need a conservation-style roof window to meet planning requirements.

Always check with:

• Your architect
• Your builder
• Your local planning authority

Installing the correct specification from the outset prevents costly planning issues.

Final Thoughts

Choosing the right roof window involves more than selecting a size. You must consider:

• Roof pitch
• Roof type
• Glazing performance
• Finish
• Operation type
• Planning restrictions

Get these right, and your roof window will provide decades of natural light, ventilation and energy efficiency.

Explore our range of FAKRO roof windows and centre pivot windows and find the perfect solution for your home. If you have any questions about our products, our friendly advisors will be here to help you. You can chat with a BPF Online product advisor through our website, or call us on 01295 678614.

Learn More About Roof Windows:

• How to Choose the Right Roof Window Flashing Kit