What Size Roof Light Do I Need For My Home?💡

Published: 12th January 2023

When bringing natural light into your home, roof lights are an excellent solution. They can brighten up even the darkest corners of your living space and create an inviting and airy atmosphere. However, choosing the right size for your roof light is crucial to ensure optimal lighting and functionality.

In this blog, we’ll guide you through the process of selecting the perfect size for your flat roof light.

How To Choose The Right-Sized Roof Light

Selecting the correct size for your roof light involves a balance between aesthetic appeal, functionality, location, how much light you want in and structural considerations.

Here’s a step-by-step guide to help you make an informed decision:

  1. Asses The Room Dimensions

The first step in determining the appropriate size of your roof light is to evaluate the dimensions of the room it will illuminate. Consider the height of the walls, the width of the room, and the overall layout. South-facing rooms that invite more sun throughout the day may require larger roof lights to distribute light evenly, while north-facing rooms could benefit from more compact options since they will only get it near the end of the day.

  1. Determine The Purpose

Think about the purpose of the room. Is it a living space, a kitchen, a bathroom, a loft conversion or a bedroom? The function of the room plays a significant role in determining the ideal skylight size. For instance, a kitchen might need more intense lighting compared to a bedroom.

  1. Consider Natural Light Intensity

Take into account the direction your home faces and the amount of natural light it receives throughout the day. If your room is north-facing and doesn’t receive much sunlight, a larger roof window could help compensate for the lack of natural illumination.

  1. Think About Aesthetics

Roof lights can be stunning architectural features that enhance the overall look of your home. Consider the design and style you’re aiming for. A larger, statement roof light could create a dramatic focal point, while multiple smaller roof lights might create a more subtle and even distribution of light.

  1. Keep Proportions In Mind

Maintaining proportionality is essential for achieving a harmonious appearance. A roof light that’s too small for a large room might look out of place, while an excessively large window roof light in a small room could overwhelm the space.

What You Need To Consider When Picking The Size Of Your Roof Light


  1. Roof Angle And Pitch

The angle and pitch of your existing roof plane are crucial factors in determining the size of your roof light. Steeper roofs might accommodate taller and narrower roof lights, while flatter roofs could accommodate wider options.

  1. Glazing Area

The glazing area refers to the actual glass surface of the flat rooflight. A larger glazing area allows more warm light to enter, but finding a balance is essential. Too much glazing might result in excessive heat gain during summer or heat loss during winter, impacting your home’s energy efficiency.

  1. Building Regulations And Planning Permissions

Before finalising your decision, check local building regulations and planning permissions. Some areas might have restrictions on the size and placement of roof windows, especially in conservation areas or listed buildings.

  1. Energy Efficiency

Opting for a larger roof light might increase your home’s energy consumption for heating and cooling. To counter this, consider using energy-efficient glazing and shading solutions to regulate indoor temperature and minimise energy loss.

  1. Maintenance

Remember that larger roof lights might be more challenging to clean and maintain. If the roof light is too high up and out of easy reach, you might need to consider access and cleaning mechanisms.

Enlightened Choices For a Brighter Home

Selecting the right size skylight involves considering various factors, ranging from the room’s dimensions and purpose to your home’s orientation and architectural style. Striking a balance between aesthetics, functionality, and energy efficiency is essential to ensure your roof light enhances your living space while providing optimal illumination.

If you find yourself in need of an installer or require expert guidance in selecting the perfect roof light size for your home, you’re not alone in this journey. At Ofset, we’re dedicated to helping you from start to finish, ensuring that your vision of a brighter, more inviting sanctuary becomes a reality.

Contact us today, and let us guide you toward making an enlightened choice for a brighter home.