Everything you Need to Know About Installing a Skylight on a Flat Roof
In Summary
Installing a skylight on a flat roof is a complex operation that requires specialized expertise. The process unfolds in several steps, which include marking, precise cutting, the installation of the frame and the skylight, the application of a sealer and peripheral insulation, not to mention the finishing work and condensation control that must be carried out.
How to Install a Skylight on a Flat Roof
Installing a skylight on a flat roof involves several steps and offers benefits in terms of natural light and energy consumption, while also adding character to your property.
Before detailing how to install a skylight, let us pause briefly to examine the primary benefits of this addition to your flat roof.
Why Install a Skylight on a Flat Roof
There are several benefits to installing a skylight, in addition to being one of the renovations that increases the value of your property. Adding this component to your flat roof will not go unnoticed, and occupants will enjoy its numerous advantages.
Bring More Natural Light Into Your Space
When examining recent trends in property renovations with flat roofs, the installation of skylights frequently appears, primarily to enhance interior brightness. Moreover, the warm ambience promised by the skylight allows you to benefit from a healthy dose of vitamin D every day.
Reduce Electricity Consumption and Improve Comfort
While the skylight adds brightness to your living space, it also promotes better air circulation and enhances overall comfort. As you take greater advantage of natural light, this can also help lower your electricity bill.
Add Style and Value to your Property
One of the main criteria when selecting a new property is undoubtedly the presence of abundant natural light. Buyers favour homes that make the most of daylight. A skylight on a flat roof is an excellent way to add charm, style, and value to your property.
Types of Skylights Suited for Flat Roofs
There are various types of skylights that should be mentioned for an informed choice. Additionally, the size of the room, ceiling height, and the style of your property will affect your final decision.
Fixed Windows for Flat Roofs
Firstly, fixed windows provide an excellent source of light and a view to the outside. They are generally used for very high and hard-to-access ceilings and tend to be less expensive than other types of skylights.
Operable Windows, Electric or Manual
Operable windows, whether electric or manual, are a good choice, as they maximize both natural light and ventilation. Furthermore, they can help reduce your electricity consumption by aiding in temperature regulation.
Tubular Models and Contemporary Designs
Tubular models are often used in dark areas of your property or in spaces without windows, such as hallways or bathrooms. These windows are equipped with a reflective tube that directs sunlight into the room. Moreover, the tubes come in various sizes and can easily fit between beams and ceiling joints. In addition to these models, there are also more contemporary designs, such as dome or pyramid windows. Consult a professional who can answer all your questions.
Recommended Materials and Glass for Flat Roofs
The experts at Clinique de la toiture FCA guide you in choosing the appropriate materials and type of glass for flat roofs. For skylights on flat roofs, it is recommended to prioritize double or triple pane glass for optimal thermal insulation. Tempered laminated glass is a standard safety choice that resists impacts and is designed not to shatter. Finally, acrylic is lightweight and highly durable, just like polycarbonate, which is also available in double or triple pane glass.
How to Prepare for the Installation of a Skylight
If you wish to fully enjoy your skylight without compromising the waterproofing of your flat roof, entrust its installation to a team of experienced professionals.
Evaluate the Roof Structure and Choose the Right Location
Right from the start, the on-site expert will assess whether the structure of your flat roof can accommodate a skylight. Not only will they evaluate the structure, but they will also provide recommendations on the ideal placement based on the room’s needs and size. The expert will also recommend avoiding lower areas where water might accumulate.
Check the Waterproofing and Minimum Slope of the Flat Roof
Professional expertise is required when it comes to verifying the waterproofing and the minimum slope of a flat roof for accommodating a skylight. Therefore, it is important to entrust this task to a company with extensive experience in installing flat roof windows and skylights.
Choose the Right Dimensions and Type of Skylight
As mentioned, there are several types of skylights. Not only must you select the one that best meets your needs, but its dimensions are also important. The professional in charge will assist you in making the most appropriate choice using the recommended dimensions.
Key Steps to Install a Skylight on a Flat Roof
Several steps must be followed to install a skylight correctly.
1. Marking and Cutting the Opening
It is important to first mark the location of the skylight before precisely cutting the opening. This step is crucial for the remainder of the installation process. Experts at Clinique de la toiture FCA know their trade and take the necessary precautions throughout the operation.
2. Installation of the Frame and the Skylight
A precise cut will then allow for the insertion of the skylight’s frame. Our experts have developed techniques that ensure the secure installation of the frame while preserving the structure of the flat roof intact.
3. Application of the Sealer and Peripheral Insulation
Although the installation of the skylight frame requires great precision, the work is not finished. It is essential to emphasize the importance of preventing water infiltration. To do so, our on-site experts will install a waterproof membrane around the frame of the skylight, along with a high-quality sealer to block any form of possible infiltration.
4. Interior Finishing and Condensation Control
Finally, the interior finishing adds significant value to your new skylight. A condensation check will also be performed to ensure the quality of the professional installation.
Mistakes to Avoid When Installing a Skylight
Installing a skylight remains a complex and delicate operation. Here are the most common mistakes to avoid.
Neglecting Insulation and Condensation Management
From the outset, it is essential to insulate between the ceiling and the flat roof before proceeding with the installation of a skylight. This will help you avoid unexpected issues, such as water infiltration or excessive condensation. Moreover, it is important to choose a high-quality waterproofing membrane that will be installed between the junction of the flat roof and the skylight’s frame.
Choosing a Low-Quality Product
If you want to fully enjoy your skylight, it is highly recommended to choose a quality product. This will help you avoid water infiltration, overheating in summer, heat loss in winter, and more. It is therefore important to select a skylight with well-insulated glass.
Installing Without Professional Assistance
Considering everything mentioned, the installation of a skylight should not be left to amateurs. It is better to rely on experts who thoroughly understand their craft. This will help you avoid unexpected issues and potentially more costly interventions.
Skylight on a Flat Roof: Maintenance and Durability
If you want your skylight on a flat roof to last, be sure to benefit from regular maintenance.
Annual Inspection and Cleaning of the Glass
An annual inspection will detect any signs of wear, and on-site professionals will take the opportunity to clean the glass and the surrounding area of the skylight to prevent debris build-up.
Check the Sealer and the Waterproofing Seals
Verifying the sealer and the waterproof seals will help preserve your skylight for a long time and maintain the installed membrane in good condition.
Prevent Condensation and Water Infiltration
The annual inspection will also revisit any early signs of water infiltration and proceed with prompt repairs to help avoid more significant damage. Moreover, a condensation check will ensure that your skylight is still operating at its full efficiency.
What is the Price for Installing a Skylight on a Flat Roof?
Several factors come into play when choosing and installing a skylight.
Average Price Based on Window Type and Materials
The price of the skylight itself varies according to the quality of the product and its size, generally ranging between $500 and $3,000. Additionally, the cost of installing a skylight can vary from $2,000 to $6,000, depending on the complexity of the project, which fits perfectly within the average cost for a roof in 2025.
Factors Influencing the Total Cost
In short, the complexity of the project, the type of skylight, and the materials used will affect the overall bill.
Possible Financial Assistance or Credits for Renovations
Since a skylight project can represent a significant expense, you should know that there are renovation grants available in 2025 for roof refurbishment work.
Why Trust Us with Your Skylight Installation?
The professionals Clinique de la toiture FCA have all the necessary expertise to install your skylight. For decades, they have excelled in their field and are committed to quality workmanship. Benefit from expert advice and a team attentive to your needs. Speak with our experts today!
Don't wait any longer: ask us for a quote!
Get an estimate in just 2 quick steps!
*Please allow a minimum of 24 hours for your request to be processed. Thank you for your understanding!
Testimonials and reviews from our customers
Need help?
Leave us your email address and we will contact you as soon as possible to assess your needs!
Put an end to your water infiltration your clogged drains your roof problems
Leave us your email address and we will contact you as soon as possible to assess your needs!