Install Skylight or Velux-Type Roof Window
Installing Velux-type skylights or roof windows is a minor renovation that enhances natural lighting in your home, with budgets ranging from 800 € to 3,500 €. The price varies significantly based on the skylight size, materials selected, and installation complexity, from basic options at 450 € to premium systems with motorized blinds for 1,200 € or more. We recommend requesting detailed quotes from several professionals to compare options and ensure the best value for your investment. Remember that investing in proper sealing and installation prevents future water leak problems.
Service Levels and Prices
Compare the different options available according to your budget and needs.
Basic
Installation of a small to medium-sized Velux skylight on roofs with easy access and no structural complications.
Standard
Installation of medium to large-sized Velux roof window with structural reinforcement and superior quality finishes.
Premium
Complete installation of Velux system with multiple skylights, automation, and luxury finishes on complex projects.
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Velux Skylight or Roof Window Installation Prices
See what homeowners usually pay for the most common tasks. Use these ranges to fine-tune your scope and avoid missing key items in your budget.
Basic Velux roof window installation (60x90 cm) with frame and sealing
Medium-size Velux skylight installation (78x140 cm) with thermal insulation
Large Velux roof window installation (114x140 cm) with ventilation system
Velux skylight installation with motorized roller blind
Multiple installation (2 roof windows) with structural beam reinforcement
Existing structure adaptation and reinforcement + roof window installation
Steps to install a Velux skylight or roof window with Reformia
Get pricing information for installing a skylight or Velux-type roof window.
1. Assess the existing roof structure
Before installing the Velux skylight, it is essential to inspect the current condition of beams, trusses, and roof to detect any structural damage or weaknesses. If structural reinforcement is needed, costs may increase up to 950 € for prior adaptation and reinforcement. A correct assessment ensures a safe and durable installation.
2. Measure and mark the skylight location
Precise measurements are taken to determine the optimal location for the skylight, considering sun orientation and available interior space. Common sizes range from 60x90 cm (basic installation from 450 €) to 114x140 cm. Proper placement maximizes natural light and minimizes condensation issues.
3. Cut through the roof covering and structure
A precise cut is made in the roof covering and structure following the established marks, carefully removing roofing material and adapting beams if necessary. This step is critical to ensure watertightness. The work requires expertise to avoid damage to the roof's structural integrity.
Get pricing information for installing a skylight or Velux-type roof window.
What is usually included in a quote
Each professional may structure quotes differently, but most project budgets follow this logic.
Typically included
Often not included
Steps to install a Velux skylight or roof window
Get pricing information for installing a skylight or Velux-type roof window.
1. Assess the existing roof structure
Before installing the Velux skylight, it is essential to inspect the current condition of beams, trusses, and roof to detect any structural damage or weaknesses. If structural reinforcement is needed, costs may increase up to 950 € for prior adaptation and reinforcement. A correct assessment ensures a safe and durable installation.
2. Measure and mark the skylight location
Precise measurements are taken to determine the optimal location for the skylight, considering sun orientation and available interior space. Common sizes range from 60x90 cm (basic installation from 450 €) to 114x140 cm. Proper placement maximizes natural light and minimizes condensation issues.
3. Cut through the roof covering and structure
A precise cut is made in the roof covering and structure following the established marks, carefully removing roofing material and adapting beams if necessary. This step is critical to ensure watertightness. The work requires expertise to avoid damage to the roof's structural integrity.
4. Install the frame and sealing system
The Velux aluminum or PVC frame is positioned around the opening, carefully applying high-quality sealing systems to prevent water leaks. From 450 €, basic installation includes complete frame and sealing. Poor sealing is the most common cause of future leak problems.
What can change your final price
Even similar projects can end with different budgets. These are the factors that most often push costs up or down.
Skylight size and model
Velux skylights come in different standard dimensions (55x78cm, 78x98cm, 114x118cm, etc.) and models, which directly affects the price of materials and installation complexity.
Roof type and accessibility
Difficulty varies significantly depending on whether the roof is pitched, flat, or difficult to access, as well as the type of covering (tile, slate, metal sheet). More complex roofs require additional time and safety measures.
Complementary accessories
Final price varies depending on whether it includes elements such as motorization systems, roller blinds, blackout curtains, connection tube, or temperature regulators, which can double the total cost.
Structural reinforcement needs
Some roofs require reinforcing the existing structure with beams or additional elements before installation, which significantly increases the total project budget.
General Information
Get pricing information for installing a skylight or Velux-type roof window.
Installing a Velux skylight or roof window is an excellent solution to increase natural light in attics, living rooms, or bedrooms without sufficient windows. This type of ceiling window allows you to take advantage of direct sunlight, significantly improving interior lighting and creating more pleasant and healthy spaces.
General Information
Get pricing information for installing a skylight or Velux-type roof window.
The installation process involves making an opening in the roof covering, preparing the roof structure, installing the ceiling window frame, and ensuring proper waterproofing to prevent water leaks. It is important to work with specialized professionals who guarantee quality and lasting work.
The cost of installing a Velux skylight in Spain varies depending on the window size, roof complexity, type of materials used, and geographic location. Quotes can range from 800 € to 3,500 €, depending on whether it is a simple installation or one requiring additional structural reinforcement.
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Minor Works
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Renovations
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Technical Services
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Retail & Assembly
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Energy Suppliers
Aggregate range based on the published guides in this family, including project totals and unit pricing where relevant.
Construction
Aggregate range based on the published guides in this family, including project totals, hourly pricing, and unit pricing where relevant.
Installers
Aggregate range based on the published guides in this family, including project totals, hourly pricing, and unit pricing where relevant.
Maintenance
Aggregate range based on the published guides in this family, including project totals, hourly pricing, and unit pricing where relevant.
Moving Services
Aggregate range based on the published guides in this family, including project totals, hourly pricing, and unit pricing where relevant.
Minor Works
Aggregate range based on the published guides in this family, including project totals, hourly pricing, and unit pricing where relevant.
Renovations
Aggregate range based on the published guides in this family, including project totals, hourly pricing, and unit pricing where relevant.
Technical Services
Aggregate range based on the published guides in this family, including project totals, hourly pricing, and unit pricing where relevant.
Retail & Assembly
Aggregate range based on the published guides in this family.
Frequently Asked Questions
What is the average cost to install a Velux skylight in Spain?
The average cost ranges from 1,200 € to 2,000 € for a standard installation of a single medium-sized skylight. This price includes the window, waterproofing materials, labor, and warranty. Basic installations can cost from 800 €, while premium projects with multiple skylights and automation can exceed 3,500 €. The price varies depending on the autonomous community, roof complexity, and whether structural reinforcement is needed.
How long does skylight installation take?
A standard installation of a single Velux skylight usually takes 1 to 2 days, depending on roof accessibility and weather conditions. If the roof has structural complications or multiple skylights are installed, the time can extend to 3 to 5 days. Waterproofing and final finishes may require drying time, so it is recommended not to use the space for 24-48 hours after installation.
Is it necessary to reinforce the roof structure to install a skylight?
It depends on the existing structure and skylight size. On many roofs with well-dimensioned wooden or concrete beams, reinforcement is not necessary. However, on older roofs, made of weak materials, or if very large skylights are installed, it may be necessary to add reinforcing beams. A professional installer will evaluate the structure and note it in the quote. This additional reinforcement usually costs between 300 € and 800 € extra.
How do you prevent the skylight from leaking or letting water in?
Proper waterproofing is essential. Use quality Velux flashing, appropriate drainage systems, and professional silicone or polyurethane sealants. Make sure the roof slope is correct and that drainage gutters are installed properly. It is vital that the installer is Velux certified and experienced. A good leak guarantee (minimum 5 years) is an indicator of professionalism. Perform annual maintenance by cleaning the skylight and checking the seals.
What is the difference between a fixed skylight and an opening one?
A fixed skylight only allows natural light in and is more economical (from 600 €). An opening skylight allows ventilation and temperature control, costing from 1,200 €. Motorized models offer automation and remote control, being more expensive (1,800 € to 3,000 €). Motorized solar blinds add solar control and privacy. Choose according to your needs: if you only want light, a fixed one is sufficient; if you want ventilation and thermal control, opt for a tilting or motorized one.
Got more questions? Contact us!
Got more questions? Contact us!
Frequently Asked Questions
What is the average cost to install a Velux skylight in Spain?
The average cost ranges from 1,200 € to 2,000 € for a standard installation of a single medium-sized skylight. This price includes the window, waterproofing materials, labor, and warranty. Basic installations can cost from 800 €, while premium projects with multiple skylights and automation can exceed 3,500 €. The price varies depending on the autonomous community, roof complexity, and whether structural reinforcement is needed.
How long does skylight installation take?
A standard installation of a single Velux skylight usually takes 1 to 2 days, depending on roof accessibility and weather conditions. If the roof has structural complications or multiple skylights are installed, the time can extend to 3 to 5 days. Waterproofing and final finishes may require drying time, so it is recommended not to use the space for 24-48 hours after installation.
Is it necessary to reinforce the roof structure to install a skylight?
It depends on the existing structure and skylight size. On many roofs with well-dimensioned wooden or concrete beams, reinforcement is not necessary. However, on older roofs, made of weak materials, or if very large skylights are installed, it may be necessary to add reinforcing beams. A professional installer will evaluate the structure and note it in the quote. This additional reinforcement usually costs between 300 € and 800 € extra.
How do you prevent the skylight from leaking or letting water in?
Proper waterproofing is essential. Use quality Velux flashing, appropriate drainage systems, and professional silicone or polyurethane sealants. Make sure the roof slope is correct and that drainage gutters are installed properly. It is vital that the installer is Velux certified and experienced. A good leak guarantee (minimum 5 years) is an indicator of professionalism. Perform annual maintenance by cleaning the skylight and checking the seals.
What is the difference between a fixed skylight and an opening one?
A fixed skylight only allows natural light in and is more economical (from 600 €). An opening skylight allows ventilation and temperature control, costing from 1,200 €. Motorized models offer automation and remote control, being more expensive (1,800 € to 3,000 €). Motorized solar blinds add solar control and privacy. Choose according to your needs: if you only want light, a fixed one is sufficient; if you want ventilation and thermal control, opt for a tilting or motorized one.