Replacing a roof window on a flat or pitched roof may seem challenging, but the benefits are immense. Imagine more natural light, improved ventilation, and an increase in your home's value. Whether you’re a DIY enthusiast or prefer to hire a professional, with the right preparation and materials, you can transform your living space and create a stunning new view. In this guide, you'll discover step-by-step instructions, key considerations for different roof types, and how to make the best choices for your situation. Read on and be inspired to turn your roof window project into a bright success!
The Importance of Good Roof Windows
Roof windows play a crucial role in enhancing the living environment of your home. They bring in more natural light, positively impacting your mood and health. From attic rooms to living areas, extra daylight makes every space more inviting.
Roof windows also significantly improve your view, adding a new dimension to your attic and making the space more appealing. This can inspire creative ideas, like transforming it into a living or working area. Additionally, roof windows enhance ventilation, promoting better airflow and maintaining fresh air in your home.
The type of roof window varies based on whether you have a flat or pitched roof. Each type has specific models designed to optimize light and view, which plays a significant role in the aesthetics and functionality of your home. Installing roof windows can also increase your home's value—potential buyers appreciate the extra light and spacious feel they provide. Consider adding this smart feature to enhance both comfort and property value.
Types of Roof Windows
When choosing a roof window, there are several options depending on the roof type. For flat roofs, flat roof windows are designed to provide optimal daylight. For pitched roofs, popular options include pivot windows and top-hung windows, each offering unique benefits.
Roof Windows for Flat Roofs
Flat roof windows are specifically designed for flat or slightly sloped roofs (up to around a 15-degree angle). They maximize natural light, transforming spaces that would otherwise be dark into bright, pleasant living areas.
Types of Flat Roof Windows:
- Fixed Flat Roof Windows: These windows cannot be opened and are perfect for spaces where additional light is needed, but ventilation is less important, such as stairwells or hallways.
- Opening Flat Roof Windows: These windows can be opened manually or electrically for ventilation, making them suitable for living rooms, kitchens, and bathrooms where fresh air is important.
- Light Domes: These dome-shaped windows are made of materials like acrylic or polycarbonate. They are available in fixed or opening variants and can also serve as an emergency exit.
- Light Streets (Continuous Rooflights): A light street is a longer row of roof windows or a large glass panel that spans a significant portion of the roof. It is ideal for extensions or sunrooms to create a bright, airy atmosphere.
Materials and Insulation:
Flat roof windows typically feature high-quality insulation glass to minimize heat loss. The frames can be made of PVC, aluminum, or wood, depending on your preferences for maintenance and aesthetics.
Additional Features:
- Electric Operation: Makes opening and closing easier, especially for hard-to-reach windows.
- Rain and Wind Sensors: These automatically close the window in adverse weather conditions.
- Sun Protection and Blackout Blinds: Internal or external solutions to prevent overheating and ensure privacy.
Roof Windows for Pitched Roofs
For pitched roofs with a slope between 15 and 90 degrees, there is a wide variety of roof window options available.
Center-Pivot Roof Windows
These are the most popular choice for pitched roofs. They pivot around a central horizontal axis, usually in the middle of the window.
- Advantages:
- Easy Operation: Simple to open and close, even with furniture placed underneath.
- Good Ventilation: Can be left slightly open for continuous airflow.
- Suitable for Different Roof Slopes: Functions well on roof slopes from 15 to 90 degrees.
- Disadvantages:
- Limited View: The central hinge can obstruct the view.
Top-Hung Pivot Windows
This combination features both the pivot function and a top-hinged opening mechanism.
- Advantages:
- Unobstructed View: The top hinge allows the window to be fully opened outward.
- Maximal Light Inlet: A larger opening for more natural light.
- Flexible Use: Option to pivot or top-hung open as needed.
- Disadvantages:
- Higher Cost: Extra mechanisms make these more expensive compared to standard pivot windows.
Top-Hung Roof Windows
These windows are hinged at the top and open outward, allowing for an unobstructed window opening.
- Advantages:
- Panoramic View: Unobstructed view and optimal ventilation.
- Ideal for Low Roof Pitches: Suitable for roof slopes from 15 to 55 degrees.
- Disadvantages:
- Space Requirements: Requires sufficient space above the window for proper opening.
Balcony Roof Windows
Innovative solutions like the Velux Cabrio balcony window can transform your roof window into a small balcony.
- Advantages:
- Extra Outdoor Space: Creates a balcony feel without major renovations.
- Maximum Light Inlet: Large glass areas bring in abundant natural light.
- Disadvantages:
- Complex Installation: Requires professional installation and possibly a building permit.
- Higher Cost: Greater investment compared to standard roof windows.
Dormer Windows
Although technically not a roof window, a dormer creates additional space and light by extending the roof.
- Advantages:
- More Space: Provides additional usable floor space and headroom.
- Aesthetic Improvement: Can enhance the overall look of the home.
- Disadvantages:
- Cost and Permits: Expensive and almost always requires a building permit.
- Construction Time: Longer installation process.
Knee Wall Windows
These are installed under a standard roof window and extend to the floor.
- Advantages:
- Improved Light and View: Enhances natural light and sightlines, especially in rooms with knee walls.
- Disadvantages:
- Complex Installation: May require alterations to the interior wall and roof structure.
Materials for Roof Windows
Wooden Frames:
- Advantages: Natural aesthetic, good insulation.
- Disadvantages: Requires regular maintenance to prevent rot.
PVC (Plastic) Frames:
- Advantages: Low maintenance, moisture-resistant, cost-effective.
- Disadvantages: Less traditional appearance, limited color options.
Aluminum Frames:
- Advantages: Strong and durable, slim profile for maximum light.
- Disadvantages: Higher cost, less insulating compared to wood or PVC without thermal break.
Glass Options
- Single Glass: No longer recommended due to poor insulation.
- Double or HR++ Glass: Standard for good thermal insulation.
- Triple Glass: Provides maximum energy savings and comfort.
- Laminated Safety Glass: Prevents breakage and increases safety.
- Self-Cleaning Glass: Features a special coating that reduces dirt buildup.
- Solar Control Glass: Reduces heat gain from sunlight, ideal for south-facing roofs.
Accessories and Extras
- Blackout Blinds: For complete darkness, ideal for bedrooms.
- Insect Screens: Keep insects out while windows are open.
- Electric or Solar Operation: Easy remote control, especially useful for high windows.
- Rain Sensors: Automatic window closing during rain.
- Sun Shades and Roller Shutters: External solutions to regulate heat and light.
Three Popular Roof Window Brands in the Netherlands: Velux, Roto, and Fakro
Velux, Roto, and Fakro are leading roof window brands in the Netherlands. Each offers unique features and advantages for different types of roofs and building needs.
Velux Roof Windows
Velux is a globally recognized brand and a market leader in skylights and daylight solutions. Founded in 1941, Velux has decades of experience in providing high-quality products that optimize natural light and ventilation in homes.
Product Range
- Center-Pivot Skylights: These windows pivot on a central hinge point and are easy to operate, even if there are furnishings underneath. Ideal for placement at an accessible height.
- Top-Hung Roof Windows: Combines the convenience of a pivot window with the option to open the window from the top, providing an unobstructed view and extra ventilation.
- Flat Roof Skylights: Specially designed for flat roofs, available in both fixed and opening versions. They provide maximum daylight to spaces under a flat roof.
- Velux Cabrio® Balcony Window: An innovative system that turns a skylight into a small balcony within seconds, instantly extending your loft space with an outdoor area.
- Domes and Skylights: For larger daylight solutions on flat roofs, ideal for extensions and commercial applications.
Materials and Finish
- Wooden Frames: Made from high-quality pinewood, treated for durability and available with a clear or white finish.
- Polyurethane Frames: Low-maintenance and moisture-resistant, ideal for humid areas like bathrooms and kitchens.
Innovations and Technology
- Integra® System: Skylights powered by electricity or solar energy that can be remotely controlled via a wall switch or smartphone app. Equipped with rain sensors that automatically close the window when it rains.
- Active with Netatmo: A smart sensor system that automatically regulates the indoor climate by opening or closing windows based on temperature, humidity, and CO₂ levels.
- High-Insulation Glazing: Options such as HR++ and triple glazing for enhanced energy efficiency and sound insulation.
Roto Skylights
Roto is a German company founded in 1935, known for its innovative technologies and high-quality roof windows. They combine German reliability with advanced functionality and ergonomic design.
Product Range
- Designo R6 Center-Pivot Skylights: Modern design with concealed hinges and excellent insulation values. The handle is positioned at the bottom for easy access.
- Designo R8 Top-Hung/Center-Pivot Skylights: Offers both pivot and top-hung opening functions, allowing the window to fully open outward for panoramic views and optimal ventilation.
- RotoQ Roof Windows: An innovative series featuring a simple click installation system for quick and safe setup. Available in both wooden and plastic versions.
- Flat Roof Skylights: Available in fixed and opening versions, with options for electric operation and high-quality insulation.
Materials and Finish
- Plastic Frames: Low-maintenance and durable, ideal for high-humidity areas.
- Wooden Frames: Made from high-quality wood, treated for long life and available in various finishes.
Innovations and Technology
- Easy Installation: The RotoQ system provides acoustic feedback for correct installation, ensuring a hassle-free setup.
- Thermo-Block Technology: Includes extra insulation around the frame to minimize heat loss.
- Safety Glass: Equipped with laminated glass as standard for increased safety and burglary resistance.
Fakro Skylights
Fakro is an international company founded in 1991, which has grown to become the second-largest manufacturer of roof windows in the world. They are known for their focus on innovation, safety, and creating comfortable living spaces.
Product Range
- FTP-V Center-Pivot Roof Windows: Standard roof windows with a central hinge and bottom operation, providing easy use and flexible placement.
- PreSelect Top-Hung/Center-Pivot Roof Windows: A unique system offering both top-hung and pivot functions with a switch to toggle between modes.
- Flat Roof Skylights: Innovative designs such as the DXW walkable skylight, which is suitable for rooftop terraces.
- Light Tunnels: Designed to bring natural light to dark spaces where direct window installation is not possible.
- Rooftop Terrace Solutions: Roof windows that can be transformed into access points for a rooftop terrace or balcony, like the FGH-V balcony window.
Materials and Finish
- Wooden Frames: High-quality, vacuum-impregnated pine wood with multiple layers of lacquer for durability.
- Plastic Frames: Made of reinforced PVC, suitable for damp areas and easy to maintain.
Innovations and Technology
- TopSafe System: Reinforced construction that increases burglary resistance and ensures the durability of the roof window.
- Automatic Ventilation: Built-in ventilation systems like the V40P system provide constant airflow without energy loss.
- Energy-Saving Glass: Highly insulating glazing with options for triple glazing and special coatings to reduce heat loss.
Steps for Replacing a Roof Window
Preparation
Ensure you have the correct tools and materials ready, such as a spirit level for accuracy and screws for attachment. Measure the size of the existing window precisely to confirm that the new one will fit. Prepare primer for any woodwork if needed, and use filler to smooth any uneven areas in the wood for a neat finish.
Also, check the condition of the purlins and rafters. They need to be sturdy enough to support the weight of the roof window. Confirm that the flashing matches the new window, as this component prevents leaks.
Removing the Old Roof Window
Carefully dismantle the old window. Start by loosening the screws around the frame. If they are rusted, you might need different tools or extra force. Then, remove the flashing, ensuring no old sealant remains.
Be cautious to avoid damaging the surrounding roof when removing the old window. If you encounter any damage, use acrylic sealant for temporary repair. Make sure to remove any old sealant or filler so that the new window can be installed cleanly.
Installing the New Roof Window
Position the new roof window in place and temporarily secure it with a few screws. Use a spirit level to ensure the window is aligned properly. If the purlins are slightly out of line, adjust the positioning to prevent leaks.
Install the new flashing carefully, as it handles water drainage. It's important to seal it properly with filler and acrylic sealant. Finish installing the window by tightening all screws securely. Make sure everything is waterproof and well-insulated to prevent cold bridging and moisture issues.
Permits and Regulations
When installing a roof window, you must consider permits. Whether you need a permit depends on the position and type of roof window. For a roof window on the rear or side of a flat roof, you typically don't need a permit, unless it faces a public road. Rules vary by municipality, so it's wise to check with your local council for specific regulations. Some communities may have additional requirements or restrictions.
If you want to add a roof window to an existing building, confirm whether it's exempt from needing a building permit. The top of the roof window must be at least 0.5 meters below the roof ridge. Additionally, the roof window must comply with the requirements of the Building Decree 2012, which concerns safety, usability, and energy efficiency. This means the roof window should allow adequate natural light and contribute to proper ventilation. For more information, consult the regulations for roof windows.
Finishing and Interior of the Attic Space
Attic Interior Finish and Protection
When decorating an attic, it’s essential to focus on the interior finish, space protection, as well as shading and privacy options. These elements not only enhance the aesthetic but also contribute to comfort and safety.
Interior Finish and Protection
The interior of your attic can be finished with materials such as drywall or wooden panels, providing a neat, clean look. Insulation is crucial to make the attic more energy-efficient and comfortable, especially during extreme weather. Roof insulation options can help achieve optimal finishing and energy savings.
Special paints or coatings can be used for additional protection against moisture and temperature fluctuations, keeping the attic in good condition and extending the lifespan of the materials. Don’t forget that good ventilation is necessary to prevent moisture and mold formation.
Shading and Privacy Options
Shading is essential to keep your attic cool and comfortable. Consider roller blinds, venetian blinds, or blackout curtains, which help regulate light and provide privacy. Venetian blinds can easily adjust the light as needed.
Roof windows can also be fitted with special sun-resistant coatings to reduce heat, especially useful during the summer months. This prevents overheating and keeps the space comfortable. For safety, it's advisable to choose sturdy, durable shading materials.
Cost of Replacing a Roof Window
The cost of replacing a roof window can vary depending on several factors. Prices generally range between €800 and €2,000, with various elements influencing the total cost.
Factors Affecting Costs
- Type of Roof Window: The material you choose, such as wood or PVC, affects the price.
- Dimensions: Larger roof windows are usually more expensive.
- Additional Features: Adding features like shading or insulation will increase costs.
General Price Indications
Basic Roof Window Costs:
- PVC Roof Window (Standard Size 78x98 cm): €400 - €600
- Wooden Roof Window (Standard Size 78x98 cm): €500 - €700
- Flat Roof Window: €600 - €1,000
- Velux Roof Window (A-brand, Standard Size): €600 - €800
Installation Costs:
- Simple Replacement (same size, no structural changes): €300 - €500
- Complex Installation (structural modifications, larger size): €500 - €800
Additional Options:
- Interior Finish (drywall, trimming): €150 - €300
- Exterior Finish (flashing, waterproofing): €100 - €200
- Shading or Blackout Options: €100 - €250
- Electric Operation: €300 - €600
Total Cost Including Labor and VAT:
- Simple Replacement: €800 - €1,200
- Comprehensive Installation with Extras: €1,300 - €2,500
Frequently Asked Questions
Do I need a permit to replace my roof window?
In most cases, replacing an existing roof window is permit-free, especially if you keep the same size and appearance. If you want to install a larger window or change its position, you may need a building permit. It is advisable to check with your local municipality for specific regulations.
How long does it take to replace a roof window?
Replacing a roof window typically takes one day. An experienced installer can complete simple replacements in a few hours. More complex installations, such as enlarging the opening or modifying the roof structure, may take longer.
Can I replace my roof window myself, or should I hire a professional?
Although handy DIY enthusiasts may handle some simple replacements, it is generally recommended to hire a professional installer. This ensures correct installation, prevents leaks, and keeps warranties on materials and labor intact.
Which roof window brand should I choose for replacement?
Reliable brands in the Netherlands are Velux, Roto, and Fakro. These brands offer high-quality roof windows with good insulation, different operation options, and long warranties. Your choice depends on your specific needs, budget, and aesthetic preferences.
What is the lifespan of a new roof window?
A properly installed and maintained roof window lasts an average of 20 to 30 years. Wooden roof windows require more maintenance than PVC or aluminum versions. Regular inspection and maintenance will extend their lifespan and maintain functionality.
Can I replace my old roof window with a larger one?
Yes, it is possible to install a larger roof window, but this requires modifications to the roof structure, which increases labor costs and may require a building permit. It’s essential to have a professional installer assess and perform this job.
