Homeowner’s Guide to Skylight Installation

October 24, 2024

From enhancing natural light to cutting down energy costs, skylights offer a range of practical and aesthetic benefits. In fact, studies show that homes equipped with skylights can reduce their energy consumption by up to 30%, thanks to the additional light and warmth provided during the day.

Natural light has also been linked to improvements in mood and productivity, making skylights an excellent choice for home offices or living spaces. But before you jump into installation, it’s essential to know the types of skylights available, how to select the right one for your needs, and what the installation process entails. 

Table of Contents

Types of Skylights

Skylights come in a variety of types, each designed to meet specific needs, whether it’s for natural light, ventilation, or energy efficiency. Understanding these options will help you choose the one that fits your home best.

Fixed Skylights

Fixed skylights are the most common type and, as the name suggests, are non-operable. Their primary function is to allow natural light into your home without providing ventilation. These skylights are typically installed in areas that don’t require air circulation but can benefit greatly from an influx of sunlight.

Benefits:

  • Maximizes the amount of natural light in a room.
  • Provides energy savings by reducing the need for artificial lighting during the day.
  • Its sealed design prevents moisture build-up, making it ideal for humid environments like bathrooms or kitchens.

Ideal Locations:

  • Living rooms, where natural light can elevate the atmosphere without the need for ventilation.
  • Hallways and stairwells, where windows are limited but light is needed to illuminate the space.
  • Bathrooms, where natural light can be maximized while preventing moisture-related issues.

Ventilated Skylights

Ventilated skylights, also known as venting skylights, provide both light and airflow. These skylights can be opened manually or electronically, making them a great choice for rooms where ventilation is needed, such as kitchens and bathrooms. Some models even come with rain sensors, which close the skylight automatically when it detects precipitation.

Benefits:

  • Reduces humidity in kitchens and bathrooms, helping to prevent mold and mildew.
  • Enhances indoor air quality by allowing fresh air to circulate through your home.
  • Can help cool your home naturally by releasing warm air, reducing the need for air conditioning.

Best Areas for Installation:

  • Kitchens, where cooking can create heat and humidity that needs to be vented.
  • Bathrooms, where moisture buildup can lead to mold or mildew if not properly ventilated.
  • Bedrooms, where additional airflow can create a more comfortable sleeping environment.

Tubular Skylights

Tubular skylights are smaller, more compact skylights that are perfect for bringing natural light into tight spaces where larger skylights won’t fit. These skylights use a reflective tube to direct sunlight from the roof into small rooms or corridors, making them ideal for hallways, closets, or bathrooms.

Benefits:

  • Energy-efficient, as they use minimal roof space and provide natural light to areas where traditional skylights wouldn’t fit.
  • Easy to install compared to other skylight types because of their small size and flexibility.
  • Perfect for spaces with limited roof access, like narrow hallways or small bathrooms.

Best Locations:

  • Hallways, which often lack natural light.
  • Closets, where a little natural light can make a big difference.
  • Bathrooms, where space is limited but light is still essential.

Choosing the Right Skylight for Your Home

When selecting the perfect skylight for your home, there are several factors to consider, including material, size, placement, and energy efficiency. The right skylight can make a world of difference in both aesthetics and function, but choosing the wrong one could lead to issues like overheating, leaks, or inefficiency.

Material Considerations

Skylights are available in a range of materials, each with its own set of pros and cons. The most common materials include glass and acrylic, both of which have their unique benefits.

  • Glass Skylights: Glass skylights are generally more durable and resistant to scratches. They offer excellent insulation, especially when double- or triple-glazed, making them ideal for colder climates where heat retention is important. Glass skylights also tend to provide clearer views and are less likely to yellow over time compared to acrylic options.
  • Acrylic or Polycarbonate Skylights: Acrylic skylights are lightweight and cost-effective, making them a popular choice for budget-conscious homeowners. They are less durable than glass and more prone to scratching, but they offer flexibility in design and are less likely to shatter on impact.

Size and Placement

The size and placement of your skylight will significantly impact its effectiveness. A skylight that is too small may not provide enough light, while one that is too large can lead to overheating or excessive brightness, particularly in sunny climates.

  • Size Considerations: Ideally, the skylight’s surface area should be between 5% to 15% of the room’s floor area, depending on the room’s lighting needs and the orientation of the skylight. For smaller rooms like bathrooms, a tubular skylight may suffice, whereas larger spaces like living rooms may benefit from bigger, fixed skylights.
  • Placement: Skylights should be placed strategically to maximize natural light without creating glare or overheating. South-facing skylights will provide the most sunlight but may require UV protection to prevent excessive heat during the summer months. North-facing skylights, on the other hand, offer more consistent but softer light.

Climate and Energy Efficiency

The climate you live in should heavily influence your choice of skylight. In hot climates, skylights with UV-blocking coatings or ventilated options can help reduce heat gain, while in colder areas, energy-efficient models that prevent heat loss are crucial.

  • Low-E Glass: Skylights with Low-E (low emissivity) coatings are designed to reflect heat while allowing light to pass through, making them a great option for both warm and cold climates. These coatings help reduce energy costs by keeping homes cooler in the summer and warmer in the winter.
  • Double or Triple Glazing: In colder climates, opt for skylights with double or triple glazing to provide better insulation and prevent heat from escaping during winter.

Energy-Efficient Certifications

When selecting a skylight, it’s worth looking for models that come with energy-efficient certifications, such as ENERGY STAR ratings. ENERGY STAR-rated skylights meet strict energy-efficiency guidelines and can help you save on heating and cooling costs, as well as qualify for potential rebates or tax credits in certain areas.

Installation Process Overview

Skylight installation is a complex process that involves careful planning and execution to avoid issues like leaks, drafts, or structural damage. Whether you’re installing a skylight on your own or hiring a professional, understanding the installation steps is critical for a successful outcome.

DIY vs. Professional Installation

While some handy homeowners may attempt to install skylights themselves, it’s important to recognize that this is a major project. A small mistake can lead to serious problems, such as roof leaks or water damage. For most, hiring a professional is the best way to ensure the skylight is properly installed and waterproofed.

  • DIY Installation: Installing a skylight yourself can save on labor costs, but it requires a significant amount of skill in carpentry and roofing. Common DIY issues include improper flashing, poor sealing, and incorrect measurements, all of which can lead to long-term damage.
  • Professional Installation: A professional will handle everything from assessing the structural integrity of your roof to ensuring the skylight is properly flashed and sealed. This option ensures peace of mind, knowing that your skylight is installed correctly and in compliance with local building codes.

Preparation and Planning

Before installing a skylight, thorough preparation and planning are essential. This includes measuring the space accurately, checking for roof obstacles (like beams or wiring), and ensuring that the roof structure can support the skylight.

  • Location Selection: It’s important to choose a spot on your roof that will provide adequate sunlight without creating too much glare or heat gain. You should also avoid areas with too many roof obstructions, such as chimneys or ventilation systems.
  • Building Codes: Make sure to check your local building codes for skylight installation regulations, which may require permits or specific installation standards.

Step-by-Step Process

Here is an overview of the installation process for those interested in a DIY project:

  1. Mark the Roof: Identify the best spot on your roof for the skylight and mark the area where it will be installed. Ensure the space is free from obstacles like beams or plumbing.
  2. Cut the Opening: Cut an opening in both the roof and ceiling. Make sure to carefully measure and cut to avoid damaging any structural elements.
  3. Install the Skylight: Place the skylight into the opening and secure it using the manufacturer’s recommended hardware.
  4. Seal and Flash: This is the most important step. Use flashing kits to ensure the edges of the skylight are properly sealed to prevent water infiltration.
  5. Waterproofing: Apply roofing tar or sealant around the flashing for added waterproofing protection.

Common Skylight Installation Mistakes to Avoid

Skylight installation is a tricky process, and even a small mistake can lead to serious issues. Avoid these common mistakes to ensure your skylight lasts for years without any problems.

  • Incorrect Measurements: One of the most common mistakes in DIY skylight installation is incorrect measurements. A skylight that is too small or too large for the roof opening can lead to structural issues, improper fit, and leaks.
  • Poor Sealing: Failing to properly seal around the edges of the skylight is the primary cause of leaks. Use high-quality flashing and sealant to ensure water doesn’t find its way into your home.
  • Inadequate Support: Skylights can be heavy, especially larger ones or those made of thick glass. Ensure your roof structure can support the added weight, or add reinforcement as needed.
  • Ignoring Local Codes: Failing to follow local building codes can lead to fines or being forced to remove the skylight altogether. Always check with local authorities before starting your project.

Maintenance and Care Tips

Once your skylight is installed, proper maintenance is key to ensuring it continues to function properly and looks great for years to come.

Cleaning Skylights

Keeping your skylight clean is important for maintaining the amount of light it lets in. Over time, dirt, dust, and debris can accumulate on the skylight’s exterior, reducing its effectiveness.

  • Cleaning Glass Skylights: Use a mild glass cleaner and a soft cloth to avoid scratching the surface. Clean the exterior at least twice a year, or more frequently if you live in a dusty or polluted area.
  • Cleaning Acrylic Skylights: Avoid abrasive cleaners, as they can scratch the acrylic surface. Use a mild detergent and water solution instead, and rinse thoroughly to avoid streaking.

Inspections for Leaks or Cracks

Regularly inspecting your skylight for cracks or leaks is essential, especially after severe weather. Look for water stains around the skylight’s interior, which could indicate a leak.

  • Check for Sealant Damage: Over time, the sealant around your skylight may wear out, leading to leaks. Inspect the edges for any signs of wear and reapply sealant as necessary.
  • Inspect for Cracks: Skylights made from acrylic or polycarbonate may develop cracks over time due to weathering or impact. Replace cracked skylights immediately to prevent water damage.

Seasonal Considerations

Seasonal changes can impact the condition of your skylight. In colder months, skylights may experience condensation, while in warmer months, they may overheat the space below.

  • Winter: Condensation is common during winter months when the warm air inside the house meets the cold glass of the skylight. To prevent moisture buildup, ensure proper ventilation and consider adding a condensation control film.
  • Summer: In hotter climates, UV-blocking films or shades can be added to reduce the amount of heat entering through the skylight, keeping the space below cooler.

Skylight Installation Costs and ROI

The cost of installing a skylight can vary significantly depending on the type, size, and complexity of the installation. However, the investment can pay off through energy savings and increased home value.

Breakdown of Costs

  • Fixed Skylights: These skylights typically cost between $200 to $600 for the unit alone, with professional installation costs ranging from $400 to $1,300.
  • Ventilated Skylights: These skylights are more expensive due to the added ventilation mechanisms, with unit costs ranging from $500 to $1,200, and installation adding another $500 to $1,500.
  • Tubular Skylights: Tubular skylights are the most affordable option, with units costing between $150 to $400 and installation ranging from $200 to $700.

Factors Affecting Prices

Several factors can influence the overall cost of skylight installation, including:

  • Roof Type: Installing skylights on a flat roof is generally more complex and expensive compared to sloped roofs.
  • Accessibility: If your roof is difficult to access, labor costs may increase due to the additional time and equipment required.
  • Energy Efficiency Features: Skylights with Low-E coatings, UV protection, or multiple glazing layers will cost more upfront but provide better energy savings over time.

ROI (Return on Investment)

Skylights can provide a strong return on investment by improving energy efficiency and increasing your home’s value. On average, homeowners can expect a return of up to 70% on skylight installation costs. Additionally, energy-efficient skylights can reduce heating and cooling bills by allowing natural light and ventilation, reducing the need for artificial lighting and air conditioning.

Conclusion

Skylights are a valuable addition to any home, offering aesthetic, functional, and energy-saving benefits. Whether you’re looking to brighten a dark room, improve ventilation, or reduce energy costs, skylights provide a versatile solution.

By carefully choosing the right type of skylight and ensuring proper installation and maintenance, you can enjoy these benefits for years to come.

Ready to transform your home? Consult with a skylight expert today to explore your options and get a personalized estimate.

FAQs

Can I install skylights myself?

Yes, DIY skylight installation is possible, but it requires a high level of skill in carpentry and roofing. If not installed correctly, skylights can leak or cause roof damage, so many homeowners prefer hiring a professional for peace of mind.

What is the most typical skylight problem?

Leaks are the most common issue with skylights, usually caused by improper installation or poor sealing. Regular inspections and proper maintenance can prevent leaks.

What angle should a skylight be?

The angle of your skylight should be 5 to 15 degrees more than your home’s geographical latitude for optimal light exposure and energy efficiency.

How long do skylights last?

The lifespan of a skylight depends on the materials used and the quality of installation, but most skylights last between 20 and 30 years with proper maintenance.

Sources

Additional Roofing Resources