Skylight Installation: Advantages, Step-by-Step Guide, and Upkeep

Introduction

A skylight can enhance a home by increasing natural light and ventilation. While traditional windows provide illumination around the home’s perimeter, skylights brighten interior spaces such as stairwells, hallways, and rooms without external walls. Additionally, tubular skylights are an option for rooms lacking direct roof access. This guide covers the benefits, costs, considerations, installation steps, and maintenance of skylights to help homeowners make informed decisions.

Benefits of Skylights

1. Increased Natural Light: A skylight enhances illumination, reducing dependency on artificial lighting.
2. Improved Airflow: Vented skylights expel stale air while allowing fresh air to circulate.
3. Energy Efficiency: Sunlight reduces electricity consumption and heating costs.
4. Enhanced Aesthetics: Skylights create a connection to the outdoors and highlight architectural features.
5. Property Value: Installing a skylight can boost a home’s market appeal.
6. Privacy Maintenance: Skylights allow natural light without compromising privacy, unlike traditional windows.

DIY vs. Professional Installation

Installing a skylight requires experience with roofing, measuring tools, and safety equipment. It involves cutting through the roof and ensuring proper sealing to prevent leaks. Due to the complexity and risks, homeowners are advised to hire professional contractors unless they have extensive experience with roofing projects.

Skylight Installation Costs

The average skylight installation cost ranges from $1,000 to $2,700, with a median cost of $1,860. Factors influencing price include skylight type, size, roof pitch, accessibility, and labor rates. Homeowners should obtain multiple quotes to ensure fair pricing.

Considerations Before Installing a Skylight

1. Energy Efficiency: Poorly insulated skylights can impact heating and cooling efficiency.
2. Roof Type: Stick-framed roofs are easier to modify than truss-framed roofs.
3. Roof Slope: Steeper slopes can increase installation difficulty and costs.
4. Roof Condition: Reshingling may be required; installation is best during a scheduled roof replacement.
5. Leak Prevention: Proper sealing minimizes the risk of leaks.
6. Ice Dam Formation: Incorrect installation can lead to water buildup and ice dams in colder climates.

Step-by-Step Skylight Installation Guide

Step 1: Measure Roof Pitch

Determine the roof’s pitch to select the correct skylight type:

• Curb-mounted skylights: Suitable for low-pitch roofs (less than 3/12).
• Deck-mounted skylights: Ideal for steeper slopes (greater than 3/12).

Step 2: Plan Skylight Placement

Identify a location free from structural obstacles (e.g., pipes, vents, electrical wiring). Ensure compliance with local building codes if modifications are necessary.

Step 3: Cut a Rough Opening Inside

Use a stud finder to locate rafters. Cut the ceiling drywall using a drywall saw and remove insulation. Drill screws through the corners to mark the location on the roof.

Step 4: Remove Roof Shingles

Using a chalk line, mark the skylight outline on the roof. Remove shingles within and around the marked area.

Step 5: Cut the Roof Opening

Carefully cut along the chalk line using a circular saw, ensuring a helper supports the removed section to prevent damage or injury.

Step 6: Install Skylight Frame

• For curb-mounted skylights: Construct a wooden curb using 2x6s and secure it to the roof.
• For deck-mounted skylights: Install the skylight directly onto the prepared opening.

Step 7: Secure and Seal the Skylight

Nail the skylight in place and apply a waterproof membrane around the edges to prevent leaks.

Step 8: Flash and Reseal the Roof

• Install sill flashing at the bottom of the skylight.
• Use step flashing to seal the sides, alternating with shingles.
• Apply counterflashing to cover step flashing.
• Secure saddle flashing at the top to ensure water runoff.

Step 9: Finish Interior Work

Replace insulation, patch drywall, and paint the ceiling to complete the installation.

Skylight Maintenance Tips

1. Regular Dusting: Use a telescoping dust mop to prevent buildup.
2. Leak Inspection: Check every two weeks for signs of leaks or cracks.
3. Annual Deep Cleaning: Clean interior glass with a sponge and mild cleaner; use a telescoping power washer for exterior surfaces.
4. Professional Inspections: Annual assessments can detect early signs of damage.
5. Winter Care: Remove snow and ice buildup with a roof rake to prevent ice dams.

Conclusion

A skylight is a valuable home upgrade that improves lighting, ventilation, and aesthetics. While installation is complex, hiring professionals ensures proper sealing and minimizes risks. With routine maintenance, skylights remain functional and visually appealing for years, making them a worthwhile investment for homeowners.