Choosing between a curb-mounted and a deck-mounted skylight is a crucial decision in any construction or renovation project. Both offer natural light and ventilation, but their installation methods, suitability for different roof types, and overall performance differ significantly. This guide will delve into the key distinctions to help you make an informed choice.
What is a Curb Mounted Skylight?
A curb-mounted skylight is installed on a pre-built curb, a raised framework that sits on the roof deck. This curb provides a structural support system for the skylight itself, simplifying installation and ensuring a weathertight seal. The curb is typically made of flashing and other waterproof materials, creating a solid base for the skylight unit.
Advantages of Curb Mounted Skylights:
- Superior Weatherproofing: The curb creates a significant barrier against water penetration, making curb-mounted skylights exceptionally weather-resistant.
- Easier Installation: The raised curb simplifies the installation process and allows for more precise alignment of the skylight.
- Heavier Skylights: Can accommodate larger and heavier skylights that may be too challenging for a deck mount installation.
- Better Insulation: The space between the roof deck and the skylight allows for improved insulation, reducing heat loss and improving energy efficiency.
Disadvantages of Curb Mounted Skylights:
- More Expensive: The added cost of constructing the curb increases the overall expense of the project.
- More Complex Installation: While installation is easier once the curb is in place, building the curb itself is more labor-intensive than deck-mounted installation.
- Reduces Interior Headroom: The curb reduces the usable headroom within the building.
What is a Deck Mounted Skylight?
A deck-mounted skylight is installed directly onto the roof deck, without the use of a curb. This type of skylight relies on the precision of the flashing and sealing system to ensure watertightness.
Advantages of Deck Mounted Skylights:
- Cost-Effective: Eliminating the curb saves on materials and labor costs, making them generally less expensive than curb-mounted options.
- Simpler Installation: The installation process is typically quicker and less complex than curb-mounted skylights.
- Maintains Headroom: There is no reduction in interior headroom as there’s no curb protruding into the space.
Disadvantages of Deck Mounted Skylights:
- Less Weather Protection: Relies heavily on the accurate installation of the flashing system to prevent leaks. Any errors can lead to water damage.
- Size Limitations: Generally suitable for smaller and lighter skylights. Large or heavy skylights might be too much weight for the deck to support.
- Difficult to Install in Certain Conditions: Challenging to install on sloped or uneven roof decks.
Curb Mounted vs. Deck Mounted: Which is Right for You?
The best choice depends on several factors:
- Roof Type: Curb-mounted skylights are often better suited for flat roofs or those with low slopes, while deck-mounted are more suitable for steeper roofs.
- Skylight Size and Weight: Larger and heavier skylights are generally better installed curb-mounted for better structural support.
- Budget: Deck-mounted skylights are typically the more budget-friendly option.
- Installation Expertise: While deck-mounted installation is generally simpler, both types require skilled installation to ensure proper weatherproofing and longevity.
What are the different types of skylights?
Skylights come in various styles and materials, each with its own set of pros and cons. The choice depends on aesthetic preferences, budget, and specific needs. Popular types include fixed, venting, tubular, and even solar-powered skylights. Each type can be either curb-mounted or deck-mounted.
How much does a skylight installation cost?
The cost of skylight installation varies widely depending on the size, type, materials, and installation complexity. Curb-mounted skylights tend to be more expensive due to the added curb construction. Labor costs also significantly impact the overall expense. Getting multiple quotes from reputable contractors is essential for accurate pricing.
How long do skylights last?
The lifespan of a skylight depends on the quality of materials, proper installation, and regular maintenance. High-quality skylights, properly installed, can last for 20 years or more.
Can I install a skylight myself?
While some simpler deck-mounted skylights might seem DIY-friendly, professional installation is highly recommended for both curb-mounted and complex deck-mounted skylights. Improper installation can lead to leaks, structural damage, and void warranties.
By carefully weighing these factors and considering your specific needs, you can make an informed decision on whether a curb-mounted or deck-mounted skylight is the best choice for your home. Remember to consult with a qualified roofing contractor to discuss your options and ensure a successful installation.
