The natural light that penetrates the house creates beautiful lighting effects, reduces energy use and enhances the architectural value of the house. As more homeowners install skylight systems, their homes become more open and light. However, the choice of the skylight mounting system is as important as the choice of the skylight.
There are two of the most popular methods of installing skylights: curb-mounted and deck-mounted. Both have their merits as natural light and beauty selections, yet they differ in their construction, installation, waterproofing, energy efficiency, maintenance and durability.
The right skylight mounting system is an essential component of roof protection and comfort for interior spaces in the Pacific Northwest, where rain and moisture are always present and can be a roof’s biggest threat. Knowing these differences will help homeowners make a well-informed decision that will satisfy their roofing needs, goals, and maintenance preferences.
Understanding Curb Mounted Skylights
A raised frame known as a curb on which a curb-mounted skylight is placed. The roof is usually a couple of inches over the curb, which is usually of wood. The skylight unit is then simply connected to the curb structure.
The installation style allows for separating the skylight from the roof deck for additional height and waterproofing versatility.
Skylights that are mounted on a curb are usually placed in:
- Low-slope roofs
- Flat roofing systems
- Commercial buildings
- Custom residential roofs
Buildings that have larger skylight openings
The skylight is placed over the roofline, and curb-mounted systems are more effective at removing water, particularly in regions with significant rainfall, such as Camas, WA.
Understanding Deck Mounted Skylights
Deck-mounted skylights can be installed on the roof deck; a raised curb structure is not necessary. The skylight’s frame adheres to the roofing material and sits at the level of the roofing surface, creating a more elegant look.
Such a skylight is typically the best choice for residential houses with steep roofs, as it presents a tidy, sleek appearance near the roof surface.
Often, a skylight is placed on the deck:
- Asphalt shingle roofs
- Steep-slope residential roofs
- Modern architectural designs
If you don’t want to make your home look more vibrant with a skylight, you can still do it.
Deck-mounted skylights may also be more pleasing to look at, as they are closer to the roofline and can be more integrated with the home design, offering significant daylight and ventilation.
How Roof Design Influences Skylight Selection
Skylights will be either curb-mounted or deck-mounted, determined by the roof pitch and the architect’s design.
Low-Slope and Flat Roof Systems
On low-slope/flat roofs, skylights are frequently installed in the raised curb, which enhances the ability to drain water around the skylight opening. Wherever possible, elevation will be used to help reduce the amount of standing water around flashing systems and the risk of moisture infiltration.
Water protection is very high on flat roofs in rainy regions, and systems installed at the curb are very effective in this application.
Steep Residential Roofs
Skylights mounted on the roof deck are a good solution for roofs with steep slopes because gravity naturally moves water away from the skylight frame.
They are also smaller than their older counterparts, which makes them easier to fit under house roofs and adds an attractive feature to the outside of the house while saving space.
Deck-mounted skylights are useful for many houses with pitched roofs in the Camas area.
Waterproofing Performance in the Camas WA Climate
One of the most crucial factors to consider for a skylight system in the Pacific Northwest is moisture protection.
The climate is rainy, and high-quality, watertight integration is important for preventing damage from leaks or structural issues.
Curb Mounted Waterproofing Advantages
Curb-mounted skylights offer increased protection by raising the skylight off the roof. This may offer additional separation from the flow of water and skylight opening.
The raised curb also provides a very flexible way to incorporate waterproofing and flashing systems over a much larger area around the building.
Some areas may be prone to flooding or snow buildup, and some drainage problems exist; the skylights in the curb-mounted position may be more moisture-resistant.
Deck Mounted Waterproofing Performance
Today’s skylights on the deck use very sophisticated flashing systems that can be made watertight with the roofing material.
When properly installed on the correct roof pitches, deck-mounted systems are extremely effective at resisting wind-driven rain and moisture.
However, proper installation is critical, as the skylight is located close to the roof deck and relies heavily on the flashing.
Installation Differences Between Curb Mounted and Deck Mounted Skylights
These two types of skylights could be used in several methods.
Curb Mounted Installation Process
If you install a curb-mounted skylight, you’ll have these components:
- Creating raised curbs by building structure.
- Attaching the curb to the roof framing
- Integrating waterproof membranes
- The placement of the curb flasher.
- Installing the skylight to the curbing.
Additional framing requirements may make it more difficult to install them on a curb.
Deck Mounted Installation Process
In general, deck-mounted skylights can be installed more quickly because they are directly connected to the roof deck.
- Installation typically includes:
- Larger openings are cut down.
- Installing waterproof underlayment
Installation of factory-designed flashing kits:
- I’m attaching the skylight frame to the deck.
The labor is saved as it is easy to install and can make a project more efficient.
Appearance and Architectural Style Considerations
When choosing the right light, another factor to consider is its appearance, particularly for those who value curb appeal and interior design.
Curb Mounted Aesthetic
A skylight high above the roofline, accessible from the outside at the curb. Some individuals prefer the structure they have created in their homes, while others would rather have a more subdued appearance.
These are typically selected for commercial projects, modern homes or big custom skylight projects.
Deck Mounted Aesthetic
Deck-mounted skylights are installed essentially flat on a roof, giving a much more natural, clean appearance.
The more aerodynamic roof is very appropriate for modern low-rise houses.
Deck-mounted systems are often preferred by homeowners in Camas for their ability to seamlessly integrate with the roof design and aesthetics. Deck-mounted systems are also often selected for their integration with the home’s overall design and for not intruding too deeply into the roofline.
Energy Efficiency Differences
When fitted with the latest Energy Star-rated insulated glazing systems, both Curb Mounted and Deck Mounted skylights can help achieve improved energy efficiency. The quality of installation and sealing will significantly impact the long-term thermal performance.
Curb Mounted Energy Performance
Insulated skylights at a curb require extra framing members around the curb structure to prevent heat loss through the framing members and/or to prevent thermal bridging.
Well-insulated curb systems can be efficient, but if they are not installed well, they may not be as efficient.
Deck Mounted Energy Performance
Typically, skylights mounted on a deck are more integrated with the roofing system and are less likely to leak air if properly installed.
Many of the units on the market today come with energy-saving glass, low-E coatings, and insulated frames that help keep the unit’s temperature more under control.
Maintenance Requirements for Both Skylight Systems
For both mounted and non-mounted skylights, routine maintenance is a good way to keep them performing well and prolong their life.
Curb Mounted Maintenance
Regular checks should be made of:
- Curb flashing
- Sealant integrity
- Waterproof membrane condition
- Drainage pathways
If not well-maintained, this kind of skylight is positioned higher above the roofline, and debris can accumulate along the skylight’s curb edge.
Deck Mounted Maintenance
Skylights that are attached to the deck should be inspected for:
- Flashing systems
- Roofing integration points
- Glass seals
- Roof drainage areas
They may not be as pronounced, but it is best to mend the flashing so that there are no leaky points.
Click to learn more about Brighten Your Home with Natural Light: The Benefits of Skylights.
Longevity and Durability Factors
The durability of a skylight is highly correlated with the installation, material type, and roof environment and exposure.
Moisture control is an important durability concern in Camas, WA, due to its damp climate.
With proper installation, a skylight can provide many years of service once installed with quality flashing, skylight materials and proper ventilation.
Skylight roofing businesses are aware of the impact of weather on skylight lifespan and the need for waterproofing.
The experts at Northwest Roof Maintenance in Vancouver, WA, realize that one of the most important components of installing a skylight is fitting it precisely to the roof, and they know how to ensure it fits the roof and meets its protective needs so it will last for years in the Pacific Northwest climate.
Cost Differences Between Curb Mounted and Deck Mounted Skylights
The price of a skylight is determined by the size, roof design, glass quality, and the needs of the glass installation.
Curb Mounted Costs
The following can add more labor and framing expense to curb-mounted skylights:
- Custom curb construction
- Additional waterproofing
- Structural modifications
- Extended installation time
They might provide better long-term protection, though, on low-slope roofs where drainage performance is important.
Deck Mounted Costs
Deck-mounted skylight designs are generally less labor-intensive and quicker to install than roof-mounted skylights,, and for a typical household roof type, this type of skylight may be a bit less expensive.
The flashing kit will also be simpler to install as a manufactured product and more efficient.
Which Skylight System Is Better for Camas WA Homes?
The type of skylight system to use will vary by building structure, design, amount of moisture exposure, and the homeowner’s preferences.
The most common use of curb-mounted skylights is for:
- Flat roofs
- Low-slope roofing systems
- Large skylight installations
- Drainage protection improvements needed for homes.
There are several things mounted over a deck that can be done with a skylight:
- Steep residential roofs
- Modern home designs
- Streamlined roof appearance
- Faster installation projects
If installed correctly, both systems can be very effective, and the waterproofing system can be integrated correctly.
Avail the best skylight repair and replacement services with us now.
Frequently Asked Questions
Are curb-mounted skylights better for rainy climates?
A skylight fitted with a raised curb that directs water away from the skylight opening provides additional drainage protection for low-slope roofs.
Do deck-mounted skylights leak more often?
Not when professionally installed. In today’s modern world, the skylight used on a deck is equipped with high-tech flashing systems that provide the best waterproofing on a pitch suitable for the skylight.
Which skylight style is more energy efficient?
With proper application of insulated glazing and sealing, both systems can be very energy efficient.
Can skylights be installed during roof replacement?
Yes. Skylights are frequently installed or removed during reroofing jobs to allow contractors to more easily install or replace flashing and waterproofing systems.
Conclusion
The factors to consider when deciding between the two types of skylights, the curb-mounted and deck-mounted, are the roof design, waterproofing, ease of installation, energy efficiency and durability in Camas, WA. Both systems offer unique benefits tailored to the characteristics of the residence and its surroundings.
Curb-mounted skylights are particularly well suited for low-slope roofing due to their high moisture resistance and excellent drainage; deck-mounted skylights are particularly well suited for pitched roofs on residences, as they are easy to install and provide a streamlined appearance. Advanced waterproofing and professional installation are key, no matter which mounting system is used, in the Pacific Northwest climate.
Homeowners who purchase quality skylight systems, in conjunction with a reputable roofing contractor, will reap the benefits of the natural light they provide, as well as the other benefits of skylights, such as enhanced comfort, energy savings, and better roofing protection. Visit your nearest area for the best roof maintenance services.
