A solar tube on the roof, also called a sun tunnel or tubular skylight, is a small dome that catches daylight and sends it down a reflective tube to a ceiling diffuser. King Roof Care offers skylight installation for homes in Kirkland, Bothell, Everett, Issaquah and Redmond, WA, and a Google review mentions a recent Sola tube install. Below are how solar tubes work, trade-offs and estimate questions.
How a Solar Tube on the Roof Brings Daylight Indoors
A solar tube works in three stages: a clear dome on the roof captures daylight, a reflective tube guides that light through the attic, and a diffuser in the ceiling spreads it across the room below.
- Rigid tubes or flexible tubes for the light path
- Extension tubes for longer runs between the roof and ceiling
- Low-profile or pitched domes
- Round or square ceiling diffusers
- Integrated light kits that add electric light for night use
- Ventilation add-ons for bathrooms and similar rooms
- Impact-rated or wildfire-glass versions in some product lines
Solar Tubes vs. Traditional Skylights: Which Fits the Room?
Solar tubes and traditional skylights both bring daylight through the roof, but they solve different problems. A traditional skylight is a framed window in the roof plane, while a solar tube is a compact light channel that runs through the attic.
| Factor | Solar tube (sun tunnel) | Traditional skylight |
|---|---|---|
| Roof opening | Small round opening | Larger framed opening |
| Ceiling work | Small cut for the diffuser | Framed light shaft and drywall finishing |
| View of the sky | No view; diffused light only | Direct view of the sky |
| Ventilation | Only with a vent add-on, if offered | Venting models available |
| Attic in the way | Tube routes through the attic | Shaft must be framed through the attic |
| Best-suited rooms | Hallways, baths, closets, kitchens | Living rooms, vaulted ceilings, lofts |
| Light at night | Only with a light kit | None without separate fixtures |
Decision Checklist Before Choosing a Solar Tube Location
A solar tube installation goes more smoothly when the homeowner answers a few questions before the estimate visit. The answers help match the tube size and kit to the room and avoid surprises in the attic.
- Which room needs daylight most, and is it a room you use during the day?
- Is there attic space above the ceiling, or is the ceiling vaulted with no attic?
- Which roof faces sit above that room, and is anything shading that part of the roof?
- Are there rafters, joists, ductwork, wiring or plumbing vents between the roof and the planned ceiling spot?
- Would a vent add-on or a night-light kit be useful in that room?
- What roofing material is on the house, and how old is the roof?
- Do you prefer a round or square ceiling diffuser to match existing fixtures?
- Does a homeowners association need to review roof changes in your neighborhood?
Sun Tunnel Skylight Installation: A Typical Step-by-Step Sequence
Sun tunnel skylight installation follows a general sequence, though the exact order depends on the product instructions, the roof and the attic layout. Some phases can overlap, and the installer may adjust the order on site.
- Confirm the ceiling location from inside the room and check the attic path above it
- Mark the roof position so the tube runs as straight as the framing allows
- Cut the ceiling opening for the diffuser ring
- Cut the roof opening and prepare the surrounding roofing and underlayment
- Set the flashing base so it integrates with the surrounding roofing material
- Install the dome on the flashing
- Connect the tube sections or the flexible tube between the roof and ceiling
- Seal the tube joints according to the product instructions
- Install the ceiling diffuser and any light kit or vent add-on
- Check the install from the attic and the room, then clean up the work area
Roofing Material and Flashing: Why the Roof Matters Most
A solar tube is a roof penetration, so the flashing around the dome deserves as much attention as the tube itself. King Roof Care works with composition, asphalt shingle, wood shake, presidential shingle, PVC and metal roofing systems, and the flashing approach has to suit whichever material is on the house.
What to Compare in a Solar Tube Installation Estimate
Solar tube installation estimates can look similar at first glance, so comparing them line by line helps homeowners see what each quote actually includes. King Roof Care provides free roof assessments and estimates before any work begins.
- The exact product, tube diameter and tube type (rigid or flexible)
- The number of tube extensions or elbows needed for the run
- The dome style and the flashing type matched to your roofing material
- Roof prep, including how the roofing and underlayment around the opening are handled
- Repairs to hidden damage, such as soft sheathing found when the roof is opened
- Ceiling cutting, diffuser installation and any drywall touch-up
- Optional light kits or vent add-ons and the wiring they may need
- Debris removal and cleanup of the room and attic
- Items that are excluded, such as painting or electrical work by others
Mistakes That Cause Rework and How to Prepare the Room
Solar tube rework usually traces back to planning decisions made before the roof is cut. Avoiding the mistakes below protects both the roof and the ceiling.
Solar Tube Installers Serving Kirkland, Bothell, Everett, Issaquah and Redmond
King Roof Care offers skylight installation and roofing services from its base at 16007 NE 6th St in Bellevue, WA, serving Kirkland, Bothell, Everett, Issaquah, Redmond and neighboring cities. The company is a registered Washington construction contractor, L&I registration KINGRRC782QA (verify at lni.wa.gov).
Frequently asked questions
Do solar tubes actually work?
Solar tubes do work for bringing natural daylight into rooms that lack windows, such as hallways, bathrooms and closets. The amount of light depends on daylight conditions, the roof face, shading, the tube type and how many bends the tube needs. Solar tubes provide diffused light, not a view, and they add no light at night unless a light kit is installed.
What is the average cost of a solar tube?
The cost of a solar tube depends on the product, tube size, tube length, roofing material, attic access and any add-ons such as light kits or vents. No sourced price figure is quoted here. King Roof Care provides free roof assessments and estimates before any work begins, so you can compare a specific scope.
What are the downsides of using solar tubes?
The downsides of solar tubes are that they give no view of the sky, light output varies with daylight, and they need a light kit for night use. A solar tube is also a roof penetration, so flashing must be installed correctly, and attic framing or ducts can limit where the tube can go.
How long do solar tubes typically last?
How long solar tubes last depends on the product, the dome material, the flashing and the condition of the roof around it. Check the manufacturer's product documentation for expected service life, and have the dome and flashing looked at during routine roof inspections.