Have you ever walked into a room and wished it had more natural light? Adding a skylight might be exactly what your Medford home needs. A skylight not only brightens your space but can also make it feel larger, warmer, and more inviting.
To install a skylight, cut an opening in your roof, reinforce the framing, install the skylight curb, and apply sill and step flashing to waterproof it. Finally, seal the edges and test for leaks.
In short: Measure. Cut. Flash. Seal. Shine.
Tools and Materials You’ll Need
Before you start fitting a skylight, gather these essentials:
| Tool / Material | 🪚 Purpose |
| Circular or reciprocating saw | Cut through roof decking and shingles |
| Hammer & nails | Frame and secure supports |
| Flashing kit & underlayment | Keep water out |
| Roof sealant & silicone caulk | Seal edges for waterproofing |
| Safety harness, gloves, goggles | Essential for roof safety |
| Measuring tape & chalk line | Precise layout and alignment |
| Ladder or scaffold | Safe roof access |
Safety First: Working on a roof is risky. Always use non-slip shoes and a harness or call FRS Roofing to handle it safely.
Step-by-Step Skylight Installation Process
Let’s go through how to fit a skylight properly step by step.
Step 1: Mark and Cut the Opening
- Measure between rafters and mark your skylight outline.
- Use your circular saw to cut through the roof decking carefully.
- Avoid rafters because they support your roof structure.
Think of this as putting a skylight on your roof accuracy here sets the tone for the entire project.
Step 2: Frame and Reinforce the Opening
Once the hole is open, it’s time to reinforce.
- Add headers between rafters to maintain strength.
- Nail framing tightly a solid base ensures your skylight doesn’t shift or leak.
A sturdy frame means no sagging, no leaks, and no worries.
Step 3: Install the Skylight Curb or Base
Most roof skylight installations need a curb raised frame that supports the skylight.
- Use treated lumber for the curb.
- Apply underlayment around the edges for waterproofing.
- Make sure the curb is perfectly level before moving on.
Step 4: Place the Skylight Unit
Now for the exciting part of setting the skylight!
- Center it on the curb and align it with your markings.
- Fasten it with manufacturer-provided brackets.
- Check alignment from inside before sealing it permanently.
This is where your room starts to literally “light up.”
Step 5: Add Sill Flashing
Flashing is like your skylight’s raincoat; it keeps water out.
- Start from the bottom edge (the sill).
- Overlap the flashing pieces to direct water downward.
- The nail gently doesn’t puncture through the skylight frame.
Step 6: Step Flash the Sides
This is crucial for waterproofing.
- Add step flashing on both sides of the skylight.
- Overlap each new piece over the previous one.
- Tuck shingles neatly over flashing for a seamless finish.
If you’re doing a DIY skylight, remember: improper flashing = guaranteed leaks.
Step 7: Add Counterflashing and Saddle Flashing
- Install counterflashing along the top and sides.
- Finish with saddle flashing at the peak to deflect rain.
- Double-check that every piece overlaps properly.
This step is especially important for flat roof skylight installation since water can pool if it’s not sealed perfectly.
Step 8: Seal and Test for Leaks
Once all flashing is done:
- Apply roofing cement or silicone caulk along every joint.
- Spray water over the skylight to check for leaks.
- Look for any dampness or light gaps inside.
No leaks? Congratulations you’ve just completed your skylight setup like a pro!
How to Install a Skylight on an Existing Roof
Installing a skylight on an existing roof requires a few extra precautions.
Here’s what to do:
- Inspect attic clearance before cutting. Avoid rafters or wiring.
- Lift shingles carefully around your cut line.
- Cut your hole and frame it as usual.
- Add extra flashing layers to compensate for old shingles.
- Seal with high-grade roofing caulk for extra leak protection.
This method works for older Medford homes that didn’t originally have skylights.
Common Mistakes to Avoid
When you’re learning how to add a skylight, it’s easy to make small errors that cause big problems later.
- Cutting too close to rafters
- Forgetting to reinforce framing
- Incorrect flashing order (bottom → sides → top)
- Skipping underlayment
- Ignoring roof slope (water should flow down, not in!)
Even small mistakes can cause big leaks later if you’re unsure, call FRS Roofing for expert help.
Skylight Installation Cost in Medford
Let’s talk numbers. Here’s what skylight installation costs typically look like in Medford:
| Type | Average Cost (USD) | Includes |
| Fixed Skylight | $1,000–$1,500 | Labor + materials |
| Venting / Operable Skylight | $1,500–$2,500 | Electrical + installation |
| Custom or Oversized | $2,500–$3,500+ | Custom framing + flashing |
| DIY Skylight Setup | $500–$900 | Materials only (no labor) |
DIY saves money, but leaks can be costly later. For reliability, FRS Roofing offers affordable skylight installation packages across Medford.
Cost Comparison Chart: DIY vs Professional
| Factor | DIY Skylights | Professional Skylight Installation (FRS Roofing) |
| Average Cost | $700–$1,000 | $1,200–$2,500 |
| Time Required | 1–2 days | 6–8 hours |
| Leak Risk | High (if not flashed properly) | Very Low |
| Warranty | Usually none | Full labor + product warranty |
| Safety | Must use harness | Insured and certified technicians |
Professional installation offers better long-term value and fewer headaches.
Maintenance Tips After Installation
Once your skylight is shining bright, keep it that way with these maintenance steps:
- Clean skylight glass twice a year using a soft cloth and mild soap.
- Inspect flashing every spring and fall for signs of rust or gaps.
- Reseal joints if you spot condensation or leaks.
- Clear leaves and snow from around the skylight regularly.
Routine care prevents expensive repairs and keeps natural light pouring in.
DIY vs Professional Skylight Installation
Thinking about fitting a skylight yourself vs hiring pros? Here’s the breakdown:
| Aspect | DIY Skylights | FRS Roofing (Professional) |
| Skill Needed | Advanced roofing & carpentry | None (experts handle it) |
| Time | 1–2 days | Half-day install |
| Cost | Lower upfront | Higher upfront, lower long-term |
| Risk of Leaks | Moderate to high | Minimal |
| Warranty | None | Full product + labor warranty |
| Peace of Mind | Stressful | Total confidence |
If you love DIY, go for it but if you value safety and precision, FRS Roofing has you covered.
FAQs About Skylight Installation
Q1: Can I install a skylight on any roof type?
Yes! But flat or low-slope roofs need special flashing kits to prevent leaks.
Q2: How long does it take to install a skylight?
Typically 6–8 hours for one unit. Larger or custom skylights may take a full day.
Q3: How do I stop skylight condensation?
Use proper insulation and ventilation. Venting skylights also help reduce humidity.
Q4: Can you install a skylight if you have an attic?
Absolutely. You’ll just need to build a light shaft connecting the roof skylight to the ceiling below.
Q5: What’s the best season for installing skylights in Medford?
Spring and fall are ideal milder weather, less rain, and easier roof work conditions.
Final Thoughts
Installing a skylight can completely transform your Medford home making your living spaces brighter, cozier, and more energy-efficient. But whether you’re learning how to install skylight systems yourself or prefer to leave it to the pros, remember: precision is everything.
If you’d rather skip the ladder and guarantee a leak-free result, contact FRS Roofing Medford’s trusted skylight installation experts.
We’ll handle everything from roof skylight installation to repairs and replacements, ensuring your home stays beautiful, bright, and dry. ️ Bring sunlight into your home the safe, professional way.