How to Fix a Leaking Skylight in Woodbury NY (Step-by-Step)

What Causes a Skylight to Leak?

This is where a lot of homeowners get frustrated.

You see water around your skylight, so naturally, you think the skylight itself is broken.

Sometimes that is true.

But honestly, most of the time, the leak is coming from what is around the skylight.

Here are the most common causes:

1. Damaged Flashing

Flashing is the metal material installed around your skylight.

Its job is simple. It pushes water away from the opening.

If that flashing lifts, rusts, cracks, or was installed wrong, water can sneak underneath.

We saw this on a home in Woodbury last winter. The homeowner thought they needed all new skylights installation, but after inspecting it, the skylight itself was fine. The flashing had simply pulled away after years of freeze-thaw weather.

2. Old Sealant

Roof sealants do not last forever.

After years of sun, snow, rain, and temperature changes, the sealant can dry out and crack.

Once that happens, water finds its way in.

3. Roof Damage Around the Skylight

Sometimes the problem is not the skylight at all.

A missing shingle, cracked shingle, or worn roofing material nearby can direct water toward the skylight opening.

Then the skylight gets blamed.

4. Condensation

This one fools people all the time.

Sometimes what looks like a leak is actually moisture building up inside your home.

Bathrooms, kitchens, and upstairs bedrooms often have this issue.

How Do You Know If Your Skylight Is Leaking?

Not every skylight leak looks dramatic.

Sometimes it starts small.

Here are signs to watch for:

• Brown water stains on the ceiling
• Paint bubbling or peeling
• A musty smell near the skylight
• Dripping during heavy rain
• Damp drywall
• Drafts around the frame

If you see any of these, it is worth checking sooner rather than later.

Water damage rarely gets cheaper.

How to Fix a Leaking Skylight Step by Step

Now let’s talk about the actual fix.

Step 1: Find Where the Water Is Coming From

Before you repair anything, figure out where the leak starts.

Check:

• The skylight frame
• The ceiling around it
• The attic above it
• The roofing outside

Water can travel before it drips, so the stain you see may not be exactly where the leak starts.

That part trips up a lot of homeowners.

Step 2: Protect the Area Inside

Before you work outside, protect your home.

Grab:

• Buckets
• Towels
• Plastic sheets

This keeps your floors, furniture, or drywall from getting worse.

Not exciting, but it matters.

Step 3: Check the Roof Around the Skylight

Once the roof is dry and safe, look for:

• Missing shingles
• Cracked sealant
• Loose flashing
• Leaves or debris

In Woodbury, we see a lot of leaves pile up around skylights during fall.

That trapped moisture can slowly cause leaks.

Step 4: Replace Cracked Sealant

If the leak is coming from old sealant, you may be able to fix it by:

1. Removing the old cracked material
2. Cleaning the area
3. Applying roofing-grade sealant
4. Letting it cure properly

This can work for minor leaks.

But if the flashing is damaged, sealant alone usually will not last.

Step 5: Repair the Flashing

This is where many skylight leaks start.

A proper repair may involve:

• Removing shingles around the skylight
• Replacing damaged flashing
• Installing new underlayment
• Putting shingles back correctly

This is usually where calling a pro makes sense.

When Should You Stop DIY and Call a Pro?

Honestly?

If you are climbing on a steep roof, dealing with active leaks, or seeing ceiling damage inside, it is probably time.

A lot of DIY skylight repairs work for a few weeks.

Then the next storm comes.

Then the leak comes back.

We have seen homeowners spend more money fixing failed DIY patches than if they had just called a roofing pro in the first place.

Frequently Asked Questions