Should you replace your skylights, and if so, when? Short answer: if a skylight is leaking, foggy, or 15 to 20+ years old, it is likely due, and the smartest, cheapest time to replace it is during a roof replacement, when you save roughly $700 to $1,000 per skylight. Skylight replacement in Colorado typically runs $1,180 to $5,200 per skylight installed. Here is everything you should know before you decide.

I am Patrick Knackendoffel, founder of WestPro Home Exteriors. Skylights are one of the most common sources of roof leaks we see in Colorado, and they are also one of the easiest things to get wrong if the timing and flashing are not handled correctly. This guide walks through when to replace, why sequence matters, the brands we trust for our climate, and what it actually costs.

When Should You Replace Your Skylights?

It comes down to condition. If a skylight is leaking at the frame, fogging up, or performing poorly, it is telling you something. The common signs it is time:

  • Condensation forming between the glass panes
  • Visible cracking or yellowing
  • Persistent leaks around the frame
  • The skylight is 15 to 20 or more years old

Older skylights are a common source of energy loss and water intrusion, because the seals and flashing deteriorate over time. Colorado is especially hard on them. Our intense UV, combined with freeze-thaw cycling and the constant expansion and contraction that comes with it, breaks down skylight seals and flashing faster than in milder climates.

Here is the key timing insight: if your roof is already due for replacement, that is the ideal moment to address the skylights too. More on why that matters below.

Why Replace Skylights During a Roof Replacement?

If you are replacing your roof, replacing the skylights at the same time is almost always the right call, and we strongly recommend it. Here is why.

When the roof is already torn off, the area around the skylight is fully exposed. That lets us properly integrate new flashing and seal everything correctly, which is the single most important factor in whether a skylight leaks down the road.

It also saves you money. Doing it during the roof replacement saves roughly $700 to $1,000 per skylight compared to handling it as a separate project later. The reason is simple: the area is already open, so there is no extra labor to access it.

Doing it later is the expensive path. Replacing a skylight after a new roof is on means opening up a section of brand-new roofing, which involves more labor, more risk, and more cost. You essentially pay twice to get into the same spot.

What Skylight Brands Do We Install?

We install Velux skylights, which we consider the best skylight for Colorado. They are efficient, they are well-designed, and they are surprisingly durable against hail, which matters a great deal here.

Velux offers a full range of options:

  • Curb-mount and deck-mount styles
  • Fixed and venting skylights
  • Solar venting models
  • Energy-efficient glazing and impact-resistant glass options built for our hail climate

One thing worth knowing if you are doing a standalone skylight replacement, meaning not during a re-roof: some deck-mount models require a complete roof repair around the skylight to account for proper flashing integration. Curb-mount skylights, on the other hand, can typically be replaced without disturbing the surrounding roofing, as long as the existing flashing is in optimal condition.

We can walk you through which option fits your roof during the inspection process.

How Much Do New Skylights Cost in Colorado?

According to our data, skylight replacement ranges from about $1,180 to $5,200 per skylight installed. Where you land in that range depends on a few things:

  • The type: curb-mount, deck-mount, fixed, venting, or solar venting
  • The skylight size
  • Whether it is done during a roof replacement or on its own

That last factor is a big one. Replacing during a roof replacement saves about $700 to $1,000 per skylight, because the area is already open and easy to work around. A standalone replacement adds labor for the roofing work required around the skylight.

We can always provide exact pricing after a free roof inspection, since the real number depends on your specific roof and skylights.

Do You Have to Replace Your Skylights During a Roof Replacement?

No. This is a common misconception, and we will always give you the honest answer.

If your skylights are in good condition, we can simply re-roof around them, replacing just the flashing around the skylight. That is fairly easy for us to do and cost-effective for you. There is no reason to replace a skylight that is performing well and has years of life left in it just because the roof is being done.

The point of the inspection is to tell you the truth about what your skylights actually need, not to sell you skylights you do not.

Roof or skylights giving you problems?

Our inspections are always free, and we will give you a straight assessment of whether your skylights need replacement or can simply be flashed and left in place.

Get a free inspection

Frequently Asked Questions

How do I know if my skylight needs to be replaced?

Look for condensation or fogging between the glass panes, visible cracking or yellowing, persistent leaks around the frame, or an age of 15 to 20+ years. Any of these are signs it is time for an inspection.

Why is it cheaper to replace skylights during a roof replacement?

Because the roof is already torn off and the area around the skylight is fully exposed, there is no extra labor to access it. That saves roughly $700 to $1,000 per skylight compared to a standalone replacement later.

How much does skylight replacement cost in Colorado?

Roughly $1,180 to $5,200 per skylight installed, depending on the type, size, and whether it is done during a roof replacement. Exact pricing comes after a free inspection.

What is the best skylight brand for Colorado?

We install Velux for its efficiency, design, and durability against hail, with impact-resistant glass options that make sense for our climate.

Do I have to replace my skylights when I replace my roof?

No. If they are in good condition, we can re-roof around them and replace only the flashing, which is easier and more cost-effective for you.


About the Author: Written by Patrick Knackendoffel, founder of WestPro Home Exteriors in Longmont, CO. A roofing and exterior remodeling professional working in the trade since 2011.

About WestPro Home Exteriors: Licensed and insured roofing, siding, gutter, and window replacement contractor in Longmont, CO. GAF Master Elite Roofing Contractor. James Hardie Elite Preferred Contractor. Pella Windows Platinum Certified Contractor. Serving Longmont, Boulder, Denver, Fort Collins, Loveland, Estes Park, and the surrounding Colorado Front Range.