A properly installed skylight should deliver decades of natural light, comfort, and curb appeal. In fact, most high-quality units—especially those from Velux—are designed to last around 30 years. At M&M Skylights, serving homeowners across Massachusetts, New Hampshire, and Maine, we routinely see skylights that are 35 years old or more and still functioning. Even so, many homeowners choose to replace aging skylights to improve energy efficiency, prevent future issues, and take advantage of today’s advanced features.
So how do you know when it’s time for a skylight replacement rather than a repair? Here are the signs and considerations to keep in mind.
Your Skylight Is 20–30+ Years Old
Age alone doesn’t always mean failure, but it is the biggest indicator that a skylight is nearing the end of its service life. Weather, temperature swings, and exposure to UV rays gradually wear down seals, flashing, and frames. In New England’s harsh climate—where winters are icy, and summers can be humid—these aging components weaken faster. If your skylight is approaching the 30-year mark, planning for replacement is a smart preventative step.
Condensation or Fogging Between Glass Panes
If you notice persistent fog, hazing, or moisture trapped inside the glass, the seal has likely failed. Once this happens, the skylight loses its insulating power, driving up energy costs and increasing the chance of leaks.
Drafts or Temperature Fluctuations
A well-sealed skylight should not introduce noticeable drafts. If the area around your skylight feels colder in winter or warmer in summer, it might no longer be performing efficiently. Newer models offer far superior insulation, UV protection, and thermal performance.
Visible Damage or Leaking
Cracks, bubbling paint, stained drywall, or water spots near the skylight are red flags. Even minor leaks can lead to major roof damage, especially during heavy New England rain or snowmelt. Replacing the skylight—and ensuring proper flashing installation—eliminates the root cause instead of temporarily masking it.
You’re Upgrading Your Roof
If you’re replacing your roof, it’s the perfect time to replace the skylight. Installing a new roof around an old skylight often leads to problems later and can cost more in the long run.
Skylight Replacement in MA, NH, and ME | M&M Skylights
Whether your skylight is aging, leaking, or simply inefficient, M&M Skylights offers expert guidance and professional installation throughout MA, NH, and ME. If you’re unsure about your next step, we’re happy to assess your skylight and help you make the best choice for your home. Contact us at 978-945-9412 to learn more or request a free estimate.