A leaking skylight can quickly turn from a minor annoyance into a major home repair headache. Water stains, peeling paint, or even mold growth may appear before you ever notice a drip. The good news is that not every skylight leak requires a full replacement, but identifying the true source of the problem is the first critical step.
Can you repair your leaking skylight? Here’s how to find the source of the leak and determine whether you should repair or replace your skylight.
Tracing the Leak
One of the trickiest aspects of skylight leaks is that the water doesn’t always enter directly above the damage you see. Water can travel along roofing materials, beams, or insulation before it becomes visible inside your home. That means a leak that appears to come from the skylight could actually originate from damaged shingles, improper flashing, or nearby clogged drainage channels. Signs to watch for include discoloration around the skylight frame, bubbling drywall, condensation between glass panes, or damp spots after heavy rain or snowmelt.
Can You Repair It?
Once the source is identified, repairs may be possible depending on the cause and the skylight’s condition. Minor issues—such as cracked sealant, small gaps in flashing, or debris buildup—can often be fixed without replacing the entire unit. Resealing the edges, repairing or replacing flashing, and clearing weep holes are common solutions that can restore proper function. If the skylight itself is structurally sound and relatively new, repair is usually the most cost-effective route.
When It’s Time to Replace
However, there are situations where replacement is the better option. If the skylight is old, inefficient, or has recurring leaks, repairs may only provide temporary relief. Cracks in the glass, warped frames, or failed seals between panes (which cause fogging) are strong indicators that the unit has reached the end of its lifespan. Additionally, if the skylight was poorly installed to begin with, replacing it with a modern, energy-efficient model can prevent ongoing problems and improve insulation.
Repair or Replace a Leaking Skylight with M&M Skylights
Ultimately, the decision comes down to the extent of the damage, the skylight’s age, and the root cause of the leak. Our team at M&M Skylights can thoroughly inspect your skylight and the surrounding roof area to identify the source of the leak and determine whether you can repair it. When we’re finished, your home will once again be well-lit and leak-free.