When a skylight is leaking, fogged, or just looking tired, the first question is whether to fix it or replace it. The honest answer depends on a few things, and a good contractor will tell you when a repair is the smart move and when you would just be putting money into a unit that is on its way out.
When repair is the right call
Repair usually makes sense when the unit is fundamentally sound and the problem is specific and fixable:
- A single cracked pane in a newer skylight with a good frame.
- A failed seal on one or two glass units where the rest of the skylight is fine, on custom architectural skylights, the glass can sometimes be replaced or resealed without touching the frame. This only applies to field-built custom units, not factory-sealed VELUX or dome skylights.
- Worn venting hardware, a motor or operator that has given out while the glass is still good.
- The skylight is relatively young. If it has years of life left, fixing the one thing that went wrong is worth it.
When replacement is the smart money
Replacement is usually the better investment when:
- The dome is yellowed and brittle. Old acrylic that has hazed and gone stiff cannot be repaired, the material is spent. That is a replacement.
- Multiple things are failing at once. If the seal, the frame, and the glass are all aging, fixing one only delays the others.
- The unit is decades old. Paying to repair a forty-year-old skylight often means paying again in a year or two. New units are also far more energy efficient.
- You want better glass. If you are going to open things up anyway, upgrading to low-E or laminated glass while you do it is often worth it.
The middle path people forget
It is not always repair-or-replace-the-whole-thing. On custom and architectural skylights, there is a middle option: replace the failed glass units while keeping the sound frame. That can be far cheaper than a full rebuild and as good as new. See custom glass replacement.
How we think about it: We start at the cheapest fix that actually solves the problem and only move up the ladder when it genuinely makes sense. If a repair will hold, we will tell you. If it is throwing good money after bad, we will tell you that too.
Still not sure?
That is what the visit is for. We look at the unit, tell you honestly where it is in its life, and lay out the options, repair, glass replacement, or full replacement, with what each costs and buys you. See the cost guide for how pricing works.