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Mr-Glass Roofing: The Los Angeles Owner’s Guide
If you have a Mr-Glass roofing installation and a skylight, glass panel, or glazing seal has failed, we stock the replacement parts and install them for $470 to $2,125 depending on the panel size and seal work, with most Los Angeles jobs done in a single visit. Most owners discover the failure the hard way: a water stain on the ceiling after the first real rain, a hairline crack you can’t unsee once you notice it, or a whistling sound when the Santa Anas kick up. In Los Angeles, our UV exposure and the temperature swings between the Valley heat and coastal fog are harder on glass seals than almost anywhere else in California. You’re not crazy for thinking the roofline looked fine last spring; these failures usually start small and show up all at once.
Which Mr-Glass Models This Applies To
Mr-Glass roofing systems generally fall into three categories: fixed skylights, operable ventilating units, and glass-to-curb or glass-to-deck assemblies. The replacement part you need depends on which one you have, and getting it wrong is a $300 mistake that still leaks. Look for the model plate on the interior frame or the curb, usually a stamped aluminum tag with a three-digit series code and a glass thickness spec like 3/8″ or 1/2″ tempered. If the tag is gone, measure the visible glass dimension to the nearest 1/8 inch and check whether the glazing sits flush or recessed; we use that plus the frame color to match the right series. For Mr-Glass units specifically, OEM seals and gaskets tend to dry-rot faster than the glass itself fails, so a “broken skylight” is often just a dead gasket that looks like a bigger problem than it is. We install both OEM and quality aftermarket glass, but for anything still under a transferable manufacturer warranty, we recommend OEM so the warranty stays intact.
Styles & brands we work with
Signs Your Mr-Glass Roofing Is Failing
- Water staining on the ceiling or drywall below the unit. This almost always means the curb seal or the glazing gasket has failed, not the glass. The water pools and follows a truss line, so the stain often shows up a few feet away from the actual leak.
- Visible condensation between the panes. That’s a failed insulated glass unit (IGU). The desiccant inside the spacer is spent, the argon’s gone, and no amount of caulk fixes it. The panel gets replaced, not repaired.
- Cracking or crazing in the glass. In Los Angeles, thermal stress does this: hot direct sun on one edge, cold shade on another, and the glass eventually develops a stress crack. Impact cracks from tree branches or a stray baseball look different, a web pattern from a single point instead of a clean line.
- Whistling or air movement you can feel. This means the gasket has compressed or torn and the unit isn’t sealing. In a Santa Ana wind event, that whistle gets loud enough to hear from another room.
- Discoloration or white crust on the aluminum frame. Galvanic corrosion from years of morning marine layer, especially in westside neighborhoods or anywhere within a few miles of the coast. The frame is failing, and if left alone, the glazing channel will eat itself.
See the difference
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After
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AfterReplacement Cost & What’s Included
In Los Angeles, expect to pay $470 to $2,125 installed for most Mr-Glass roofing repairs and glass replacements. A simple gasket replacement on a fixed skylight sits at the low end. A full insulated glass unit swap on a large operable skylight, with new gaskets, new curb sealant, and a water test, lands at the high end. The biggest cost drivers are glass size, whether we can access the unit from the roof or need interior scaffolding, and whether the curb itself has rot or corrosion that needs rebuilding before the new unit goes in. Every quote is a written line-item price before work starts, so you’ll see the glass cost, the seal parts, and the labor separated on paper. The work itself is covered by our 365-Day Done Right Promise: if anything’s not right within a year of completion, we come back and make it right at no charge to you.
DIY or Call Us?
What you can safely do yourself: look at the interior frame for a model tag, photograph the damage in daylight from inside and from the roof if you have safe access, and put a bucket under an active drip. That’s it. What you shouldn’t do: climb onto a pitched Los Angeles roof mid-summer, when the surface is hot enough to burn through a work glove and one loose tile sends you off the edge. Glass under tension, sharp aluminum, and a two-story fall are real risks, and they’re not worth saving a few hundred dollars. If you’re sure it’s just a gasket and the unit is ground-accessible, that’s a borderline DIY job. Everything else, call us at (803) 680-2547 and we’ll send someone who has done this a few hundred times.
FAQs
A well-installed Mr-Glass skylight with quality seals typically lasts 15 to 20 years in Los Angeles, but the glazing gaskets and curb sealant usually need replacement around the 8-to-12-year mark, sooner within a few miles of the coast where salt air accelerates rubber breakdown. The glass itself can last decades; it’s the parts around the glass that go first. If your unit is over ten years old and you’re seeing condensation, plan for a full IGU replacement rather than a seal fix. Call (803) 680-2547 for an exact assessment; estimates are free.
No. Glass cannot be structurally repaired, and any attempt to patch or resin-fill a cracked roof glazing panel is a temporary visual fix that leaves the seal compromised and the unit unsafe. The panel gets replaced as a complete insulated glass unit, which is actually good news because the new IGU comes with a fresh desiccant seal and a clean warranty. That said, if the crack is small and completely dry, you don’t have to rush the job; call us and we’ll give you an honest timeline. Call (803) 680-2547 to schedule a look.
Most Mr-Glass glass and gasket replacements in Los Angeles are completed in three to five hours on-site, including removal of the old unit, curb inspection and reseal, new glazing install, and a water test at the end. If the curb needs rebuilding, add a day. You’ll know the exact time frame before work starts because it’s in the written quote you approve in advance.
We stock the most commonly replaced Mr-Glass gaskets, curb seals, and standard-size insulated glass units on our trucks, so a good number of Los Angeles repair calls are completed the same visit. Odd sizes and custom glazing are ordered and usually in hand within three to five business days. We’ll tell you in the first phone call whether yours is a stock item or a special order.
Written by Isaac Pruett, Owner, Mason Remodeling at Mason Remodeling, serving Los Angeles and nearby areas.
