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Mr-Glass Roofing: The Orange County Owner’s Guide
If you have a Mr-Glass skylight, sun tunnel, or glass roof panel that’s failed, we stock and install Mr-Glass-compatible replacement parts across Orange County, with most swaps running $400 to $1,800 installed depending on the unit and what’s failed. The most common call we get is a Mr-Glass dome or glazing panel that’s cracked, fogged, or leaking around the curb mount after a few Southern California summers. You’ll usually notice it as a drip during winter rain, condensation trapped between glass layers, or a hairline crack that shows up after a hot spell in Anaheim Hills or a Santa Ana wind event near Fullerton.
Here’s the straight answer on how this works: Mr-Glass units are built around specific curb dimensions and glazing thicknesses, and the part that fails is almost never the glass itself. It’s the seal, the flashing, or the curb. That’s good news, because those are the parts that cost the least to replace when caught early.
Which Mr-Glass Models This Applies To
Mr-Glass roofing products in Orange County break down into three families: fixed skylights, vented skylights with manual or motorized operators, and tubular sun tunnels. The fixed units are the most common across older track homes in Anaheim, Garden Grove, and Santa Ana, where the original installs date back to the 1980s and 1990s. Vented units show up more in custom builds in Yorba Linda and parts of Irvine, and tubular units are everywhere in interior bathrooms and hallways that never see direct roof access.
Here’s the compatibility gotcha most Orange County homeowners hit: Mr-Glass changed curb-mount dimensions between their early series and the current production runs. A dome from a 1994 unit will not drop onto a 2015 curb without an adapter or a curb rebuild. We identify the right part by checking the etched label on the glass edge, measuring the outside curb dimensions, and checking the glazing thickness with a caliper. If the label is gone, we match by measurement and frame profile.
On OEM versus aftermarket: Mr-Glass OEM glazing panels are still available for most production years, but lead times can run two to three weeks. Quality aftermarket equivalents, built to the same curb specs and glazing thickness, are often in stock locally in Orange County and carry the same thermal performance rating. We’ll tell you which route fits your timeline and budget, and we put that in writing before any work starts.
Styles & brands we work with
Signs Your Mr-Glass Roofing Is Failing
- Water staining on the ceiling drywall around the unit. This is almost always the curb flashing or sealant, not the glazing. The sealant breaks down after years of UV exposure and temperature swings between inland heat and coastal marine air, and water wicks in along the curb seam.
- Fogged or cloudy glazing that won’t clear. This means the insulated glass seal has failed and moisture is trapped between panes. You can’t dry it out, and the thermal performance is gone. The panel needs replacement.
- A visible crack in the dome or flat glass panel. In Orange County, we see this after Santa Ana wind events throw debris onto roofs, or after temperature stress on older annealed glass. A cracked panel will fail the next heavy rain, no question.
- The vented unit won’t open, or opens partway and sticks. This is usually the operator chain or motor, not the glass. Replacing the operator assembly restores function without touching the curb or flashing.
- Daylight visible at the curb seam from inside the attic. Get up there with a flashlight on a sunny day. If you can see light around the curb, the weather seal is gone and water will follow.
See the difference
Before
After
Before
After
Before
AfterReplacement Cost & What’s Included
In Orange County, Mr-Glass roofing part replacement typically runs $400 to $1,800 installed, depending on what’s failed and the access involved. Here’s how that breaks down:
- Flashing or sealant repair around an existing curb: $400 to $900. This is the most common fix when the glazing is still intact.
- Replacement glazing panel or dome, standard fixed unit: $800 to $1,500 installed, including new gaskets and sealant.
- Vented operator assembly replacement (manual or motorized): $500 to $1,200 installed, depending on motor and control type.
- Tubular sun tunnel dome and flashing replacement: $600 to $1,800 installed, depending on roof pitch and access.
What drives the range: roof pitch and access, whether the curb needs rebuilding, single-story versus two-story ladder work, and OEM versus aftermarket part lead time. Every quote we write includes the part, labor, sealant, and cleanup as one fixed number. That number does not change at the door. Our work is covered by the 365-Day Done Right Promise: if the repair fails within a year, we come back and fix it at no charge. That’s in writing, every job.
DIY or Call Us?
What you can safely do: inspect from inside the attic with a flashlight, check for daylight at the curb seam, and clear debris off the roof around the unit if you can access it safely from a ladder with a spotter. What you should not do: remove a skylight dome or touch curb flashing yourself. Roof work on any pitch is a fall risk, and once you break the weather seal, you’re one rainstorm away from interior water damage. If the glazing is cracked, do not stand under it or try to remove it from below. Glass panels under tension can drop shards when disturbed.
This is the kind of job where a wrong sealant choice or a mis-measured curb turns a $600 repair into a $3,000 water-damage claim. We’ve been called out to fix homeowner installs in Irvine and Costa Mesa where the wrong flashing size was used and the leak came back in six weeks. Call us at (562) 262-2907 and we’ll send a background-checked, uniformed technician to measure, price it in writing, and get it done right.
FAQs
Expect 15 to 25 years from the glazing panel and 10 to 15 years from the flashing and sealant in Orange County’s UV-heavy climate. The sealant fails before the glass, which is why we check curb seals on every maintenance visit.
Yes, if the failure is in the flashing, sealant, or operator assembly, the glazing panel stays and we repair the failed component. If the insulated glass seal is fogged or the panel is cracked, the panel itself must be replaced. Call (562) 262-2907 and we’ll tell you which situation you have before you spend a dollar.
Most flashing and glazing swaps take 2 to 4 hours on a single-story roof with standard access. Curb rebuilds or two-story work with steep pitches can run a full day. We’ll give you the timeline in writing with your quote.
We keep common Mr-Glass-compatible glazing panels, flashing kits, and sealants in stock for the most common curb sizes across Orange County. Special-order OEM panels take two to three weeks. We’ll tell you the honest lead time before any work is scheduled, and we put it in writing.
If your Mr-Glass skylight or sun tunnel is leaking, fogged, or cracked, call (562) 262-2907. We’ll come out, measure it right, and give you a straight number, clear scope, and no surprises at final invoice.
Written by Curtis Lane, Owner, Bradford Remodeling Co – Orange County at Bradford Remodeling Co Orange County, serving Orange County and nearby areas.
