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Mr-Glass Home Additions & ADU: The Los Angeles Owner’s Guide
If your Mr-Glass home addition or ADU has a failing component, we stock the replacement parts most Los Angeles owners need and install them for a typical total of $53,100 – $153,400 depending on scope, structural condition, and the specific Mr-Glass series you have. Most owners discover the problem the way you just did: a door that no longer seats in its frame, a seam that has opened where the addition meets the original house, or a window in the ADU that suddenly takes two hands to open. You need to know whether the part is still supported, what a real fix costs, and whether anyone in Los Angeles actually keeps these components on a truck. That’s this page.
Key takeaways:
- We stock common Mr-Glass-compatible structural connectors, flashing kits, and threshold assemblies on the truck; uncommon series-specific hardware is usually sourced within three to five business days.
- Installed replacement work in Los Angeles runs $53,100 – $153,400 depending on how much of the original opening, framing, or finish has to be addressed.
- Every job gets a written price before work starts and a written guarantee when it’s done. That’s the Kingswell standard, and we’ve worked under it since 2004.
Which Mr-Glass Models This Applies To
Mr-Glass produced home addition and ADU components across several series lines over the years, and the compatibility question is where Los Angeles owners get burned. A threshold assembly from the early 2000s MG-06 series will not seat correctly in a mid-2010s MG-12 opening, even when the rough width measures the same. The difference is in the extrusion profile, and that’s the kind of thing you can’t see under paint and caulk. We photograph the label or stamp on the failed part, measure the actual rough opening, and match the replacement to the series before ordering. If the label is gone, the extrusion profile and the notching pattern usually tell us what we need.
This gets decided fast: OEM Mr-Glass parts are the right call when the component is load-path critical or when the finish has to match across visible surfaces. For interior hardware, well-machined aftermarket equivalents from trade suppliers often cost less and outlast the original. We’ll tell you which makes sense for your specific part and why, because you should never pay OEM money for a part that doesn’t need to say Mr-Glass on it. We also stock parts for adjacent brands like KraftMaid cabinetry, Cambria and Silestone countertops, since addition and ADU work frequently touches those surfaces at the transition points.
Styles & brands we work with
Signs Your Mr-Glass Home Addition & ADU Is Failing
If you’re reading this page, you’ve probably noticed something, and the list below matches what we see on service calls across Los Angeles, from the Valley to South LA to the Eastside. Here’s what typically shows up first:
- The addition door sticks at the top corner in summer but swings free in winter. Los Angeles temperature swings plus the expansion and contraction of the frame means the original Mr-Glass header connector has shifted, or the opening was never properly flashed at the transition.
- A visible crack runs along the seam where the addition meets the original structure. That seam is the most stressed joint on any home addition or ADU in Los Angeles, especially after a few seismic events. The original Mr-Glass tie-in hardware is often under-specified for what the code requires now.
- Water stains appear at the base of the ADU walls after heavy rain. The flashing detail at the foundation line has failed or was never installed to Mr-Glass spec, and in a Los Angeles winter that means slow rot behind the wall finish.
- The French door or multi-slide won’t close fully or the handle no longer throws the bolt. The Mr-Glass threshold assembly has settled or cracked, and the door has dropped enough that the hardware no longer aligns.
- You hear a rhythmic creak or pop when the wind picks up or during temperature changes. That’s the sound of a structural connector losing its purchase or a flange that’s working loose against the substrate.
None of these fix themselves. Some of them get more expensive every month they’re ignored, especially the water-related ones. If you’re anywhere in Los Angeles and seeing one of these, the next move is to figure out what it costs to put it right. That’s a phone call and a look at the opening, not a guess.
Replacement Cost & What’s Included
So here’s the real answer, the number you can’t get from a generic search: replacing a failing Mr-Glass component on a Los Angeles home addition or ADU runs $53,100 – $153,400 installed. That spread exists because the low end covers a straightforward threshold or flashing replacement where the framing and finish are still sound, and the high end covers the opposite: a load-path failure where we have to open the wall, replace the connector, correct the framing, and re-flash the transition seam to current Los Angeles code. The part itself is almost never the expensive line item. The labor to access it, correct what’s behind it, and make the repair invisible is what drives the number.
What’s included on our end: the part (OEM or aftermarket, whichever your situation actually needs), the labor, any required structural correction, flashing and sealant, cleanup, and a written guarantee on the work. The Kingswell standard applies: you get a written price before any work begins, a real arrival window, and a 365-day promise that if it’s not done right, we make it right at no charge. And if the repair fails inside the guarantee period, the return visit is free, no service fee and no argument. Trevor Nash has been around Los Angeles long enough to know that a guarantee means nothing unless it’s written down.
See the difference
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AfterDIY or Call Us?
Let’s be honest about what you can do in the driveway and what you shouldn’t. You can photograph the failed component, find the label or stamp, measure the rough opening, and write down when the problem started and under what conditions it gets worse. That information saves a service visit and helps us get the right part the first time. What you shouldn’t do is attempt to remove a structural connector or re-flash a transition seam yourself, because that’s not a homeowner repair, it’s a structural repair. If the piece in question is part of a load path, and most of the Mr-Glass components we replace are, doing it wrong doesn’t just fail, it fails while it’s holding weight. There’s a reason we carry the license and the insurance.
That said, we don’t charge to look. Call us at (213) 277-6578, describe what you’re seeing, and we’ll tell you whether it’s worth a service visit or whether you can watch it for now. Give you a number first, then pick up the tools.
FAQs
In Los Angeles, you can expect structurally loaded Mr-Glass components to last 15 to 25 years before either the metal fatigues or the surrounding framing moves enough to compromise the connection. Coastal areas like Playa del Rey or San Pedro shorten that lifespan significantly because the salt air accelerates corrosion on the fasteners, even when the visible part looks fine.
Some can, and some honestly cannot. A threshold that has settled can often be shimmed and re-anchored. A cracked structural connector should not be welded or patched, it should be replaced, because the repair introduces heat stress at exactly the point where the original metal already failed. We’ll tell you which one you have and why.
A straightforward threshold or flashing replacement on a Los Angeles home addition or ADU typically takes one day from arrival to cleanup. A structural repair that requires opening the wall, correcting framing, and re-finishing can take three to five days depending on the finish work. You’ll know before we start.
We stock the most common Mr-Glass-compatible connectors, threshold assemblies, and flashing kits on the truck. Series-specific parts are sourced from our Los Angeles suppliers, usually within three to five business days. Call us at (213) 277-6578 and we’ll tell you whether yours is in the truck or on order.
Contact
If your Mr-Glass home addition or ADU is showing any of the signs above, the fastest way to get a real answer is to call us at (213) 277-6578. You’ll get a free estimate and an honest read on what the part costs, what the labor costs, and what the fix will take. Written price before any work starts, written guarantee after. That’s how we do business in Los Angeles.
Written by Trevor Nash, Owner, Penhallow Remodeling Los Angeles at Penhallow Remodeling Los Angeles, serving Los Angeles and nearby areas.
