Free written scope consultation - allowances, timeline, and change-order rules on paper before a single trade is scheduled
Before
After
Before
After
Before
AfterMr-Glass Home Additions & ADU: The Los Angeles Owner’s Guide
If your Mr-Glass home addition or ADU has a failed part, we stock and install compatible replacements across Los Angeles, with typical installed pricing running $53,100 to $153,400 depending on scope. Most owners find us the same way: a door that no longer seals, a window that binds, a roofline that leaks at the transition, or drywall that’s started to separate at the seam between the original house and the addition. You’ll usually see it before you hear it.
Here’s what matters: Mr-Glass components are not generic. The framing connections, window flange depths, and roof tie-in details on a Mr-Glass addition follow a specific build sheet, and slapping an off-the-shelf replacement in place of the matched part will work until it doesn’t. We keep the common failure points in stock and know which ones need to be ordered to match your exact model year. Under Clause 1 of The Haven Standard, you’ll get a written price before we start, not after we’re done.
Which Mr-Glass Models This Applies To
Mr-Glass home additions and ADUs were built in several series across the last two decades, and the replacement part you need depends on which series you have. The easiest identifier is the manufacturer’s label on the inside of the door jamb or on the sill plate at the corner where the addition meets the main structure. That label carries a build code; the first two digits tell us the series, the last four tell us the production run. If the label is gone, we measure the reveal dimensions at the windows and the depth of the roof overhang, which narrows the series quickly.
Here’s the compatibility gotcha that trips people up. The Mr-Glass Series 2 and Series 3 additions look nearly identical from the outside, but the window flange depth differs by 3/8 inch and the roof tie-in bracket is not interchangeable between the two. If a Series 2 window is swapped with a Series 3 unit, the trim sits proud and water finds the gap within a year or two in Los Angeles rain seasons. We match parts to the series, not to “close enough.”
On the OEM versus aftermarket question: Mr-Glass OEM parts are still available for most Series 2 and all Series 3 units, but lead times from the manufacturer can run 3 to 6 weeks. Quality aftermarket equivalents from suppliers we’ve vetted across fifty-plus brands cut that to days, not weeks, and we’ll show you the spec sheet side by side before you sign anything. The decision is yours; the documentation is ours.
We also stock compatible components for other brands in the same category, including KraftMaid, Cambria, and Silestone, so if your addition mixes manufacturers, we can match the full assembly.
Signs Your Mr-Glass Home Additions & ADU Is Failing
- Drywall cracks at the addition seam. This is the most common first sign, and it usually means the addition has settled or moved slightly relative to the main house. In Los Angeles, the clay-heavy soil in neighborhoods like Los Feliz and Eagle Rock expands and contracts with moisture, and that movement concentrates stress exactly where the two structures tie in. The fix is often a connector replacement, not a drywall patch.
- Sticking or leaking windows. When the window flange deforms or the rough opening shifts, the sash binds, and water starts creeping in around the jamb. On Mr-Glass additions, this often traces back to a failed seal at the head flashing, not the window itself.
- Roof leak at the tie-in line. The roof-to-wall transition on an addition is a high-fail point because two different roof planes meet there. If you’re seeing water stains on the ceiling of the addition, the likely culprit is a cracked or separated transition flashing that’s specific to your Mr-Glass series.
- Doors that won’t latch or drag on the threshold. When the addition framing moves even a quarter inch, doors are the first casualty. A door that latched fine in summer and drags in winter is reporting movement, not worn hinges.
- Visible separation at exterior trim corners. If the trim at the outside corner of the addition is pulling away from the wall, you’re past the “watch it” stage. This is a structural fastener or corner bracket failure and should be addressed before rain gets behind the siding.
BeforeAfterReplacement Cost & What’s Included
For Los Angeles, a Mr-Glass home addition or ADU part replacement typically runs $53,100 to $153,400 installed, with the range driven by what failed and how far the component’s influence reaches. A single failed window flange assembly with matching trim and flashing sits at the lower end. A failed roof tie-in that has allowed water damage into the framing sits at the upper end because you’re now doing structural repair, not just part replacement.
Every quote includes the part, the labor, the disposal of the old component, and the documented photo record of what was found and what was done. That photo record is standard on every Rowan Construction Group visit, not an add-on. The written warranty is part of the flat price. No change proceeds without a signed change order, which is the discipline that has kept our projects within a few percent of the agreed cost across more than 4,000 jobs since 2007.
If you have a competitor’s written estimate, bring it. We’ll review it line by line at no charge under our Free Second Opinion offer, and we’ll tell you honestly whether our number is better, worse, or the same, and why.
DIY or Call Us?
There are things an owner can check safely, and things that go wrong fast. You can inspect the drywall seams, check if windows are binding at a specific corner, and look for daylight or water stains at the roof tie-in from the ground. Document what you find with your phone; that’s useful information.
What you should not touch: any part replacement that involves structural connectors, roof flashing at height, or window removal. A failed roof tie-in on an addition is a structural issue, not a hardware-store job. Working at roof height without the right fall protection, or resealing flashing incorrectly, turns a $4,000 repair into a $30,000 water damage problem. If the part you’re replacing holds weight or keeps water out, call us at (470) 298-9650 and let a background-checked crew handle it.
Measure twice, say it once, show your work. That’s the way we quote, and the way we’d want a quote if it were our house.
FAQs
Most Mr-Glass addition components are designed for a 20 to 30 year service life, but Los Angeles conditions shorten that. UV exposure breaks down exterior seals faster than in coastal or shaded climates, and the clay soil movement we get in areas like Silver Lake and Highland Park puts repeated stress on structural connectors. We see failures in the 10 to 15 year range on parts that would last longer in more stable climates. Call (470) 298-9650 and we’ll assess what you’ve got.
Sometimes, yes. Window seals, minor trim separation, and non-structural flashing issues can often be repaired rather than replaced, and we’ll tell you plainly which applies to your situation. But structural connectors and roof tie-in components are replace-not-repair items; once those fail, patching them is a temporary bandage on a load path problem. We’ll write the recommendation in the quote, so you can see the reasoning in black and white.
For a straightforward part replacement like a window flange assembly or a door connector, the work is done same day once the part is in hand. For a roof tie-in repair with water damage remediation, expect 3 to 5 working days on site, with the timeline laid out in the written scope before we start. We don’t start the clock until the part is physically on the job site.
We stock the common failure-point parts for Mr-Glass Series 2 and Series 3 on our trucks: transition flashing, corner brackets, door and window connectors, and seal kits. For less common parts, we order from our vetted supply network with typical lead times of a few days rather than the several weeks OEM sometimes takes. We’ll tell you at the first visit exactly what’s on hand and what has to come in, and the written quote reflects that timeline.
Get Your Written Price
If you’re looking at a failed Mr-Glass addition or ADU part in Los Angeles, don’t guess at the scope. Call (470) 298-9650 and we’ll schedule an assessment, write the price, and hand you the documentation before anyone picks up a tool. The 365-Day Done Right Promise applies to every job we do: if it’s not done right, we make it right. That guarantee is printed on every page, not hidden in an asterisk.
Written by Grant Rowan, Owner, Rowan Construction Group at Rowan Construction Group, serving Los Angeles and nearby areas.