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Mr-Glass Home Additions & ADU: The San Antonio Owner’s Guide
If you have a Mr-Glass home addition or ADU in San Antonio and a part has failed, we can match it, price it, and install it. A full Mr-Glass-compatible home addition or ADU project in San Antonio typically runs $45,000 to $130,000 for the addition itself, while ADU construction runs $90,000 to $220,000 depending on size and site work. Most owners discover a failed part the same way: a door that no longer seals against Texas heat, a window crank that stripped mid-July, or a threshold that lets in the kind of driving rain we get along Loop 410 in the spring.
This page covers what we see in the field, what the parts actually cost, and how to know whether it is a straightforward swap or something that needs a wider look. We are an independent San Antonio contractor, not affiliated with Mr-Glass, but we work on their additions and ADUs regularly and stock the parts that fail most often.
Which Mr-Glass Models This Applies To
Mr-Glass home additions and ADU builds vary more by the year they were constructed than by a tight series of model numbers. We have worked on units built as far back as the early 2000s around San Antonio and as recently as last year in newer subdivisions near Alamo Ranch. The compatibility gotcha to know: Mr-Glass used a specific 5/8-inch jamb depth on sliding door assemblies through roughly 2016, then moved to a 3/4-inch standard. A replacement roller or weatherstrip off a big-box shelf will bind on the older units even when it looks identical in the package. That single spec mismatch is the most common reason a homeowner buys a part twice.
When we walk a job, we look for the small aluminum tag on the fixed panel or the hinge side of the door. It lists the unit number and the glass package code, which tells us the exact seal and weatherstrip profile to order. For Mr-Glass specifically, OEM parts are still available for most assemblies, but on door rollers and window balances we often recommend a quality aftermarket equivalent that outlasts the original by several San Antonio summers. We carry the common profiles on the truck and order the rest same week.
Styles & brands we work with
Signs Your Mr-Glass Home Additions & ADU Is Failing
- Condensation between the glass panes. The seal has failed and the argon or krypton fill has escaped. In San Antonio humidity, this gets worse fast, and the glass cannot be wiped clean from either side. The panel needs replacement or a glass-only swap.
- The sliding door drags or sticks halfway. This is usually a roller assembly that has flattened from years of sun exposure and grit. Running it further grinds the track and doubles the eventual repair cost.
- Air you can feel around a closed door or window frame. The weatherstrip has compressed beyond recovery. Your HVAC runs more, and the July electric bill shows it. This is the cheapest fix we do and the one owners put off longest.
- The window crank spins without moving the sash. The internal gear stripped, which happens often on the smaller casement windows used in Mr-Glass ADUs. It is a quick replacement with the right part; the wrong part means drilling new holes.
- The door lock or handle will not engage cleanly. The frame has shifted, usually from clay soil movement. San Antonio’s expansive clay shrinks in drought and swells after rain, and aluminum-frame additions feel it before the house does. The fix may be handle alignment, or it may mean re-shimming the frame.
See the difference
Before
After
Before
After
Before
AfterReplacement Cost & What’s Included
A single replacement part on a Mr-Glass home addition or ADU in San Antonio is typically $150 to $700 installed, including the part and our labor. A full sliding door assembly replacement lands in the $1,800 to $4,500 range. A whole-addition or whole-ADU renovation, where you are replacing most of the glazing and frames, runs $45,000 to $130,000 for a home addition, and $90,000 to $220,000 for an ADU build-out.
What drives the cost
- Glass package. Low-E and tinted packages cost more than clear glass, but in San Antonio the tinted package pays for itself in cooling savings.
- Frame condition. If the aluminum frame itself is sound, we replace the part and move on. If the frame is pitted or bowed, the whole assembly changes.
- Access. Second-story ADU windows take more time to work safely than a ground-floor door.
- Part availability. OEM Mr-Glass parts for older units sometimes need to be ordered. We tell you the timeline before we start.
Every quote is a written price before any work begins. That is how Elmstead Remodeling San Antonio runs every job, and Graham Stein will not start a job without it. The crew brings drop cloths for the interior floors and shoe covers at the door, same as any remodel we do. When the work is done, we send a photo of the clean-up before we leave. If the part fails within 365 days, we make it right.
Key Takeaways:
- Most Mr-Glass part replacements in San Antonio cost $150 to $700 installed.
- Older units need 5/8-inch components; newer units use 3/4-inch. Getting this wrong wastes money.
- We stock the common rollers, weatherstrip, balances, and seals on the truck.
- Full addition or ADU renovations run $45,000 to $220,000 depending on scope.
DIY or Call Us?
You can safely clean the track, check for obvious screw loosening on the handle, and note where the air leak is coming from. That is genuinely useful information when we talk. What we advise against is prying a slider panel off its track by hand. A Mr-Glass slider panel weighs more than it looks, and when it tips, it damages the frame, the glass, or the person holding it. We have replaced enough bent tracks to say that plainly. High-tension window balances also store real energy and can snap back hard if released wrong.
If the part is a simple handle or weatherstrip on an accessible door, a careful owner can do it with the right matched part. If it involves glass, rollers, balances, or a frame that is out of square, call (432) 233-0976 and we will come look. The estimate is free.
FAQs
Weatherstrip and rollers in San Antonio typically last 8 to 12 years, but units on the west side of the house or with full afternoon sun can need new parts in as few as 5. Glass seal failures depend on exposure; we see earlier failures on additions with no shade structure. Call (432) 233-0976 and we can tell you what to expect for your specific wall orientation.
Rollers, balances, and crank mechanisms are almost always replaced rather than repaired, because the worn internal parts are not serviceable. Weatherstrip is always a replacement item. The one exception is a handle set where a single stripped screw hole can be re-tapped in place. For anything else, replacement is the honest answer and the cheaper long-term one.
A single roller or weatherstrip replacement on a Mr-Glass door usually takes under two hours on site. A full panel replacement runs half a day. If we need to order an OEM part for an older unit, we will tell you the timeline on the written quote before any work is scheduled.
Yes. We carry the common roller profiles, weatherstrip shapes, window balances, and crank mechanisms that fit most Mr-Glass additions and ADUs in the San Antonio area. If your unit needs an uncommon OEM-only part, we order it and schedule the install once it arrives, with the full price written down before we start.
If your Mr-Glass addition or ADU part has failed and you want it matched correctly the first time, call (432) 233-0976 for a free estimate. We also stock and install parts for KraftMaid cabinetry, Cambria countertops, and Silestone surfaces, so a single call often covers everything the project touches. Write it down, price it once, do it right.
Written by Graham Stein, Owner, Elmstead Remodeling San Antonio at Elmstead Remodeling San Antonio, serving San Antonio and nearby areas.
