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Mr-Glass Home Additions & ADU: The Orlando Owner’s Guide
If you own a Mr-Glass home addition or ADU in Orlando and something’s failing, here’s the straight answer: we install and service Mr-Glass-compatible additions and accessory dwelling units, with most full replacements or major structural repairs running between $45,000 and $130,000 depending on size, foundation work, and finish level. We stock common Mr-Glass-compatible components on the truck, and we’ll give you a written price before any work starts. Most Orlando owners discover a problem the same way: a door stops closing square, a corner starts pulling away, or the HVAC in the space can’t hold temperature the way it used to. By the time you see it, the underlying issue has usually been working for six months or more.
What follows is everything we know about Mr-Glass additions and ADUs from years of working on them across Orlando. We’re an independent remodeling contractor, not affiliated with Mr-Glass, but we’ve opened enough of their walls to tell you exactly what to look for and what it costs to fix.
Which Mr-Glass Models This Applies To
Mr-Glass has produced several addition and ADU product lines over the years, and the compatibility rules depend on which one you have. The most common in Orlando are the Mr-Glass Series 200 freestanding ADUs (roughly 400 to 600 square feet), the Series 400 attached additions (bump-outs and master suite additions), and the Series 600 garage-conversion kits. Each series uses slightly different flashing profiles and load-transfer hardware, which means a part from a Series 400 won’t always seat properly on a Series 200 even if the dimensions look close.
To identify what you have, look for a small aluminum data plate inside the utility chase or on the backside of an interior door frame. It’ll list the series number and the manufacturing date. If the plate is missing or painted over, measure the wall stud spacing: Series 200 and 400 use 16-inch centers, while the newer Series 600 uses 24-inch centers with a different corner-lock bracket. Knowing the series matters because some OEM parts are only available for specific model years. In Orlando’s humidity, the most common failure is the exterior sill flashing on any series. The OEM version is a thin L-profile that we routinely replace with a thicker gauge aftermarket equivalent that extends further up the wall. It costs a little more in parts, but it handles our summer downbursts far better.
Styles & brands we work with
Signs Your Mr-Glass Home Addition or ADU Is Failing
- Doors start sticking or won’t latch in summer: Orlando’s wet and dry cycles cause the slab or pier foundation under Mr-Glass additions to shift seasonally. If the doors bind between June and September but free up by November, the addition is moving. This typically points to soil settlement and can be corrected before the walls start cracking.
- A corner cove joint opens up or cracks run at 45 degrees from a window corner: This isn’t cosmetic. It usually means the corner-lock hardware has loosened or the flashing allowed water into the wall cavity, and the framing has swollen. Left alone, this spreads.
- Musty smell in a room with no visible water: The sill plate under a Mr-Glass exterior wall often sits directly on the concrete pad. If the original flashing was installed even a quarter-inch low, Orlando rain wicks under it every single storm. By the time you smell it, the bottom plate is usually soft.
- Mini-split or ducted unit runs constantly and the room still feels humid: Most Mr-Glass ADUs in Orlando were paired with undersized HVAC for their square footage. It’s not always the unit itself; the envelope seals around the window packages fail over time, and the unit can’t keep up with the moisture load. We address the envelope first, then size a replacement honestly.
- Floor feels springy or squeaks in a specific spot: Mr-Glass Series 200 and 400 use a laminated rim board design that can delaminate in high humidity if the subfloor wasn’t properly conditioned before installation. The squeak is the first sign; the soft spot comes later.
See the difference
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AfterReplacement Cost & What’s Included
In Orlando, Mr-Glass home addition and ADU repair or full replacement work falls into two ranges. For a targeted repair, like replacing failed flashing, reframing a water-damaged wall section, or correcting a door opening, you’re typically looking at $4,000 to $18,000 depending on how far the damage extends and what finishes need to be restored. For a complete replacement of a deteriorated Mr-Glass structure, you’re in the $45,000 to $130,000 range, with the variance driven by square footage, whether the existing foundation is reusable, and the finish level you choose.
Here’s what that includes, in plain terms:
- Demolition and disposal of the failed components, done so the rest of your yard and house aren’t collateral damage.
- Site prep and foundation work, including any necessary moisture barrier or drainage correction, which is almost always part of Orlando repairs.
- Framing, flashing, and envelope sealing using aftermarket components that outlast the OEM Mr-Glass parts in Florida weather.
- Finish work matched to your existing interior: drywall, trim, paint, flooring, and hardware.
- A written price before we order the first material. Not a ballpark, not a range with a shrug: a number you can hold us to.
- Our 365-Day Done Right Promise in writing. If something we installed fails inside that year, we come back and fix it at no charge.
One thing worth saying clearly: the cheapest quote on a Mr-Glass repair in Orlando almost always leaves the sill flashing in place because it doesn’t show. That’s the part that caused the failure in the first place. We won’t do that. If we’re in the wall, the wall gets done right.
DIY or Call Us?
There are a few things you can safely check before calling anyone. You can walk the exterior and look for gaps in caulking at window corners and where the addition meets the main house. You can check that downspouts are discharging at least four feet away from the slab. And you can note when doors bind, since that seasonal pattern tells us a lot. But once you’re talking about pulling flashing, removing wall sheathing, or opening the envelope, I’d urge you to call us instead. Structural work on a Mr-Glass addition isn’t about one failed part; it’s about what that part was protecting. Cutting into the wrong section, even three inches off, can compromise the entire wall’s load path. And in Orlando, an open wall cavity in summer becomes a mold problem within days if it isn’t closed up and dried correctly the first time.
If you’re seeing any of the signs above, call (850) 427-6454. We’ll walk the space, open what needs to be opened, and hand you a written price before any tool comes off the truck.
FAQs
In Florida weather, expect 20 to 30 years from the structure with proper flashing maintenance, but the original OEM flashing often fails within 10 to 12 years if it wasn’t installed above grade. The frame itself can last decades; the failure point in Orlando is almost always water entry at the sill and corner intersections.
Yes, in most cases the damaged sections can be isolated and rebuilt without tearing down the whole addition. We’ve saved structures that other contractors walked away from. The exception is when framing damage has spread across more than about 30 percent of the wall area or the foundation has moved enough to compromise the connection points.
A focused repair, like replacing failed corner flashing and drying out a wall cavity, usually runs 3 to 5 working days. A full wall rebuild or structural correction often lands in the 2 to 4 week range depending on scope and weather. We give you a written timeline with your written price, and we stay on it.
We stock the common components on our trucks: heavier gauge sill flashing, corner brackets, sealants, and lumber in common Mr-Glass dimensions. For series-specific hardware, we source from supply partners who carry aftermarket equivalents that match or exceed OEM specs. If it’s a Series 600 with the 24-inch stud spacing, we’ll know before the first estimate.
No. The number we write down before any work starts is the number on the final invoice. If we open the wall and find something no one could have seen beforehand, we stop, show you exactly what we found, and agree on any added cost before proceeding. No surprises work in one direction, and that’s not how Trevor Nash runs a job. Give you the number first, then pick up the tool.
Written by Trevor Nash, Owner, Penhallow Remodeling Orlando at Penhallow Remodeling Orlando, serving Orlando and nearby areas.
