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Mr-Glass Home Additions & ADU: The Jacksonville Owner’s Guide
Mr-Glass home additions and ADU projects in Jacksonville typically run $45,000 to $130,000 installed, depending on square footage, foundation work, and finish level. We stock and install Mr-Glass-compatible components for these builds, and we can usually have a crew on site within a week of the written estimate. Most owners reach this page because something in an existing addition or ADU has failed: a tie-in point at the roofline, a substrate separation at the wall junction, or glass panel sealing that’s given up after a few Jacksonville summers.
Here’s the reality: a home addition or ADU is not a single part. It’s a system. Glass walls, structural headers, weather barriers, and the connection where new framing meets old framing all have to work together. When one piece fails, the whole envelope starts letting Florida humidity in. That’s what we fix.
Which Mr-Glass Models This Applies To
Mr-Glass home addition and ADU components come in two primary series: the Straight-Line series, which uses fixed glass panels with minimal framing, and the Post-and-Beam series, built around structural aluminum posts that carry roof load at wider spans. The Post-and-Beam models are more common in Jacksonville ADUs because they handle Florida’s wind load requirements at larger openings without a steel beam added above the glass.
The compatibility gotcha most owners run into: Mr-Glass panel dimensions are matched to the series, not interchangeable across them. A 96-inch panel from a Straight-Line kit will not seat correctly in a Post-and-Beam frame, even if the width matches. The difference is the edge channel depth: Straight-Line panels ride in a 1-3/4-inch channel, Post-and-Beam uses a 2-1/4-inch channel. You can confirm what you have by measuring the metal channel the glass sits in, or checking the sticker on the bottom corner of any panel. It’ll say “SL” or “PB” followed by the production year.
For OEM parts versus aftermarket: Mr-Glass factory panels and seals are still available through us, but for glass replacement specifically we often recommend a quality aftermarket laminated panel cut to the same spec. Same thickness, same tint, same tempering, usually $200 to $400 less per panel. When we quote an addition or ADU repair in Jacksonville, we show both options on the written estimate and let you decide. No surprises at the door.
Styles & brands we work with
Signs Your Mr-Glass Home Addition or ADU Is Failing
- Condensation trapped between the glass panes. The seal around the insulated glass unit has blown. Once the desiccant inside the spacer is saturated, you can’t dry it out. The panel needs replacement, not cleaning.
- Drafts along the floor where the addition meets the original house. This is usually the sill plate or transition flashing. Jacksonville’s wet-dry cycle pushes moisture into that seam every summer, and it eventually wicks up into the framing. You’ll feel the air movement before you see the damage.
- Sticking or sagging door panels on an ADU glass wall. The aluminum frame has shifted, or the threshold has settled. On crawlspace ADUs this is common within a few years. Shim it early and it’s a one-hour fix. Wait until the glass binds and you’re replacing a panel.
- Water staining on the interior ceiling near the glass wall junction. The head flashing or the roof tie-in has a gap. Jacksonville gets 50-plus inches of rain a year. A quarter-inch opening will move a lot of water over one summer.
- Silicone sealant at the panel corners pulling away, yellowing, or cracking. That’s UV and heat exposure. It’s also the first place leaks start. We scrape and re-seal with a commercial-grade sealant rated for structural glazing, not the $7 tube from the hardware store.
See the difference
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AfterReplacement Cost & What’s Included
For a typical Mr-Glass home addition or ADU component repair in Jacksonville, the installed price range is $4,500 to $12,000 when we’re addressing a specific failure: one to three glass panels, new seals, flashing correction, and substrate repair where needed. When the whole addition shell is compromised, the cost moves into the full lead range of $45,000 to $130,000 because we’re rebuilding the envelope, not patching it.
What drives the range: how many panels, whether the framing is salvageable, whether we need to open the ceiling or floor to repair the substrate, and which finish level the original build used. Every estimate is a written, line-item price. If existing framing is rotted, we show you the damage before replacing a stick of lumber. The work, and the price, are in writing before we start. The 365-Day Done Right Promise applies to every repair and full addition we complete: if it fails inside a year, we come back and correct it at no charge.
DIY or Call Us?
What you can safely check yourself: visible sealant condition, whether weep holes at the bottom track are clogged with Jacksonville pollen and dirt, and whether the drain channels along the threshold are clear. Those three things are worth a look twice a year. If the water’s not draining, the fix is often just a cleaning.
What you should not touch: any panel with live tension, any structural header, any tie-in where the addition roof meets the main house, and any repair that involves removing glass. A 96-inch laminated panel weighs 80 to 110 pounds and has sharp edges under load. Getting it wrong means a dropped panel, bad cuts, or worse. We carry the right suction cups, gloves, and edge protection on every truck. If you’re looking at a failed seal, a shifted frame, or water where it shouldn’t be, call (904) 337-5929 and we’ll get eyes on it. Estimates are free and written.
Frequently Asked Questions
Expect 15 to 20 years from the insulated glass itself and about 10 to 12 years from the perimeter seals before Jacksonville’s heat and humidity force a re-seal or panel replacement. We also regularly service Mr-Glass compatible components alongside other brands our crews work with, including KraftMaid, Cambria, and Silestone, when an addition includes cabinetry or surface work.
No. Once the edge seal on an insulated panel fails, the glass unit is done. Cracked or chipped panels can’t be structurally repaired either. Surface scratches can sometimes be polished if shallow, but any panel with edge damage or a failed seal gets replaced. Call (904) 337-5929 and we’ll tell you which situation you have.
A single-panel replacement or re-seal job is usually completed in one day. A structural repair involving framing, flashing, and substrate replacement runs three to five days. A full home addition or ADU build ranges from eight to sixteen weeks depending on scope and the permit office. We’ll give you a written schedule with the estimate.
We keep the common failure items on hand: sealant, flashing, thresholds, setting blocks, and standard panel dimensions for the Straight-Line and Post-and-Beam series. Non-standard panels are ordered per job and typically arrive within seven to ten business days. For an exact price and timeline, call (904) 337-5929 and we’ll walk the job with you before any work begins.
Written by Curtis Lane, Owner, Bradford Remodeling Co Jacksonville at Bradford Remodeling Co Jacksonville, serving Jacksonville and nearby areas.
