Free written scope consultation - allowances, timeline, and change-order rules on paper before a single trade is scheduled
Mr-Glass Home Additions & ADU: The Miami Owner’s Guide
We stock and install Mr-Glass-compatible components for home additions and ADU projects in Miami, with installed pricing for ADU construction running $106,200-$259,600 and standard home additions at $53,100-$153,400 depending on foundation type and tie-in complexity. Most Miami homeowners discover an issue when the glass envelope of their Mr-Glass addition shows seal failure after a tropical weather event, or when thermal expansion gaps that were correct at installation have compressed after years of 90-degree heat cycles. We carry the glazing gaskets, aluminum extrusion splices, and weep screed assemblies specific to Mr-Glass’s frame system on our trucks, and we can typically inspect and quote within 48 hours.
Which Mr-Glass Models This Applies To
Mr-Glass has produced three distinct framing systems for residential additions since the mid-2000s: the 400 Series thermal-break aluminum, the 500 Series structural silicone-glazed curtain wall, and the newer 600 Series hybrid that incorporates composite thermal breaks. The 400 Series uses a 2.5-inch nominal frame depth with a single-stage weep; the 500 Series jumps to 4.5 inches and requires a two-part silicone backup seal. The 600 Series accepts either.
To identify your system, check the etched mark on the interior face of the vertical mullion - it reads “MG-4XX,” “MG-5XX,” or “MG-6XX” followed by the date code. The gaskets are not cross-compatible: the 400 Series uses a simple push-in wedge gasket in EPDM, while the 500 and 600 Series use a co-extruded dual-durometer bulb-and-wedge that must be ordered by the linear foot with corner molds factory-welded. We stock both OEM Mr-Glass gaskets and a quality aftermarket equivalent from Tremco that matches the Shore A hardness and UV stabilizer package; for Miami’s UV index, we generally recommend the Tremco equivalent for any repair expected to last beyond seven years, as the OEM formulation can stiffen prematurely in South Florida exposure.
Rowan Construction Group Miami is an independent service provider - not affiliated with Mr-Glass - and we source parts through three verified distributors to avoid the OEM markup when an equivalent meets the spec.
Styles & brands we work with
Signs Your Mr-Glass Home Additions & ADU Is Failing
- Condensation between glass lites that does not clear by midday. This indicates seal failure in the insulated glass unit, or IGU - the hermetic edge seal has breached and moist Miami air has entered the cavity. Once the desiccant saturates, the view stays fogged permanently and the thermal performance drops to that of single-pane glass.
- Water staining at the interior sill or baseboard after moderate rain. The weep screed - the slotted drainage channel at the frame base - may be clogged with organic debris, or the sill pan flashing was omitted or reversed during original installation. In Miami, we see this most often on additions where the original contractor set the frame directly on the slab without a raised sill pan.
- Difficulty operating windows or doors that once moved freely. Thermal expansion of the aluminum frame against a fixed substrate can compress the operating clearance; in Mr-Glass systems, the nylon roller trucks in the 400 Series are particularly prone to flat-spotting under sustained load in heat.
- Visible gasket extrusion or “pinched” rubber at frame corners. The EPDM has exceeded its compression set limit, usually after 8-12 years in Miami’s climate. Once the gasket no longer rebounds, wind-driven rain bypasses the seal and the frame corner becomes the leak path of least resistance.
- Exterior silicone beads that have chalked, cracked, or separated from the substrate. UV degradation of the structural silicone in 500 Series installations is accelerated within three miles of the coast; salt aerosol catalyzes the breakdown. The silicone does not “heal” - it must be removed to sound substrate and re-applied with proper primer.
See the difference
Before
After
Before
After
Before
AfterReplacement Cost & What’s Included
| Component / Service | Miami Price Range |
|---|---|
| IGU replacement (per unit, 400 Series) | $945-$2,950 |
| Full sash replacement with frame (500 Series) | $3,540-$10,030 |
| Weep screed / sill pan rebuild | $1,180-$3,540 |
| Gasket replacement (full perimeter, EPDM) | $710-$2,125 |
| Structural silicone removal and re-glaze | $2,360-$7,670 |
| Complete Mr-Glass addition re-skin | $53,100-$153,400 |
The range reflects three variables: whether the substrate is wood frame or concrete block, whether the original installation included proper sill pan and head flashing, and whether the IGU size requires custom fabrication or matches a stock lite. Every quote we write itemizes parts, labor, and permit fees separately - no lump-sum mystery. Under Clause 1 of The Haven Standard, that written price is fixed; if we encounter concealed rot or termite damage, we stop work, photograph the condition, and write a signed change order before proceeding. Since 2007, this discipline has kept our projects within a few percent of the original agreed number across 4,000-plus jobs. The 365-Day Done Right Promise covers all Mr-Glass repair and replacement work.
DIY or Call Us?
An owner can safely inspect for the symptoms above: run a hose at the frame perimeter for ten minutes and check the interior sill, or hold a lit incense stick near the closed sash on a breezy day to trace air infiltration. What you find is useful information to relay when you call.
What we do not recommend: removing an IGU without proper suction cups and frame spreaders, cutting old structural silicone with a razor alone, or attempting to reset a frame that ties into the primary structure. The 500 Series curtain wall is designed to accommodate live-load deflection; if you disturb the anchor bolts without shoring the header, the frame can rack and the glass can stress-fracture. We have replaced three homeowner-attempted repairs in Miami where the IGU was dropped, the frame was scratched, or the waterproofing membrane was punctured - each cost roughly double what the original professional repair would have run.
We carry Mr-Glass-compatible gaskets, IGU setting blocks, and silicone cartridges on our trucks. Call (786) 321-4970 to schedule your free estimate; we will inspect, photograph the condition, and deliver a written price before any work starts.
FAQs
In Miami’s climate, expect 8-12 years from EPDM gaskets and 10-15 years from silicone structural seals on coastal installations. The UV index and salt exposure within two miles of the water accelerate the low end; inland Palmetto Bay or Pinecrest installations tend toward the longer span. Call (786) 321-4970 for an exact quote - estimates are free.
No. Once the hermetic seal breaches and the desiccant saturates, the IGU cannot be restored to factory performance in the field. Re-sealing attempts with perimeter tape or injectable sealants fail within one to two Miami rainy seasons. We replace the IGU with a new unit fabricated to the original lite size and Low-E specification. Call (786) 321-4970 for an exact quote - estimates are free.
A typical 400 Series addition with 120 linear feet of frame perimeter takes one crew day to remove old gasket, clean the retaining groove, and install new. If the frame corners require re-fabrication or the weep screed needs rebuilding, add a second day. We schedule inspections within 48 hours and stock the material. Call (786) 321-4970 for an exact quote - estimates are free.
We stock EPDM and silicone gaskets in the common Mr-Glass profiles, IGU setting blocks, structural silicone in white and bronze, and aluminum splice sleeves for the 400 and 500 Series. Custom-color anodized extrusions or oversized IGUs require a 10-14 day fabrication lead; we will tell you before we leave the inspection whether your job can be next-day or needs ordering. Call (786) 321-4970 for an exact quote - estimates are free.
We also stock and install parts for KraftMaid cabinet systems, Cambria and Silestone surfacing - the same sourcing discipline applies: OEM or verified equivalent, written spec, written price.
Measure twice, write it down, then build it. That’s how we have run every project since Grant Rowan founded the company in 2007, and it is why we carry a documented photo record out to every customer as standard - not an upgrade, not an afterthought. Grant learned the trade at Los Angeles Trade-Technical College, spent two years in the building construction program before his first job site, and has run crews in South Florida for over a decade from gut renovations in Coconut Grove to new commercial builds across Miami-Dade. He keeps a fishing rod in the truck and considers a slow Saturday morning on Biscayne Bay a reasonable reward for a week that went according to plan.
Ready to get your Mr-Glass addition back to spec? Call (786) 321-4970 to schedule your free estimate. We will inspect, document what we find with photographs, and deliver a written price before any work starts - every time, no exceptions.
Written by Grant Rowan, Owner, Rowan Construction Group Miami at Rowan Construction Group Miami, serving Miami and nearby areas.
