Mr-Glass Window Replacement Nationwide | Sightline Windows & Doors Kendall

Mr-Glass Window Replacement: The Kendall Owner’s Guide

Mr-Glass window replacement in Kendall typically runs $340 to $780 per opening installed, depending on frame size, impact rating, and whether the existing subframe is salvageable. We stock Mr-Glass-compatible frames, sashes, and glazing assemblies for same-day replacement on most residential series found in Kendall homes built between 2015 and 2022. Most owners discover the failure when a window won’t stay open, won’t lock, or shows visible moisture between the panes after a storm - symptoms that worsen quickly in South Florida’s salt-air and UV exposure.

Call (786) 321-3319

Which Mr-Glass Models This Applies To

Mr-Glass manufactures three residential lines common in Kendall: the MG-100 non-impact vinyl series, the MG-3000 impact-rated aluminum line, and the MG-5000 thermally broken aluminum series used in newer construction near Dadeland and the Hammocks. The model number is stamped on the spacer bar between glass panes, visible when you open the sash and look at the top edge of the frame. If the label’s worn, measure the daylight opening width and height to the nearest 1/8 inch, and note the frame depth - 2-5/8 inch for MG-100, 3-1/4 inch for MG-3000 and MG-5000.

We carry OEM Mr-Glass sashes and frames, and where lead times stretch past two weeks, we source aftermarket equivalents from CWS and ES Windows that match the original U-factor and SHGC ratings. The compatibility gotcha: MG-3000 and MG-5000 frames look identical from the street, but the glazing bead profile differs by 3/16 inch. Swapping the wrong bead cracks the glass on installation. We verify this during our measured survey, which you keep.

Sightline Windows & Doors Kendall is independently owned and operated and is not affiliated with Mr-Glass. We service their products because we specified and installed them on hundreds of Kendall openings since 2015.

Signs Your Mr-Glass Window Replacement Is Failing

• Sash won’t stay open or slams shut. The coil balance or block-and-tackle mechanism has lost tension. In Kendall’s humidity, the spring steel corrodes faster than inland ratings suggest - we typically see this at 6 to 9 years, not the 15-year manufacturer spec.
• Visible moisture or fog between glass panes. The insulating glass unit (IGU) seal has failed. Once argon or air escapes, the desiccant saturates and condensation becomes permanent. South Florida’s thermal cycling - 90-degree days, 70-degree nights - accelerates this.
• Frame corner separation or vinyl warping. Heat buildup in dark-colored frames, common on west-facing Kendall townhomes, exceeds the vinyl’s design temperature. The frame distorts, the sash binds, and the weatherstrip gap grows.
• Lock won’t engage or feels loose. The keeper has shifted due to frame flex, or the multipoint lock mechanism has corroded. Salt air attacks the zinc-plated components Mr-Glass used in pre-2019 production.
• Draft or water intrusion at the sill. The weep holes are clogged with debris, or the sill flashing was never properly integrated with the WRB. In Kendall’s summer storms, this shows up as stained drywall below the window, not always as visible water.

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Replacement Cost & What’s Included

These are installed prices, inclusive of removal, disposal, sealant, and trim touch-up. What drives the range: opening size, floor level (second-story carries ladder and scaffolding time), and whether the original installation left the nailing flange intact or cut it flush. We pull permits when required by Miami-Dade code - most full-frame replacements do, sash-only swaps typically don’t. Every replacement carries our 365-Day Done Right Promise under the Haven Standard, and you receive the documented photo record before we leave.

DIY or Call Us?

There’s no high-tension spring or electrical hazard in a window replacement, but there is a precision hazard. An owner can safely check the model stamp, measure the opening, and clear weep holes with a piece of wire. Where DIY goes wrong: setting the sash without confirming the frame is square to 1/8 inch, which torques the IGU and guarantees seal failure within two years. Or using silicone where backer rod and polyurethane sealant are specified, which voids the water intrusion warranty.

We don’t recommend removing an impact-rated sash without understanding the fastening sequence - the clips are designed for wind-load retention, not easy release, and prying the wrong edge cracks the glazing. If you’ve already measured twice and you’re uncertain, call (786) 321-3319. We’ll schedule the measured survey, give you the written price, and you decide from there. Measure once, document it, then cut.

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