Mr-Glass Home Additions & ADU Nationwide

Mr-Glass Home Additions & ADU: The San Diego Owner’s Guide

We stock and install Mr-Glass-compatible glazing systems for home additions and ADU projects in San Diego, with typical installed pricing from $53,100 to $153,400 for full addition builds and $106,200 to $259,600 for detached ADU construction. Most Mr-Glass specification reviews and material takeoffs are completed same-day during our initial site visit. Homeowners usually discover an issue when condensation appears between panes, the frame separates from the rough opening, or the sliding panel drags - signs that the insulated glass unit or the aluminum thermal break has failed after years of San Diego’s salt-air exposure.

Call (858) 434-8926

Which Mr-Glass Models This Applies To

Mr-Glass produces several product lines that appear in San Diego home additions and ADUs, and matching the right system matters for both performance and permit compliance. The most common we encounter are the MG-5000 series fixed architectural windows, the MG-7000 sliding door systems, and the MG-9000 folding glass walls popular for indoor-outdoor ADU designs in neighborhoods like North Park and South Park.

To identify your unit, check the etched mark in the glass corner - it lists the series number, the glass configuration (typically 1″ or 1-1/8″ overall unit thickness for coastal California), and the Low-E coating spec. The frame extrusion profile also carries a die number stamped on the interior rail. OEM glass units from Mr-Glass carry a 10-year seal warranty, but we’ve found that quality aftermarket IGUs from Cardinal or Guardian, fabricated to the same dimensional spec with matching warm-edge spacers, perform identically in San Diego’s climate and often ship faster. The critical compatibility point is the spacer width: Mr-Glass frames accept a specific 1/2″ or 9/16″ spacer, and a mismatch will compromise the structural silicone bite.

Signs Your Mr-Glass Home Additions & ADU Is Failing

• Fog or condensation between panes that doesn’t wipe away. This means the edge seal on the insulated glass unit has failed, allowing moist San Diego air to enter the airspace. Once the desiccant in the spacer saturates, the fogging becomes permanent and the unit’s thermal performance drops sharply.
• Frame corners gaping or sealant cracking at the perimeter. The aluminum thermal break expands and contracts with daily temperature swings, and after 15-20 years near the coast, the structural silicone can degrade. This gap lets water into the rough opening, which we often find during ADU inspections in Mission Beach and La Jolla.
• Sliding panel drags, sticks, or requires force to move. The stainless steel roller carriage wears flat spots, or the track accumulates corrosion from salt air. In folding systems, the hinge pin bushings erode, causing the panel to rack and stress the locking hardware.
• Drafts or noticeable temperature difference near the glass. The argon fill has escaped through a micro-leak in the seal, and the center-of-glass U-value has risen from around 0.25 to 0.40 or higher. You’ll feel it first on east-facing additions during San Diego’s morning sun.
• Visible water staining on interior drywall below the unit. The weep holes in the sill track are clogged with debris or the sill pan was omitted during original installation - a code issue we flag immediately, as it can rot the subfloor in an ADU where space is already tight.

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Replacement Cost & What’s Included

The range reflects three factors: unit size and series, whether the original frame can be preserved, and access difficulty. A second-story ADU in a dense San Diego neighborhood with no crane access adds labor hours for manual hoisting. Our quote includes the fabricated IGU or sash, removal and disposal of the failed unit, perimeter sealant with Dow 795 for UV stability, and a written 365-Day Done Right Promise on the installation. Under Clause 1 of the Haven Standard, you receive the full price in writing before we order any glass.

DIY or Call Us?

There’s a clear line here. A homeowner can safely inspect: check the etched label for the series number, photograph any fogging for documentation, and clear weep holes with a pipe cleaner. What you should not attempt is removing a large IGU or sliding sash yourself. These units weigh 80-150 pounds, the frame is under structural load, and improper handling can shatter tempered glass or distort the frame extrusion. We’ve been called to correct DIY removals in San Diego where the owner cracked the replacement IGU during insertion because the setting blocks were omitted.

For folding wall systems, the hinge alignment is measured in 1/16″ increments; a racked panel will destroy the weatherstrip and void any remaining warranty. Call (858) 434-8926 and we’ll schedule a free estimate with a written scope and price.

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