Mr-Glass Home Additions & ADU Nationwide

Mr-Glass Home Additions & ADU: The Redwood City Owner’s Guide

We stock and install Mr-Glass-compatible glass systems for home additions and ADUs in Redwood City, with typical installed pricing from $45,000 to $130,000 depending on wall area, header engineering, and whether the unit ties into a new foundation or an existing slab. Most Mr-Glass replacement and new-install projects we quote in Redwood City are scoped, priced in writing, and scheduled within a week. Homeowners usually discover an issue when the sliding panel sticks in the track, the fixed panel fogs between the glass layers, or the locking hardware no longer seats flush after seasonal expansion cycles.

Call (650) 560-7228

Which Mr-Glass Models This Applies To

Mr-Glass produces several series relevant to home additions and ADU builds: the 300 Series residential sliding wall, the 500 Series lift-and-slide door, and the 700 Series fixed architectural panel. The 300 Series uses a 2.5-inch aluminum frame depth with dual-wheel truck assemblies; the 500 Series requires a deeper 4.5-inch pocket in the wall assembly for the lift mechanism. Identification is straightforward: the frame edge carries an etched series mark near the bottom rail, and the interlock stile (the vertical frame member where panels meet) has a profile shape unique to each series. We match OEM spec on hardware and weatherstrip, though for glass-only replacement we often source tempered, low-e coated units from the same Cardinal Glass plant that supplies Mr-Glass directly. The aftermarket equivalent carries the same SGCC certification and NFRC rating at roughly 15% lower parts cost, which we pass through in the written quote.

Signs Your Mr-Glass Home Additions & ADU Is Failing

• Condensation between glass layers. The insulated glass unit (IGU) seal has failed, allowing moist Bay Area air into the airspace. In Redwood City, morning marine layer exposure accelerates this; once fog appears, the Low-E coating degrades and the unit must be replaced, not defogged.
• Panel drags or binds in the track. The nylon truck wheels have flattened or the stainless track rail has dented from debris. We see this often in ADU conversions where the original threshold was not rated for the panel weight.
• Locking hardware spins without engaging. The multipoint lock gearbox has stripped, usually from forcing the handle when the panel is slightly out of plumb. Mr-Glass uses a proprietary backset spacing, so generic hardware will not bolt up.
• Air infiltration at the frame perimeter. The bulb weatherstrip has compressed past recovery or the end-dam flashing was omitted during original install. Redwood City’s combination of dry summers and wet winters is hard on rubber compounds.
• Visible frame corrosion at the sill. Aluminum frames without thermal break isolation can sweat in conditioned additions, and the anodized layer eventually pits. This is cosmetic until it reaches the weep channels, then it becomes a drainage problem.

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Replacement Cost & What’s Included

Mr-Glass system work for home additions and ADUs in Redwood City falls within our standard home addition range of $45,000 to $130,000, with glass-specific repairs and panel replacements typically at the lower third of that span. A single IGU replacement runs $800 to $2,500 depending on size and whether the panel is tempered or laminated; full panel and frame replacement with re-flashing starts around $4,500. Truck assembly and track repair runs $600 to $1,800. Every quote is flat-priced with line-item parts and labor, written before work starts, under Clause 1 of the Haven Standard. The 365-Day Done Right Promise covers installation and hardware; glass carries the manufacturer’s warranty against seal failure, which we register on the customer’s behalf.

DIY or Call Us?

An owner can safely inspect the etched series mark, check the track for visible debris, and confirm whether the weep holes at the sill are blocked with paint or caulk. Beyond that, Mr-Glass panels are heavy: a typical 8-foot by 10-foot fixed unit weighs over 400 pounds, and the lift-and-slide mechanism in the 500 Series stores significant spring tension. Removing or adjusting these without proper support risks panel drop, glass breakage, and injury. We do not recommend DIY removal of any panel over 150 pounds. Call (650) 560-7228 and we will scope the work, photograph the condition, and deliver a written price before any tool comes off the truck.

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