Mirrors & Reflective Glass

Mirrors and Reflective Glass Are Not the Same Product

These get conflated constantly, and they are made differently and used for different things.

A mirror is float glass with a metallic silver coating applied to the back, sealed with copper and protective paint. It is an interior product, and the coating is on the rear face where it is protected.

Reflective glass is architectural glazing with a thin metallic coating applied to a surface inside the unit. It reflects a proportion of solar energy and light while remaining transparent. It is a facade product for managing solar gain, and it is only mirror-like from outside in daylight — because the outside is brighter than the inside.

That last point is the one to be clear about. The "one-way" effect is entirely a lighting condition, not a property of the glass. After dark, when the interior is lit and the exterior is not, the effect reverses and the room is visible from outside. Anyone specifying reflective glazing for privacy needs to understand that it works only during the day.

Mirror Types

Standard silvered mirror on clear float. The green of ordinary float glass is visible in the reflection — most obvious in a large mirror, and noticeable against white bathroom fittings or pale stone.

Low-iron mirror removes that cast and reflects colours accurately. Worth the difference in a bathroom, a dressing area or anywhere someone judges a colour in the reflection. On a small mirror in a hallway it is not.

Tinted and antique mirrors — bronze, grey, smoked and distressed antiqued finishes — are decorative. Antique mirror is deliberately aged and every sheet differs, so on a job using several panels they should be selected together.

Safety Backing, and Where It Is Required

A mirror is usually annealed glass, which breaks into large sharp shards. Safety backing is a film bonded to the rear that holds the fragments in place if it breaks.

We specify it as standard on anything in a bathroom, in a gym or studio, on a wardrobe or closet door, on any full-height wall mirror, and anywhere in a circulation route. The cost is small and the difference in a failure is considerable. Where a mirrored panel forms part of a door or has to meet safety glazing requirements, a toughened mirror or a laminated construction is used instead.

Edges, Fixing and Moisture

Mirror edges are polished, ground or bevelled. A bevel is a wide angled edge catching light around the perimeter — traditional and more expensive.

Fixing is by adhesive, clips, standoffs or J-channel. Two things matter. All holes and cut-outs must be made before any toughening, because a toughened mirror cannot be drilled afterwards. And the adhesive must be mirror-safe — ordinary construction adhesives attack the silvering and cause black edge creep, which is the dark tarnishing that spreads inward from the edges.

That black edge creep is also what moisture does. In a bathroom, a mirror fixed tight to a wet wall with no ventilation behind it will tarnish at the edges within a few years. Sealing the edges and leaving the back able to breathe is what prevents it, and it is an installation matter rather than a product one.

Where These Are Used

These describe the kind of work each area brings rather than any specific client project.

Bathrooms and dressing rooms — citywide. Low-iron mirror where colour accuracy matters, safety backed, with edge sealing and ventilation behind. The most common mirror complaint we see is black edge creep, and it is almost always adhesive or moisture rather than a faulty mirror.

Gyms, studios and schools — citywide. Large wall mirrors where safety backing is not optional. Fixing has to account for the weight and for people falling against it.

Restaurants and retail — Astoria, SoHo, Williamsburg, the Lower East Side. Antique and tinted mirror used decoratively, often over large wall areas where panels must be selected together for consistency.

Reflective facade glazing — Midtown, Long Island City, Hudson Yards. Solar control work, where modern coated glass such as Solarban generally does the job better than traditional reflective glass, with far less of the mirrored appearance. Worth discussing before defaulting to reflective.

Tell us the size, whether it is a wet area, and how it is being fixed. We supply and fabricate across Manhattan, Brooklyn, Queens, the Bronx and Staten Island, and throughout Northern New Jersey, the Jersey Shore, Philadelphia and the Lehigh Valley.