When you’re planning a high-end residential or commercial build, the details matter. Glass isn’t just a structural element; it’s a design statement, a performance feature, and often a key part of how a space feels. At Clearlight Glass, we work with architects, designers, and general contractors every day to help bring their vision to life with the right glass for each job.
Two of the most talked-about specialty options in the industry right now are Low-E (Low Emissivity) glass and Low-Iron glass. While they serve different purposes, both are excellent upgrades over standard float glass, especially in spaces where clarity, energy performance, or visual impact is paramount.
Comparing Glass Types at a Glance
Fabrication Capabilities Side-by-Side
Why It Matters Early in the Design Process
Choosing between Low-E and Low-Iron glass isn’t just an aesthetic decision, it impacts everything from thermal performance to fabrication techniques and lead times. For example, Low-E glass often needs to be handled carefully during fabrication due to its coating, while Low-Iron glass may need to be tempered after all decorative treatments are complete.
At Clearlight Glass, we help you weigh the tradeoffs early. Whether your client is focused on LEED certification, daylighting goals, or making sure their tilework pops in a frameless shower, we’ll guide you to the right product and fabrication strategy.
Our facility is equipped to handle:
- Tempering for both Low-E and Low-Iron glass
- Etching, screen printing, and custom cutouts
- Edgework on high-clarity glass
- IGU fabrication for energy-efficient assemblies
We know what combinations work and what doesn’t, so your designs can move forward without costly revisions.
Let’s Talk Early
If you’re scoping out glass for your next project, let’s talk now, before specs are locked in or procurement becomes a rush. We partner with design and construction teams from concept to installation and love solving creative challenges.
At Clearlight Glass, we don’t just supply glass. We make your ideas buildable.
Still Have Questions?
We’ve put together answers to the most common questions we get about Low-E and Low Iron glass, from etching compatibility to whether your client will notice a green tint. [Jump to the FAQ section below.]
Or better yet, contact us directly to start a conversation about your project.
FAQ
Customer Questions – Low-E Glass
Purpose/Functionality
- What does Low-E glass actually do?
Low-E (low emissivity) glass has a microscopic coating that reflects infrared energy (heat) while allowing visible light to pass through. It helps keep heat inside during winter and outside during summer, making your home more energy efficient.
- Will Low-E glass make my space noticeably cooler or reduce energy bills?
Yes, especially in rooms with a lot of sun exposure. Low-E glass reduces unwanted heat gain in summer and heat loss in winter. That can translate into lower energy bills and more comfortable indoor temperatures year-round.
- Does it block UV rays that can fade furniture or artwork?
Yes. Most Low-E coatings block a significant amount of harmful UV rays—often up to 70% or more—helping protect furniture, floors, and fabrics from fading over time.
- Can you see the Low-E coating? Will it tint my windows?
Most Low-E coatings are virtually invisible, but depending on the specific type, you might notice a slight tint, typically a soft green or gray hue. This is subtle and usually only noticeable when compared side-by-side with untreated glass.
Appearance
- Why does Low-E glass sometimes look slightly green or gray?
The slight color comes from two things: the natural iron content in standard float glass and the reflective quality of the Low-E coating itself. Low-Iron glass with a Low-E coating is available for customers who want ultra-clear results.
- Will it affect the natural light in my home?
Low-E glass still allows plenty of visible light into your home. In fact, most people don’t notice a difference unless comparing it directly with untreated glass. You’ll get the brightness without the heat or UV damage.
Applications
- Is Low-E glass only for windows, or can it be used in mirrors, cabinets, or decorative glass?
Low-E is primarily used in exterior-facing windows, skylights, and doors where thermal performance matters. It’s not typically used for mirrors, cabinets, or interior decorative glass, since the coating isn’t needed and may interfere with other fabrication processes. - Can I use Low-E glass in interior applications or just exterior?
Technically, you can use it indoors, but it’s uncommon unless you’re trying to regulate temperature between rooms or create energy-efficient partitions. For most interiors, standard or Low-Iron glass is a better match.
Limitations
- Can Low-E glass be etched or screen printed without damaging the coating?
Only on the non-coated side. Etching or screen printing on the coated side can damage the Low-E layer or interfere with its performance. If customization is needed, it’s critical to know which surface the coating is on.
- Can it be tempered or laminated safely?
Yes, most Low-E glass types can be tempered or laminated. However, the type of coating matters. Some coatings must be applied after tempering, while others (like hard coats) can go through the tempering process without issue.
- Can I edge, bevel, or do decorative cuts on Low-E glass?
Yes, but with care. All cutting and shaping must be done before tempering. Since the coating is surface-applied, it’s important to avoid damaging it during handling, so special equipment or techniques may be needed.
Customer Questions – Low-Iron Glass
Purpose/Functionality
- What is low-iron glass, and how is it different from regular clear glass?
Low-iron glass has reduced iron content, which eliminates the natural green tint found in standard glass. The result is ultra-clear, color-neutral glass that lets true colors shine through—ideal for modern and high-end applications.
- Is low-iron glass stronger or just clearer?
It’s not inherently stronger than standard glass—it’s the clarity that sets it apart. Strength comes from additional processes like tempering or laminating, which Low Iron glass can undergo just like standard glass.
- Why is Low-Iron glass more expensive?
It costs more because of the extra refining involved to remove the iron. It’s also often used in premium applications, so demand is tied to higher-end design work. The result is worth it, especially when visual clarity is a priority.
Appearance
- Does Low-Iron glass look crystal clear compared to standard or Low-E glass?
Yes. Side by side, Low-Iron glass has a noticeably clearer, truer look; no green or blue tint. This makes it ideal for displaying materials behind the glass or enhancing light-filled architectural features.
- Will it show off my tile, fixtures, or hardware better in a shower?
Absolutely. In a shower enclosure, Low Iron glass gives you a full, true-to-color view of your tile, stone, and metalwork. It’s a go-to upgrade for high-end bathroom renovations.
Applications
- Is Low Iron glass only for high-end projects like luxury showers?
No, it’s also used in tabletops, glass railings, wine rooms, and display cases. Anywhere clarity and color fidelity matter, Low Iron glass is a great choice. But yes, it’s often seen in luxury projects because of its elevated look.
- Can it be used in mirrors, tabletops, or display cases?
Yes to all. For mirrors, it’s used as the base glass before applying the reflective coating. For display cases or tabletops, it offers a clearer view and a more refined appearance than standard glass.
Limitations
- Can low-iron glass be etched or screen printed?
Yes. It’s excellent for both. The clarity of the glass lets etched designs or printed colors appear more vivid and clean, especially compared to the subtle green interference of standard glass.
- Is it compatible with tempering, laminating, or insulating?
Yes. Low-iron glass is often tempered for safety (especially in showers) and can also be laminated or made into insulated glass units (IGUs) for energy performance.
- Can I edge Low Iron glass without chipping or discoloration?
Yes, just like standard float glass. Decorative edging often look better on low-iron glass because of its clarity. As always, proper tooling and finishing make a big difference.