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Frameless Sliding Glass Walls

Redefining the Northern California home experience


At Cover Glass Northern California, we help homeowners elevate their living environment with gorgeously unique sliding glass walls. Imagine this: when you wake up, you take in completely unobstructed views of mist rolling over the bay right from the comfort of your bed. This could become a reality with Cover Glass’ frameless folding windows and doors. It’s amazing how a frameless glass wall instantly livens up any space and makes a house a home.

We’ve also helped redesign business throughout Northern California. Maybe you own a tech startup based in Silicon Valley and are looking to elevate the office workspace layout with an open concept design? Or maybe you’re a restaurant owner in San Francisco that wants to make full use of your indoor and outdoor space? That’s where Cover Glass Northern California comes in. Say goodbye to traditional windows and say “hello” to an open-concept design that brings an attractive, modern element to your property.

Benefits of Frameless glass doors

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Cover Glass frameless folding windows and doors allow homeowners, homebuilders, architects, and business owners alike to enjoy completely unobstructed views of the NorCal coastline. Who wouldn’t want to appreciate uninterrupted views of the Golden Gate Bridge or Pier 39 in San Francisco? With our elegant frameless sliding glass doors, you can experience wide-open views, open-concept design, and tremendously enhance your living experience.
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Our frameless folding glass doors will instantly increase the property value of your Northern California home or business. Installing folding glass windows and doors will not only bring a luxurious element to your property, but they will also add livable space, optimize your floor plan, and enhance viewpoints. Our customers across Northern California love their Cover Glass sliding frameless folding windows because they add REAL value to their properties.

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Cover Glass Northern California uses the highest quality frameless glass that only takes up 1 inch per panel when stacked. Our frameless folding windows allow for the thinnest stack possible - the best in the industry. 


You can customize your Cover Glass frameless glass doors functionality by stacking them either on the left or right, it’s all up to personal preference. This can open up your home, seamlessly blending the inside with the outside - perfect for views of Santa Cruz or of Big Sur.

Patio with three frameless glass doors slightly open

Fully open, partially open, or half-open - the choice is yours! Cover Glass’ frameless folding windows allow customers the ability to open or close as many or as few of the sliding glass panels as they would like. This functionality is perfect for allowing the crisp San Jose air to filter into your home or commercial property. Even better, you’ll save on your utility bill during the hot summer months because of Cover Glass frameless folding windows’ ability to ventilate.

Beautiful view from inside home through frameless glass doors

Every Cover Glass folding glass panel is made using state-of-the-art tempered safety glass, which is 5x stronger than regular glass. They’re completely secure - our windows and doors can stand up to intruders and blunt-force objects. Our frameless folding windows and doors will also handle any gusty Northern California winds (up to 222 mph) without a problem. 


Cover Glass frameless doors can’t lift from their track and are made to lock from the inside - allowing you peace of mind knowing that no one can mess with your sliding glass doors.

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Here at Cover Glass Northern California, we use Low-E (low-emissivity) glass technology. We pride ourselves in using this technology as it improves energy efficiency, reduces energy usage, and protects your home from unwanted UV rays that can negatively impact your health and your furniture. We highly recommend upgrading to low-E sliding frameless glass windows - it will positively impact your finances. Compared to traditional clear glazing, we use a Low-E technology via spectrally selective coating that is a higher and long-lasting quality, promising you the biggest bang for your buck. 

FEATURES of folding glass doors


As a top hung glass manufacturer, our system relies on sturdy tracks or beams concealed in the ceiling in order to support the weight of the door beneath. The effortless gliding motion of our frameless glass makes opening, stacking and closing a breeze.

Since the wheel assembly of a top hung system remains fully enclosed inside the track, gravity sees to it that the mechanism stays clean and dirt-free thanks to its suspended state. Maintenance of a top hung slider is quite straightforward, with the boxed-in design allowing easy access to wheels and bearing sub-assemblies when necessary.

Another benefit to top hung frameless sliding glass doors is the ability to set the tracks into a foundation, completely flush with the floor surface. That means no more tripping over unseen ledges and worrying about cleaning nooks and crannies.

With no vertical frames between our frameless glass, you will enjoy a new level of clarity that few homeowners experience in today. We use UV protected translucent polycarbonate channel, which directly interlocks and tightly seals into the next panel.

With a unique specialization in creating custom openings for clients, we're able to install frameless sliding glass doors in a variety of interior and exterior locations. At Cover Glass, the only limitation is your imagination.

Flexibility and functionality are at the forefront of what makes our folding glass doors such a special product. Because each glass panel slides individually, you will have the seamless ability to open the glass system entirely, create air gaps for natural ventilation, open one panel, combine two panels in the center--the choice is yours. 

Our standard locking hardware is much more robust than what you find in other frameless glass doors.

We use two deadbolts: one at the top and one at the bottom of the first opening panel. Unlike other glass door systems, there are no floating handles, which means that it is virtually impossible to enter from the outside.

We also provide nonstandard options for clients that favor a handle or want key entry access from the exterior. Another choice is a lock on every panel.

You can pick the solution you feel the most comfortable with for security reasons and to match your lifestyle.

Once the system is opened and stacked, we make sure our panels remain stacked thanks to magnetized technology on each of glass panel. This prevents the frameless glass doors from moving out of place if a strong gust of wind comes, or if anyone happens to walk into them if not paying attention.

TECHNICAL INFORMATION of folding glass doors

The upper and lower profile of our frameless glass system consists of a uniquely designed steering track which suspends from the top-hung position and is gently supported from the lower base. Made with stainless steel fasteners at the top and bottom position, each folding glass panel is fixed into glazing channels, ensuring each piece of frameless glass fits seamlessly and securely.

One of the best advantages of our track system is the ability to match the lower profile with your finished flooring on either side. The lower profile is available in a variety of different colors that can be customized to match your interior design. Additionally, the top profile and side jambs can all be covered as all parts operate inside of the profile. Cover Glass has a variety of options suitable for any style of Northern California home – from classical architecture to the ultra-modern.

Closeup of glass door meeting wooden floor

Once we have a clean opening from you or your contractor, the installation of our frameless glass doors is a very simple two-step process. However, we will need any obstruction to be removed before installation begins, which includes having the header and sides both exposed.
If you want to recess the bottom track so that it matches with your finished flooring, we need the cut into the floor to be provided beforehand. We will work with you and/or your contractor to provide all the necessary details.

The initial stage of the installation consists of weatherproofing the frameless glass, installation of the top and bottom track, and the drilling of weep holes or drainpipes (depending on your property requirements). Once complete, we'll then laser measure and reserve the tempered glass from our supplier base.

Once we acquire the sliding glass doors from our supplier, we will then fit the glass into the tracks and complete the installation process. In terms of installation duration, it takes approx. one working day per 18 feet of track or glass and a total lead time of just under a month fully installed. This may vary depending on a variety of factors including (but not limited to) pre-existing schedules and customer demand.

Large truck carrying frameless glass windows
We do our own draining at Cover Glass, which is a huge benefit to our customers. This is done in either of two ways: 1.) Drilling weep holes 2.) Installing drainpipes.

For weep holes, we drill individual holes at the base of the track, allowing any water that hits the glass to easily disperse.

For drainpipes, we utilize the same lower profile of the track as weep holes and attach connectors to our pipes. If any water hits the frameless glass it will trickle down the system, run into the track and automatically weep away from the panels. The drainpipes will be connected to any landscape or any other drainage systems that you might have to remove the water efficiently and properly.

View of drain system created for Cover Glass USA glass doors
At Cover Glass, we use special polycarbonate UV protected weatherstrips that completely seal your system and protect your property. When two glass panels come together at the H-Channel, there is an automatic interlocking that occurs, protecting your property from any moisture, wind or air that tries to get through. Additionally, because Cover Glass uses UV protected weather-strip technology, your system will never become brittle or yellow.
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Curious about installing frameless sliding glass doors

Cover Glass Northern California, LLC

1185 Campbell Ave.
San Jose, CA 95126

(888) GLS-DOOR