How to Remove Hard Water Stains from Commercial Glass (2024)

  • September 16, 2020

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It is important to remove hard water stains from commercial glass because a clean, fresh appearance sets the stage for what visitors and customers can expect inside.

While perfectly clean windows are the dream of every business owner who wants to make a good impression, it is especially challenging to keep commercial glass clean. It often suffers the effects of construction dust, car exhaust, hard water, and a variety of environmental threats. If you own a commercial building, it’s possible to remove stains and restore glass windows and surfaces to like-new condition with glass stain removal services. Removing discoloration and corrosion and adding a layer of protect rejuvenates and extends their life, saving you from costly replacement.

What Causes Commercial Glass Stains?

The most common window stain culprit is water, specifically mineral-laden water that’s been left to dry rather than removed from the glass. The magnesium and calcium in what’s called “hard water” cause the stains you frequently see on commercial buildings. Because glass is porous, it’s important to remove these stains as quickly as possible. Otherwise, these mineral deposits can make their way within the structure of the glass, causing permanent damage and shortening the glass’s lifespan. Stage 1 is typically the result of soap scum on curtain wall systems or lack of proper maintenance. Stage 2 staining is typically found where minerals run down onto the glass from above each time it rains, or bounce onto the glass from a ledge. Stage 3 staining results when windows have a mineral presence above or below, and the windows receive substantial water during weathering run down, sprinkler system overspray, or from some type of building system which sheds water off of the walls. One of the easiest ways to ensure that a buildings windows don’t get stage 3 staining is through careful, considerate maintenance. Depending on the contributing factors, some windows may require maintenance 3 times per year.

How Glass Stain Removal Services Get the Job Done

Cleaning stains from windows is not as simple as wiping them down with soap and water. If the right products and equipment aren’t used, the glass can easily be scratched or damaged. The best way to attack stains on commercial glass is to hire a professional who’s trained and experienced in the restoration and protection of all exterior building surfaces, including glass.

When we first started, the Presto Restoration used all the latest recommended products and techniques for commercial glass cleaning, restoration, and preservation. Over time we became frustrated with how short-lived or ineffective these treatments and techniques were. Some of them were even dangerous to apply. Based on years of experience, we decided to do our research. We eventually partnered with a team of chemical engineers and developed a full line of proprietary glass restoration and protection products. Our exclusive line is designed to fight all exterior building surfaces, including commercial glass windows.

Industry Leading Glass Cleaning Products

When providing glass stain removal services, we use two products to remove stains and other materials from glass surfaces:

  • EnviRestore® Glass Stain Remover is a curative cream that does not require machinery and is designed to remove obstinate stains from glass surfaces effectively. The water-based product has a 3-year shelf life and removes common “Stage 1” corrosion as well as stains caused by mineral deposits. Acid-free, it repairs damage from oils, soap scum, adhesives, exhaust fumes, everyday grime and buildup, and other stubborn stains. It’s a cost-effective solution that leaves behind no greasy residue and offers easy clean-up.
  • Glass ReSurfacer Final Polish® is the ideal solution for removing concrete, mortar, and other cement-like materials. Its complex polymer technology helps prevent scratching during the restoration process as scrapers are not usually required. Glass ReSurfacer also leaves behind a protective coating that prevents further concrete contamination. The fast-acting, chemist-created solution is a safe alternative to conventional acids and, when used correctly, doesn’t harm glass, caulking, stone, or metal surfaces.

Industry Leading Glass Protection Products

Once stains are removed, we recommend using one of our three glass protection products to extend the life of your windows and other glass surfaces:

  • Glass Defender® HD is an invisible, high-performance application that protects the glass from various damages and prevents scratching for up to 20 years.
  • Glass Defender® MD performs like our HD product, but protects the glass from damaging elements and prevents scratching for up to 10 years.
  • Glass Defender® Primer increases the life performance of Glass Defender MD up to 10 years and Glass Defender HD for up to 20 years.

Innovative Cleaning Equipment

Based on your building and needs, our technicians will use a unique combination of equipment to complete the job. Safety is always their number one priority.

  • Aerial work platforms include articulating booms with multiple movable sections, telescopic booms that extend straight out and offer the greatest horizontal reach, and scissor lifts that extend straight up and provide a smaller ground-level footprint.
  • Swing stages are suspended from beams and play a prominent role in high-rise glass stain removal services. All of our technicians are trained to safely set-up, operate, and break-down swing stages and control suspended scaffold hazards.
  • Rappelling is used when the available space prevents setting up a stage. A Bosun or Boatswain’s Chair is suspended from a rope and allows technicians to access difficult-to-reach areas.
  • Cranes with a cage or basket are used when swing stages and rappelling are not an option for hard-to-reach areas. Cranes are often used when working on high-rise buildings with unique or angled rooflines.

For Presto’s technicians, no angle is too difficult and no access point too high. We thrive on challenges!

Hiring a Professional

Presto’s skilled technicians have extensive knowledge and access to a wide range of modern equipment to handle even the toughest glass stain removal jobs no matter the building type. The actual hard cost of hard water stain removal services is, of course, considerably less expensive than replacing the old windows. In most cases, windows can be completely restored for about 20% the cost of replacement. We find that the best time to perform hard water stain removal services is right now. When a potential tenant views a commercial property with hard water stains on the glass, the building looks run down, and the stains present a distraction when looking out of the windows. We have experience restoring the glass on the following:

  • High-rise corporate headquarters
  • Mid-rise multi-family complexes
  • Historic buildings including churches, museums, and municipal facilities
  • Hospitals and medical centers
  • Retail businesses and shopping centers
  • Schools and other educational facilities

You don’t have to live—or work—with hard water spots or other stains on your building’s windows. Professional glass stain removal services can make your windows shine their brightest and look their best.

If you are looking for a glass stain removal expert in your city, we would love to learn more about your project. We recently completed a glass restoration project on a uniquely shaped office building.

Contact Presto Restoration for a free consultation today.

Call us at 1-800-785-9927 or Request A Quote.

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How to Remove Hard Water Stains from Commercial Glass (2024)

FAQs

How do you remove impossible hard water stains? ›

Vinegar is a safe, all-natural household cleaner with the amazing ability to combat hard water stains. Pour some in a spray bottle and squirt any surface where you find hard water stains. Let it sit for five to 15 minutes to give the vinegar time to break down the minerals in the chalky, white stain.

Can hard water stains be permanent on glass? ›

Because glass is porous, it's important to remove these stains as quickly as possible. Otherwise, these mineral deposits can make their way within the structure of the glass, causing permanent damage and shortening the glass's lifespan.

How do you remove hard water haze from glass? ›

Soak a small rag or dish towel in vinegar, then rub a portion of the glass with the rag. A glass that's milky from hard water buildup should become clearer with each wipe.

Can you use CLR on glass? ›

You can clean water marks off of clear glass with CLR® Calcium, Lime & Rust Remover.

Will WD 40 remove hard water stains from glass? ›

No matter how clean you keep your shower, hard water stains are going to accumulate. And they can be very difficult to remove from your shower doors. But if you have a can of WD-40 Multi-Use product on hand, you can remove hard water stains from shower doors quickly and easily.

What is the best product to remove hard water stains from glass? ›

Use Distilled White Vinegar and Baking Soda Paste

If vinegar alone did not remove the spots caused by hard water, add baking soda as a gentle abrasive. This paste also works well on water-spotted drinking glasses and other glassware.

What is the best product for hard water stains on glass? ›

Hard water stains won't come off with a basic glass cleaner, but luckily pantry staples, like white vinegar and baking soda, will effectively remove the unsightly spots.

Will Magic Eraser remove hard water stains from glass? ›

STEP ONE: WET YOUR MAGIC ERASER.

Water activates the tough micro-scrubbers, so they can dig deep and remove hard water stains from glass and the toughest soap scum, making cleaning shower glass easier than ever.

How do you remove limescale from glass? ›

Before reaching for harsh cleaning chemicals, use white vinegar. This tried-and-tested household product is the best way to clean a shower screen and is highly effective at removing limescale. Always use distilled white vinegar as malt or cider vinegar won't clean as thoroughly and may stain surfaces.

Will rubbing alcohol remove water spots from glass? ›

Rubbing Alcohol: Mix water with rubbing alcohol and wipe the window with it. The mixture may remove mild water spots, and it's great for window maintenance.

Does CLR remove hard water stains? ›

Does CLR get rid of hard water stains? Yes, for stubborn hard water stains on shower walls and tiles, bathtubs, sinks or faucets that need more scrubbing power, you may have to use something stronger than vinegar, like CLR Brilliant Bath Cleaner, a top-tested product that won a 2020 Good Housekeeping Cleaning Award.

How do you remove white haze from glass? ›

Mix two tablespoons of white vinegar to one cup of water and, either using a spray bottle or a paper towel, apply the solution to the glass. The acid within the vinegar will break down any cloudiness. It will also give a more sparkling finish to the glass.

Will a steam cleaner remove hard water stains from glass? ›

If lime deposits are not yet very thick, they can be removed quite easily with the steam cleaner – without the need for tiresome manual scrubbing.

Can Dawn soap clean glass? ›

Dawn as a substitute glass cleaner

One of the most effective ways to clean glass is dish soap – it's what professional window cleaners use when cleaning exterior windows. Dish soap can remove stuck-on dirt and cuts any hazy build-up. It also works well on cloudy mirrors.

How long can I leave CLR on glass? ›

Don't leave CLR for longer than two minutes.

Again, CLR is acidic, which makes it effective, but also means it can cause damage if left in contact with surfaces for too long. Always rinse away with cool water after two minutes of contact.

Is vinegar better than CLR? ›

Vinegar is better for everyday dirt, while CLR works best on soap scum. But if you have issues with rust and hard water stains, you might want to reach for that bottle of CLR first! CLR and vinegar are both used for cleaning different types of stains.

Does vinegar destroy glass? ›

Small Appliances. The plastic and glass surfaces on most small kitchen appliances, such as blenders, coffee makers, and toasters, are safe to clean with vinegar, but you want to avoid any rubber parts or metal that vinegar can corrode.

Does rubbing alcohol remove hard water stains? ›

Rubbing Alcohol or Ammonia

Mild mineral stains can be wiped up with a mixture of rubbing alcohol and water. It's good for mineral stain maintenance. For more difficult spots and stains, try soaking a rag in an ammonia and water solution. This can also work for hard water stains on glass windows.

How do you remove bore water stains from glass? ›

Removing Water Marks From Large Glass or Window
  1. Prepare a mixture of 50% water and 50% vinegar. ...
  2. Now spray this mixture on the areas with water spots. ...
  3. Rinse the glass thoroughly and remove excess water using a sponge. ...
  4. If there are some stubborn water marks, you can loosen the mineral deposits using an old toothbrush.
Aug 14, 2019

What chemical removes stains on glass? ›

One of the most common is a solution of 50 percent vinegar mixed with 50 percent tap water. For extremely tough stains, you may find you need a higher concentration of vinegar. It's important not to spray any solution directly onto the glass (see “How to Keep Your Door Glass Clean”).

Can you use steel wool to remove hard water stains from glass? ›

Steel wool doesn't scratch glass, and actually polishes it. Lots of car owners use steel wool to clean their windshields when water spots form on them. You may use steel wool in combination with whatever cleaner you want, whether vinegar or a commercial window cleaner.

Can you use SOS pads on glass shower doors? ›

“You can carefully use SOS pads to clean shower doors, but you should never use them on the actual shower or bathtub floor,” Carpenter says.

Will baking soda and vinegar damage glass? ›

“Baking soda is an abrasive cleaner, so there is a chance that it will scratch your glass or mirror,” says Marcos Franco, an employee of Mighty Clean Home. If you're looking for an all-natural cleaning substance, he suggests using vinegar on your glass surfaces instead.

Does straight vinegar clean glass? ›

You should use straight vinegar. If your windows are really dirty, it's good to use an extra strength solution to wash them. Just warm 1 cup (240 mL) of white vinegar. It can be applied directly to the glass and it's best to use a spray bottle for this specific solution.

Does baking soda and vinegar clean glass? ›

You can also use water from a bucket. Then fill a spray bottle with white vinegar and completely saturate the glass. Allow it to soak for at least 10 minutes—longer if there's serious buildup. Next, dip a scrubbing sponge into baking soda and scrub the glass.

How do you remove severe water stains from glassware? ›

Soak glass in white vinegar.

If your issue is hard-water minerals, all you have to do is soak your glasses for five minutes in white vinegar. Since it's acidic, it'll dissolve the minerals. For very heavy spots, you can warm the vinegar before soaking.

How do you get stubborn hard water stains off shower glass? ›

How to Clean Hard Water Stains
  1. Soak Glass in White Vinegar. Wearing gloves, Roberson says to dip paper towels into the hot vinegar and stick them to your shower glass. ...
  2. Wipe Down Shower Door. ...
  3. Rinse With Distilled Water. ...
  4. Check Your Water Quality. ...
  5. Wipe Down Glass After Use.
Sep 19, 2022

What removes hard water stains from glass shower doors? ›

The best way to remove hard water stains from your shower doors is to do so using regular household items such as white vinegar and baking soda.

How do you remove limescale from drinking glasses? ›

Soak the glasses in a vinegar and soapy water solution.

Vinegar is acidic and therefore great at breaking down limescale. Mix a solution of warm soapy water, and add two cups of white distilled vinegar. After 15-30 minutes of soaking the glasses in this solution, scrub them with a soft cloth or sponge and rinse.

How do you get thick limescale off shower glass? ›

Get an old spray bottle and mix up a solution with half water, half vinegar and spray on to your shower screen. Depending on how bad the problem is, you may need to use the rougher side of a non-scratch scouring pad with a dollop of elbow grease, before wiping it off and buffing it up with a dry cloth.

Does WD-40 remove calcium deposits? ›

When cleaning a toilet bowl, WD-40 works by softening the rust and lime deposits, so they can be easily wiped away. You don't need to use much of it. Simply spray on the affected area, wait a minute or two and brush it away with a regular toilet brush.

Can I use CLR on my glass shower doors? ›

CLR® Brilliant Bath is about the only cleaner you need to keep your bathroom clean and for cleaning your shower doors. “Wanted to say I just tried CLR Brilliant Bath and was thrilled. It took the hard water residue off of my glass shower doors and bench in an acrylic shower with ease.

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