Limestone Damage Caused by Improper Cleaning Methods

Limestone Damage Caused by Improper Cleaning Methods

by | Feb 19, 2025 | Limestone Cleaning Chicago, Limestone Pressure Washing Chicago

Here are some common examples of limestone damage caused by improper cleaning methods:

Etching from Inexperienced Pressure Washing Companies and Homeowners: This by far is the #1 leading cause of limestone etching. So many jobs I estimate for cleaning that have been damaged forever because of the inexperience of the previous homeowner or a company that does not specialize in limestone cleaning trying to perform normal pressure washing on limestone.

I am leaving an example below of a 3 million dollar home just built in 2023 that was ruined because in 2024 just because the home manager was trying to keep up with the home. The entire facade of limestone was etched by Bubble window cleaning in Lincoln Park Chicago. I am not trying to knock anyone here, this is just a sad story and I would hate for this to happen by anyone else. Please perform your due diligence before cleaning your limestone or hiring a company to clean or pressure washing the limestone on your home.

Etching from Acidic Cleaners – Limestone is highly sensitive to acidic solutions like vinegar, bleach, or muriatic acid. When these substances are used, they dissolve the calcite in the stone, leading to dull spots, rough textures, and permanent surface damage.

Spalling and Flaking from Improper Washing – Using excessive water pressure can force moisture deep into the stone, causing it to break apart from within. Over time, this leads to spalling (surface peeling) and flaking, which weakens the stone and makes it prone to further deterioration.

Discoloration from Harsh Chemicals – Some chemical cleaners contain strong alkalis or harsh detergents that can react with the minerals in limestone. This can cause unsightly stains, yellowing, or a chalky residue that’s difficult to remove.

Pitting and Surface Erosion from Abrasive Cleaning – Sandblasting or using harsh brushes can wear down the soft surface of limestone, creating pits and uneven textures. This can permanently alter the stone’s appearance and make it more susceptible to future staining and damage.

Biological Growth from Excessive Moisture – If limestone is cleaned with too much water and not dried properly, it can encourage algae, mold, and mildew growth. This can cause green or black staining and, over time, weaken the stone’s structural integrity.

Cracking from Freeze-Thaw Cycles – If water is improperly introduced into limestone during cleaning, it can seep into cracks and pores. When temperatures drop, the water freezes and expands, leading to cracks and breakage over time.

If you would like to know more please call 312-384-0044

Limestone Damage From Bubbles Window Cleaning Lincoln Park
Limestone Damage From Bubbles Window Cleaning Lincoln Park
Limestone Damage Caused by Improper Cleaning
Limestone Damage Caused by Improper Cleaning
Understanding Chicago Limestone

Understanding Chicago Limestone

by | Feb 19, 2025 | Limestone Cleaning Chicago

Chicago’s architectural landscape is adorned with a variety of limestone structures, each contributing to the city’s rich historical and aesthetic fabric. Understanding the specific types of limestone used in these buildings is crucial, especially when it comes to cleaning and maintenance, as each type possesses unique characteristics that dictate appropriate care methods.

Common Types of Limestone in Chicago Architecture

Joliet-Lemont Limestone (Athens Marble): Quarried from the Lemont and Joliet areas in Illinois, this dolomitic limestone, also known as “Athens Marble,” was extensively used in Chicago’s 19th-century buildings, including the iconic Chicago Water Tower. Its durability and distinctive appearance made it a popular choice during the city’s rebuilding phase post the Great Chicago Fire of 1871.

Indiana Limestone (Bedford Limestone): Sourced from quarries in south-central Indiana, this limestone gained prominence in the late 19th and early 20th centuries. Renowned for its uniform texture and ease of carving, Indiana limestone has been used in numerous Chicago landmarks, such as the Tribune Tower.

Coquina: A sedimentary rock composed predominantly of shell fragments, coquina is relatively soft and porous. While not commonly used in Chicago’s primary architecture, it may be found in ornamental elements or specific installations.

Dolomite: Similar to limestone but containing magnesium, dolomite is slightly harder and less soluble. The Joliet-Lemont limestone is a type of dolomitic limestone, contributing to its durability and weather resistance.

How We Determine the Correct Cleaning Process

Each limestone variety has a distinct chemical composition and porosity, which influences how it should be cleaned. Before selecting a cleaning method, we conduct a thorough assessment that includes the following steps:

  • Material Identification: By examining the stone’s texture, color, and composition, we can determine whether it is dolomitic, fossiliferous, oolitic, or another type of limestone.

  • Porosity Testing: We assess the stone’s ability to absorb moisture, which helps us understand how it will react to various cleaning methods and solutions.

  • Chemical Sensitivity Analysis: Using controlled tests, we check the stone’s reaction to different pH levels, ensuring that no damage occurs during cleaning.

  • Environmental and Historical Considerations: Some limestone surfaces have historical coatings, patinas, or environmental wear that require special attention.

  • Test Cleaning: A small, inconspicuous area is cleaned first to observe how the limestone reacts before proceeding with the full process.

Understanding these factors allows us to tailor our approach, ensuring that each limestone type is preserved without risking deterioration. This careful process helps maintain the integrity and longevity of Chicago’s historic and contemporary limestone buildings. For more information Please Call 312-384-0044