Restoration of Historical stonework:

Removing Environmental Staining, salts, nitrates, phosphates, soot, smoke, heavy soiling, patina, Efflorescence, graffiti, etc., is often the first improvement for proper maintenance of masonry. If contaminants become too heavy, they can contribute to accelerated deterioration, loss of detail, and gradual erosion of the masonry.

The cleaning process you choose to remove these contaminants from any masonry building must be carefully considered before arriving at a decision to proceed. The process may range from ineffective, to harsh and damaging causing disfigurement.

Traditional Cleaning Methods:

Traditional Cleaning methods can usually be broken down into 3 categories: Water, Chemical, and Mechanical

Water: A low pressure water wash is often considered “not enough”, and a high-pressure wash or steam cleaning can destroy the brick and mortar while forcing moisture deep into the stone itself. Since brick and stone are porous they may absorb moisture, leading to spalling or cracking. This excess water will also contribute to bringing soluble salts from within the masonry to the surface leading to the formation of efflorescence

Chemical: some types of masonry will dissolve easily with acidic cleaners, even in a diluted form. Some chemicals can change the color of the masonry itself as well as leave a hazy residue despite a heavy rinse. They can react with components of mortar, stone, or brick to create soluble salts and eventually lead to efflorescence. Historic Brick buildings are particularly susceptible to damage from hydrochloric (muriatic) acid.

 Mechanical Cleaning:  Abrasive blasting, hand tools, grinders, sanding discs, wire brushes, etc. all abrade the contaminants off the surface with damaging results. Brick is a fired product and is hardest on the outside where temperatures were the highest; damaging this protective layer will expose the softer brick to accelerated environmental deterioration. Therefore, mechanical cleaning should not be used, especially on mortar joints using limestone.

Environmentally Friendly Surface Restoration Methods:

DRY ICE BLASTING:  Quickly becoming the industry standard for restoration of historical stonework, this powerful, and efficient, and Environmentally Friendly Surface Restoration method removes paint, mold, smoke stains, soot and years of dirt, scum and carbon build-up from any surface while bringing out the original, beautiful, and delicate finishes originally hand-crafted into the facades, entryways, walls, and ceilings of these beautiful, old historic structures.

The Advantages of Dry Ice Blast Cleaning

In the hands of a skilled blast cleaning technician, Dry Ice Blast Cleaning can be either aggressive enough to clean but delicate enough to protect even the most intricate work in masonry, stone, terracotta, clay, marble, and limestone.

  • dry ice blasting does not scratch or stain the surface. Instead, it uncovers the underlying surface and restores historic structures to their original beauty and detail.
  • Ice blast cleaning is easy to control and reaches the tightest cracks and corners without damaging surrounding objects.
  • Ice blasting is safe for the environment because it does not use dangerous chemicals or leave hazardous fumes behind.
  • and is safe for workers since it is non-flammable and non-conductive.
  • No secondary waste to clean up or dispose of after
  • Little to no containment is necessary, saving you money.

Why Choose Impact Industrial Services for Your Historical Restoration Project?

The architects that specify restoration work will often not allow chemicals or abrasive cleaning methods to be used in restoration due to the chemicals tendency to leach into stone, brick and even marble. Abrasive cleaning methods will scratch and scar the surface being cleaned and media such as soda will remain in the pores of the brick as well as kill surrounding vegetation. Both chemical and traditional abrasive cleaning alters the integrity of the very surface the restorers are trying to preserve. By Using Impact Industrial Services, you are meeting the specific specifications set forth by the architect as well as making the right choice in choosing an “Environmentally Friendly Surface Restoration” process.

Our list of Historical Restorations includes historic church’s, 100+ year old brick buildings, fireplaces, as well as marble, tyndall, and sandstone cleaning. We have a resume of restoration projects to landmarks from the turn of the century that include the Old No.1 Fire Hall in Regina SK., St Paul’s Cathedral Church, and Knox Metropolitan Church.