At Gladstone Tuck Pointing and Restoration, we assess the material type, stain nature, and surface condition before selecting a method. They often start with a trial clean on a small area to evaluate effectiveness and safety. This ensures the chosen method doesn’t harm the surface, especially for historic or sensitive structures.
Methods for Brick and Stone
– Bucket and Brush Cleaning: Uses hot water and a stiff fiber brush, ideal for light dirt removal on all brick types.
– Pressurized Water Cleaning: Includes jet washing, using varying pressures (100-800 psi) to remove stains, suitable for tougher grime but requires skill to avoid surface damage.
– Chemical Cleaning: Involves acids or detergents for stubborn stains, used cautiously to prevent etching or discoloration.
– Specialized Techniques:
– DOFF Cleaning: Uses superheated steam (up to 150°C) for gentle cleaning, perfect for historic buildings (Stonehealth).
– TORC Cleaning: Employs water, air, and fine granulate for sensitive surfaces like sandstone, effective for paint and carbon removal (See Brilliance).