Gentle Cleaning / Steam Cleaning & Coating Removal

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Cleaning and coating removal sounds straightforward — until you’re dealing with a heritage façade, architectural concrete, or an exposed substrate that can be permanently damaged by the wrong method.

Aggressive blasting, harsh chemicals, or excessive pressure can do more harm than good:

• etching cement paste
• damaging mortar joints and arrises
• exposing aggregate unintentionally
• creating patchiness and colour variation
• or driving water and contaminants deeper into the wall

PCR treats cleaning as a restoration step, not a washdown. The goal is to:

• remove what needs to be removed — dirt, staining, biological growth, failed coatings, or surface contamination
• preserve what should remain — texture, patina, sharp edges, mortar integrity, and substrate character
• leave the surface in the right condition for the next stage — whether that is repairs, repointing, protective coatings, staining, or sealing

✅ Our Cleaning & Surface Preparation Packages Typically Include:

Assessment & trial approach

• Identify the substrate type and sensitivity, including brick, stone, block, architectural concrete, precast, and older mortar-based surfaces
• Confirm what is on the surface: dirt, mould, algae, lichen, efflorescence, paint, anti-graffiti coating, sealer residue, rust staining, or general environmental contamination
• Trial a small area first where required, to confirm the right method and avoid unnecessary damage or over-cleaning

Steam cleaning

• Controlled steam cleaning to lift grime, biological growth, and general surface build-up
• Lower-impact cleaning option compared to aggressive high-pressure washing
• Particularly useful where the goal is to clean the façade while preserving surface texture and substrate integrity

Acid washing (where suitable)

• Controlled acid washing for concrete and masonry surfaces where a deeper clean, cement residue removal, or stain reduction is required
• Used selectively and carefully — not as a default method
• Particularly relevant for removing cement smears, surface contamination, and helping prepare some surfaces before staining, sealing, or remedial works
• Always assessed against the substrate condition, as the wrong acid strength or dwell time can permanently alter the appearance of the surface

Controlled cleaning methods

• Low-pressure washing where appropriate
• Gentle mechanical preparation for stubborn contamination or failing coatings
• Localised chemical cleaning methods selected to suit the substrate and avoid long-term damage
• Neutralisation and proper rinsing where acid or chemical methods are used

Coating / sealer removal

• Removal of failing paints, clear sealers, anti-graffiti systems, and incompatible surface treatments
• Controlled approach to avoid scarring, over-etching, or damaging the face of the substrate
• Preparation of the surface to the correct cleanliness and profile for follow-on works

Post-cleaning preparation

• Identify hidden defects revealed during cleaning, such as cracks, delamination, open joints, honeycombing, or failed previous repairs
• Prepare the substrate for repointing, repairs, coating systems, or protective treatments
• Leave the surface in a condition that supports the next trade, rather than creating new problems

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🏗 Typical Applications

• Heritage brick and masonry façades
• Architectural concrete walls, columns, and feature elements
• Precast façades prior to repairs, joint remediation, or protection
• Surfaces affected by dirt build-up, biological growth, staining, or failed sealers
• Concrete requiring preparation before painting, staining, texture coating, or sealing
• Façades and exposed elements where cement residue or construction staining needs to be reduced carefully

🛠 Common Problems We Solve

• General dirt build-up and uneven façade presentation
• Mould, algae, and lichen that retain moisture and accelerate deterioration
• Efflorescence residues and repeat staining caused by incorrect cleaning methods
• Cement smears and surface contamination requiring controlled acid washing
• Peeling or flaking coatings that trap moisture and spoil the finish
• Surfaces that need cleaning but cannot tolerate aggressive blasting or harsh high-pressure treatment
• Inconsistent, patchy surfaces that need to be cleaned and prepared carefully before restoration or finishing works

📌 Why Choose PCR?

• Restoration-first mindset — preserve the substrate, don’t just “make it look clean”
• Practical understanding of when to use steam cleaning, acid washing, mechanical preparation, or a combination of methods
• Trial-based approach to reduce risk on sensitive or high-visibility surfaces
• Strong integration with façade repairs, repointing, staining, sealing, and protective coatings
• Practical delivery on live sites with staging, containment, and public safety in mind
• ISO-backed QA systems with documented methods and outcomes

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