Why Sympathetic Care Trumps Standard Jet Washing
When restoring period features within traditional grounds or historic walled gardens, off-the-shelf cleaning solutions often do more harm than good. A recent 5-star Google review from one of our clients highlights precisely why specialist care is essential when dealing with delicate outdoor masonry:
“Ashlar made the most wonderful job of sympathetically cleaning up traditional garden ornaments and paving slabs in my walled garden. The work was done efficiently and by incredibly polite and courteous staff. Not your usual jet washing, far more advanced than that! Highly recommended. Even my dogs approve!”
Edith
This feedback captures the heart of our approach at Ashlar: delivering high-level technical care while respecting the historic character of your property and ensuring a seamless, friendly experience for your household (four-legged family members included!).
The Danger of “Usual Jet Washing” in Historic Gardens
Traditional garden ornaments, carved stone urns, ancient birdbaths, and weathered paving slabs are usually made from porous sandstones, historic lime mixes, or terracotta.
While a standard high-pressure jet washer might offer quick gratification, it is often destructive to aged masonry:
- Surface Stripping: High-pressure cold water shears away the top skin of aged stone, leaving it pitted and micro-fractured.
- Mortar Loss: Kinetic water force blasts away fragile lime pointing between historic paving slabs, allowing water to pool beneath.
- Accelerated Biological Decay: Gouging deep fissures into stone surfaces creates perfect anchor points for organic spores to settle, causing lichen and algae to return faster and hold tighter.
How Ashlar Cleans Sympathetically
Achieving a clean finish while preserving the natural patina of traditional garden stonework requires a gentle, controlled technique. Our process follows four key stages:
- 1. Substrate & Patina Assessment: We carefully inspect the stone’s age, porosity, and the specific type of biological growth present before applying any water or treatment.
- 2. Low-Pressure Superheated Steam: Using specialised DOFF steam systems, we heat water up to 150°C while keeping operating pressure extremely low.
- 3. Deep Biological Sanitisation: The intense heat instantly breaks down organic growth, killing moss, lichen, and algae roots without relying on harsh chemicals or abrasive force.
- 4. Rapid Drying & Preservation: Because superheated steam uses minimal water volume, the stone dries quickly without soaking the surrounding ground or saturating the masonry core.
This leaves delicate carved details sharp, preserves the gentle character of the aged stone, and sanitises biological spores at the root level so the results last significantly longer.
Complete Care for Estate & Residential Grounds
Whether you are preparing a private walled garden for the summer, maintaining listed estate features, or refreshing tired terrace paving, our team bring conservation-grade care directly to your home.
Our Services Include:
- Traditional Paving & Terrace Restoration: Safe cleaning for sandstone, flagstones, slate, and Yorkstone paving.
- Architectural & Decorative Masonry: Gentle preservation for garden statues, stone balustrades, urns, and fountains.
- Heritage Wall Cleaning: Low-pressure care for brick, lime-pointed masonry, and stone retaining walls.
Ready to Restore Your Garden’s Exterior Stonework?
If your garden features or paving need a sympathetic, professional refresh that goes far beyond standard jet washing, our team is here to help.
Contact Ashlar Stone Cleaning Today to request a property consultation or discuss your restoration project.