A Guide to Maintaining Charred Timber Cladding
- QTD Ltd
- Jun 11
- 3 min read
Charred timber cladding, also known as Shou Sugi Ban, is a traditional Japanese technique that involves charring the surface of wood to enhance its durability and aesthetic appeal. This method creates a striking, textured finish that is both beautiful and functional. However, maintaining charred timber cladding requires specific care depending on the level of charring: light, medium, or heavy. Here’s a detailed guide on how to maintain each type, including the tools and techniques you’ll need.

Light Charred Timber
Characteristics: Light charred timber has a subtle charred surface that retains much of the wood's natural colour and grain. It offers moderate protection against weather and pests.
Maintenance Requirements:
Cleaning: Use a soft brush or cloth to remove dust and debris. Avoid harsh chemicals that could damage the surface.
UV Sealer: Apply the UV Sealer that comes with your material when first ordered or contact the supplier for additional UV Sealer. This will help to maintain the wood’s appearance and protect it from moisture.
Inspection: Regularly inspect for signs of wear or damage, such as cracks or fading, and address them promptly.
Tools and Techniques:
Soft Brush: For gentle cleaning without scratching the surface.
UV Sealer: Manufacturer supplied.
Cloth: Use a soft brush for applying evenly.

Medium Charred Timber
Characteristics: Medium charred timber has a more pronounced charred layer, offering enhanced protection and a darker, more uniform appearance.
Maintenance Requirements:
Cleaning: Use a soft-bristled brush to clean the surface. Avoid power washing, as it can strip the charred layer.
Re-sealing: Apply every 1-2 years or as required, depending on exposure, to maintain the finish and protect against harsh weather.
Repair: Address any chips or scratches with a sealer to the area to avoid the surrounding area being compromised.
Tools and Techniques:
Soft-Bristled Brush: Ideal for removing dirt without damaging the charred surface.
UV Sealer: For use on minor repairs.

Heavy Charred Timber
Characteristics: Heavy charred timber features a thick, carbonised layer that provides maximum protection and a deep, blackened appearance.
Maintenance Requirements:
Cleaning: Gently brush the surface to remove loose soot and debris. Avoid abrasive tools that could remove the charred layer.
UV sealer: Heavy charred timber requires less frequent sealing, typically every 2-3 years, to maintain its appearance.
Monitoring: Regularly check for any signs of degradation, especially in high-exposure areas.
Tools and Techniques:
Gentle Brush: Use a very soft brush to clean without disturbing the charred layer.
UV Sealer: Use sparingly to preserve the wood’s finish.
Visual Inspection: Regular checks help catch potential issues early.
General Tips for All Charred Timber
Avoid Harsh Chemicals: Use mild, natural cleaning products to prevent damage.
Do not use a jetwash or jet nozzle on a hose on any charred surface.
Protect from Excessive Moisture: Ensure proper drainage and ventilation to prevent water accumulation.
Regular Maintenance: Regular visual inspections and subsequent care will prolong the aesthetic beauty of your charred timber cladding.
Please remember: Timber is a natural product, and therefore, some TLC will pay you back for many years. After all, your other big investments, like a car, get cleaned every week or serviced every six months, along with a host of other man-made products that you don’t think twice about getting serviced or replaced.
Maintaining charred timber cladding requires understanding the unique needs of light, medium, and heavy charred finishes. By following these guidelines and using the appropriate tools and techniques, you can preserve the striking appearance and durability of your charred timber for years to come. Whether you prefer the subtlety of a light char or the boldness of a heavy char, proper maintenance is key to enjoying the full benefits of this beautiful and resilient material.
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