Thermowood Ash Windowsill - 123x33x4cm
Thermowood Ash Windowsill - 123x33x4cm
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A windowsill should do more than frame your view — it should stand up to sunlight, humidity, and daily life. Our Thermowood Ash windowsill combines clean, modern style with the long-lasting strength of thermally modified wood.
Why choose Swoye thermally-modified windowsill?
+ 65% more dimensionally stable than untreated wood — less warping, swelling, or shrinking
+ Naturally resistant to moisture and fungi thanks to thermal modification
+ Smooth, modern grain with rich, deep tones — no stains, no chemicals
+ Low maintenance – Just occasional cleaning and oiling
Technical Description
Technical Description
Material
+ Thermally Modified Ash Wood
+ Durability Class: 1 (25+ years’ protection against wood decay)
Class: AB
Finish: unoiled
Swoye’s Thermowood Ash is treated with heat and steam — no chemicals added. This process makes it up to 65% more dimensionally stable than regular wood and naturally resistant to moisture and fungi.
With deep, rich tones and refined grain, Thermowood Ash is perfect for kitchens and interiors exposed to high humidity — a beautiful, sustainable choice for conscious living.
Care Instruction
Care Instruction
1. Seal Before Installation
Apply a protective oil or finish to all sides—including the underside—before mounting the windowsill to prevent moisture absorption from walls or condensation.
2. Clean with Care
Dust regularly and wipe with a soft cloth and mild soap if needed. Avoid harsh cleaning agents or excessive water.
3. Protect from Standing Water
Do not allow flowerpots or other items to leak or trap water on the surface. Use trays or felt pads to protect the finish.
4. Reapply Oil as Needed
Depending on sunlight exposure or humidity levels, re-oil the surface once or twice a year to keep it in good condition.
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Thermowood Precision for Easy Fit to your window
Each windowsill is milled to exact dimensions, making installation straightforward in both new builds and replacements. Standard tools and brackets are all you need.
Thermowood Resistance to Moisture and Heat
Thermal modification makes the ash wood stable against humidity and temperature swings. Ideal near radiators, open windows, or damp rooms like kitchens and bathrooms.
Solid Thermowood Build for Stable Window Spaces
With 3.2–4 cm thickness, these sills offer lasting support for plants, lighting, or storage. They won’t warp or crack under normal indoor conditions.
Dark Thermowood Color That Lasts
The rich brown tone runs through the full depth of the wood — not just the surface. It keeps a consistent, natural look that works in both modern and rustic interiors.
Shipments within EU
Ethically sourced
Exceptional value
Bring back the warmth of nature
WITH SWOYE
