Elevate your exterior design with the rich character and enduring strength of Thermo Ash D4 SG Cladding by Thermory, available at WonderWoods. Made from sustainably sourced American ash and treated with Thermory’s chemical-free thermal modification process, this cladding offers premium durability with a refined, modern finish.

The D4 SG (slender gap) profile features a clean, narrow shadow line that adds subtle depth and sharp architectural definition to any façade. With its deep, chocolate-brown tones and pronounced grain patterns, Thermo Ash provides a sophisticated natural look that enhances both contemporary and traditional designs.

Thermal modification significantly improves ash’s stability and resistance to rot, moisture, and insects—making it an ideal choice for challenging outdoor conditions. Over time, it weathers to an elegant silver-grey patina or can be oiled to preserve its rich color.

Whether for residential or commercial projects, Thermo Ash D4 SG delivers beauty, resilience, and lasting impact.