- 5728 East Lake Sammamish Parkway SE Issaquah, WA 98029
- 425.392.3631
- sales@issaquahlumber.com
From classic to contemporary, our wood siding options, including lap, tongue-and-groove, vertical, shakes, and shingles, deliver natural beauty and long-term performance.
At Issaquah Lumber, our siding materials are chosen for their long-term stability, weather performance, and elevated architectural appeal they bring to any project.
We specialize in custom-milled siding profiles, from modern cladding styles to timeless bevel, shiplap, and standard profiles. All offered in random lengths and consistent widths and thicknesses. For ease of installation, our products work seamlessly with the GRAD System.
Finish your siding the way you want it—select from factory-prefinished options, or choose stain, paint, oiled, brushed, or charred treatments to achieve the look and protection your project calls for.
Issaquah Lumber’s thermally modified wood siding is crafted through a heat-and-steam process that requires no chemical additives. This modification enhances stability and durability while enriching the wood’s natural color.
Ideal for homeowners and builders seeking sustainable siding options, thermally modified Ash, Poplar, and Southern Yellow Pine resist decay, mold, and moisture absorption while offering a refined, contemporary appearance.
ThermoWood®, supplied by Issaquah Lumber, is a trusted, Finnish-developed modified wood known for its consistent quality from selected and qualified manufacturers. Sustainably sourced wood is manufactured using only controlled heat and steam, transforming it to improve weather resistance, durability, and dimensional stability.
Available in Nordic Pine, Radiata Pine, and Red Oak, ThermoWood siding delivers a beautifully uniform tone, longevity, and a modern aesthetic suitable for both residential and commercial exteriors.
Issaquah Lumber offers a curated selection of natural wood siding species known for their warmth, workability, and timeless architectural appeal. Our options include Western Red Cedar, CVG Hemlock, and CVG Douglas Fir—all Pacific Northwest softwoods valued for their consistent grain and enduring performance.
Versatile and easy to finish, these natural species accept stain, oil, or transparent coatings beautifully and age gracefully over time. For projects that prioritize authentic beauty and proven performance, our natural wood siding provides a sustainable choice that stands the test of time.
