Siding & Cladding
Thermally modified wood, Brazilian hardwood, and composite cladding — milled to your profile and delivered from nine branches. Facades that hold their line for decades.
Heat-treated. Chemical-free. Ultra stable.
Thermally Modified Ayous
Featherweight Boards. Razor-Straight Facades.
Scandinavian Thermally Modified Wood
Nordic Character, Engineered for the Coast.
Thermally Modified Ash
Hardwood Depth with Modified Stability.
Maximo Accoya
Modified Wood for Stable, Long-Life Facades.
Six species, one standard.
Ipe
The Benchmark for Rainscreen Facades.
Cumaru
Bold Grain. Brutal Strength. Built for Impact.
Garapa
Golden Tone, Contractor-Friendly Price.
Angelim
The Structural Workhorse for Big Walls.
Jatoba
Brazilian Cherry, Deep Red Facades.
Tigerwood
Dramatic Figure for Statement Walls.
Shiplap, tongue-and-groove, rainscreen, channel gap — we mill every siding profile to spec from our own inventory, on your timeline.
Norx — wood-look wall systems with low routine maintenance.
Wall and cladding brands professionals rely on.
Thermally Modified Wood vs the alternatives.
| Thermally Modified Wood | Autoclave Treated | Kiln-Dried | Other Untreated | |
|---|---|---|---|---|
| Treatment method | Heat + steam only | Pressure chemicals | Heat drying | None |
| Chemical-free | Yes | No | Yes | Yes |
| Moisture absorption | Very low | Moderate | Moderate | High |
| Dimensional stability | Ultra stable | Fair | Good | Poor |
| Rot & decay resistance | Class 1–2 | Class 2–3 | Species dependent | Low |
| Insect resistance | High | High | Species dependent | Low |
| Resin bleed | None — resins removed | Possible | Possible | Likely |
| Color consistency | Through the board | Surface tint | Natural variation | Natural variation |
| Warranty | Up to 20 yr | 10–15 yr | Varies | None |
| Best use | Siding, ceilings, saunas | Ground contact, framing | Interior, millwork | Temporary work |
See the material on real facades.
Tell us about the build.
Premium siding with project support coast to coast.
Lumber Plus supplies siding and cladding for residential and commercial facades across North America. Our material program includes thermally modified Ayous, Scandinavian pine, and ash to the full range of Brazilian hardwoods — Ipe, Cumaru, Garapa, Angelim, Jatoba, and Tigerwood — plus Norx composite cladding for low-maintenance builds.
Every board is milled in-house to the profile your project calls for: shiplap, tongue-and-groove, rainscreen, and channel-gap systems in any dimension. Thermally Modified Wood carries a 20-year warranty and moves less than half as much as kiln-dried stock, which keeps gap lines straight through humid summers and freeze cycles alike.
With nine branches from Miami to Boston, architects and contractors get local help coordinating siding, soffit, trim and fasteners. Request a quote so the nearest branch can confirm current profiles, availability and delivery timing.
Job-site intel, monthly.
New species arrivals, clearance lots, and project updates — no noise.