Forest Management
West African hardwood sources; request order-specific certification and chain-of-custody documentation when required.
THERMOStart your projectBUILDERS FIRSTSOURCE · ISSAQUAHGet a local Maximo consultation
Botanical: Triplochiton scleroxylon · Maximo Collection
Thermo AyousProfile by profile.
Thermo Ayous is a lightweight, clear-grain option for modern facades, fluted walls and ceilings. Its low density can simplify handling, while thermal modification improves dimensional stability and durability compared with untreated Ayous.
MAXIMO SPECIESThermo Ayous · 8 catalog profiles
VerifyDurability class
450Janka hardness
24.0Installed density
20 YearLimited warranty
Moisture Movement
Tangential: 1.1% | Radial: 0.7% · Equilibrium moisture: 4.8%
Thermal Conductivity
λ = 0.09 W/(m·K) (High natural insulation) · Confirm assembly-level energy calculations with the project designer.
Aesthetic Character
Clear, knot-free face with silky linear grain and warm golden-honey to medium caramel tones.
Machining, fastening & finishing
Precision fabrication &
long-term surface care.
Thermal modification changes the way wood machines and responds to moisture. Use sharp tools, support the board near the cut and follow the current Maximo fastening and finish guidance for Thermo Ayous.
Machining & Fastening Guidelines:
- Sharp, well-maintained tooling with the board fully supported
- Exterior-grade stainless steel trim screws or siding fasteners
- Plan safe handling and support for overhead installation
- Treat field cuts and exposed end grain according to the finish and installation guidance
Recommended Finish Systems:
- High-solids penetrating matte exterior oils
- Factory prefinished tinted coatings for rich tone preservation
- Interior clear finishes with project-required VOC documentation
High-temperature processing reduces volatile resins; inspect and finish for the intended exposure.
Thermal modification changes the wood through its cross-section rather than creating a surface-only stain.
Request order-specific certification when chain-of-custody documentation is required.
Documented product warranty for listed interior and exterior uses.
Available Thermo Ayous Profiles
8 Cataloged models in
Thermo Ayous.
Choose a profile to review dimensions, intended applications and side-by-side comparisons with Western Red Cedar, Hemlock and Douglas Fir.
1x6S4S E4ESiding & Cladding · Ceilings & SoffitsCompare profile →
1x6V-Joint / Nickel GapSiding & Cladding · Ceilings & SoffitsCompare profile →
1x6Fluted #5Siding & Cladding · Ceilings & SoffitsCompare profile →
1x8S4S E4ETrim & MouldingCompare profile →
1x10S4S E4ETrim & MouldingCompare profile →
2x2S4S E4ETrim & MouldingCompare profile →
2x4S4S E4ETrim & MouldingCompare profile →
2x6S4S E4ETrim & MouldingCompare profile →Applications for Thermo Ayous
Plan the material by
architectural application.
APPLICATION GUIDE
Thermo Ayous for Siding & Cladding
Profile options, fastening considerations and assembly questions for King County projects.
Open guide →APPLICATION GUIDE
Thermo Ayous for Ceilings & Soffits
Profile options, fastening considerations and assembly questions for King County projects.
Open guide →APPLICATION GUIDE
Thermo Ayous for Trim & Moulding
Profile options, fastening considerations and assembly questions for King County projects.
Open guide →Where to buy in Issaquah
Builders FirstSource Issaquah
Catalog available by consultation. Contact the Issaquah team to confirm availability, sample kits, and lead time for your selected Maximo profile.
Issaquah, WA 98029
(425) 391-8000
Monday–Friday, 7:00 AM–4:00 PMDealer information verified August 31, 2026. No in-stock claim is made on this site.
Request a local quote
Put this profile
on your project.
Tell us what you are building. Our team will review your wood selection and contact you to coordinate a Maximo consultation with Builders FirstSource Issaquah.
Thermo Ayous FAQs
Material &
project questions.
Why is Thermo Ayous so popular for modern architectural ceilings and soffits?+
Thermo Ayous combines relatively low density with a clear-grain appearance and cataloged fluted, V-joint and S4S profiles. Confirm support spacing, fastening and finish for the selected ceiling or soffit assembly.
Is Thermo Ayous suitable for exterior siding in Issaquah?+
Thermo Ayous has lower moisture-related movement than untreated lumber. Use the ventilation cavity, fasteners and spacing required by the project design and current Maximo installation guidance; no real-wood assembly is immune to movement.
Product and installation references
Confirm performance for the exact species and profile using current manufacturer documents.