Forest Management
West African hardwood sources; request order-specific certification and chain-of-custody documentation when required.
THERMOStart your projectGet a quoteBUILDERS FIRSTSOURCE · ISSAQUAHGet a local Maximo consultation
Modern collection · Triplochiton scleroxylon
Modern.Thermo Ayous.
Quiet grain. Clean lines. A lightweight hardwood for expressive siding, ceilings and soffits. 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
Modern · Thermo Ayous
See the character.
Imagine the possibilities.
Modern collection · Thermo Ayous
Considering hemlock or cedar?
Meet your Ayous alternative.
Compare the complete specification—not just the species name.
| What matters | Maximo Thermo Ayous | Hemlock / VG Cedar |
|---|---|---|
| Moisture response | Thermal modification reduces moisture uptake and swelling compared with untreated Ayous. | Review species, grade, moisture content and installation conditions. |
| Weight & handling | Lightweight wood suited to siding, ceilings and soffits. | Compare the weight and handling of the actual supplied material. |
| Appearance | Warm tone and quiet grain; real boards retain natural variation. | Hemlock and cedar offer their own grain, cut and color characteristics. |
| Warranty | 20-year limited Maximo warranty, subject to current product terms. | Ask the supplier for the exact warranty included with its product. |
| Price & availability | Request a current BFS Issaquah quote for the profile and finish. | Compare equivalent grades, lengths, finishing and delivery terms. |
Based on Maximo’s Ayous comparison sheet (August 19, 2025). Pricing, supply and warranty terms require a current product-specific review.
Modern collection · Plan your finish
Choose the wood.
Plan the finish before installation.
Ask about factory prefinishing to coordinate color, coating coverage and installation timing before boards reach the jobsite. Confirm the available system, samples, lead time and cut-end touch-up requirements with BFS Issaquah.
Natural grain and color variation are part of real wood. Review several boards together, plan the layout and agree on an approved sample before placing your order. Confirm the supplied lengths and plan joints before cutting to make the most of each board.
Explore prefinishingVerifyDurability 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.
From the Maximo project library
Natural character. At every scale.
A ceiling worth looking up to
Wood-lined planes frame the room and its central chandelier.
The outdoor room, finished overhead
The ceiling carries the warmth of wood through the outdoor entertaining area.
From the kitchen to the garden
An indoor-outdoor view shows the ceiling, trim and garden connection together.
Real projects, not exact-profile samples. Confirm the species, application and finish for your project.
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
- For grooved Ayous siding, Maximo allows concealed stainless steel nails installed with a nail gun; confirm the SKU and fastening schedule
- 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.