Support Spacing
Use furring at least 3/4 inch thick and no more than 24 inches on center; confirm final spacing for the profile.
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Architectural Cladding · Division 07 46 23 · Issaquah project guide
Thermo Ayousfor Siding & Cladding.
Thermo Ayous (Triplochiton scleroxylon) is the lightweight, clear-grain hardwood option in the Maximo collection. Its S4S, V-joint and Fluted #5 profiles support smooth contemporary surfaces, while the thermal process reduces moisture response compared with untreated wood.
APPLICATION SYSTEMThermo Ayous · Siding & Cladding
450Janka Hardness
24.0Dry Density
Verify ProductDurability Rating
20 YearMaximo Warranty
Hardware & Nails
Exterior-grade stainless steel nails or screws where allowed by the current profile instructions.
Sub-framing Details
A drained wall assembly with coordinated flashings and a ventilated space behind the cladding.
Air Cavity Specs
Keep drainage and airflow continuous and protect openings from insects without blocking ventilation.
Material & assembly planning
Key advantages &
installation rules.
Clear-Grain Aesthetic
A smooth, quiet face supports contemporary walls, ceilings and detailed profiles.
Lightweight Handling
Its relatively low density can make overhead work and long-board handling easier than denser hardwoods.
Fluted & Textured Profiles
Fluted #5 and V-joint options create distinct shadow lines with cataloged dimensions.
Assembly Guidelines for Siding & Cladding:
- Install over a minimum 3/4" continuous drained rainscreen.
- Use sharp, high-tooth carbide blades to ensure clean, fiber-free cuts.
- Apply end-grain sealer to all field cuts immediately.
Reduced tangential movement supports more consistent joints through seasonal changes.
Thermal modification reduces moisture uptake and changes nutrients used by decay fungi; confirm the rating for the selected profile.
Real wood modified without added wood-preservative chemicals.
Consultation and order coordination through BFS Issaquah.
Cataloged Profiles
3 Profiles available for
Thermo Ayous siding & cladding.
1x6S4S E4ELightweight, smooth and evenly toned for clean siding, ceiling and wall installations.Compare profile →
1x6V-Joint / Nickel GapA crisp tongue-and-groove profile that creates controlled shadow lines with easy handling.Compare profile →
1x6Fluted #5A rhythmic fluted surface that adds texture while keeping Ayous light and workable.Compare profile →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
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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.
Frequently Asked Questions
Thermo Ayous · Siding & Cladding
How does Thermo Ayous perform in wet Pacific Northwest winters?+
Thermal modification lowers the equilibrium moisture content of Ayous compared with untreated lumber. This can reduce seasonal movement, while drainage, ventilation, fastening and maintenance still determine the performance of the complete assembly.
Product and installation references