Thermally Modified Siding &amp; Cladding .

Warm Ayous boards following a faceted ceiling above a shaded chandelier and white curtains

02 / APPLICATION

Ceilings

Bring warmth to the space overhead.

Pale wood-lined soffit above a wide waterfront veranda with white columns

03 / APPLICATION

Soffits

Carry the architecture beyond the walls.

Vertical fluted wood wall behind a green sofa, artwork and indoor plants

04 / APPLICATION

Walls

Create texture, depth and a focal point.

Horizontal wood privacy screen enclosing a landscaped garden seating area

05 / APPLICATION

Fences & screens

Create privacy with natural character.

Thermo Ayous1x6 S4S E4ELightweight, smooth and evenly toned for clean siding, ceiling and wall installations.View application details →

9Catalog profiles

Class 1 or 2Product-dependent durability

20 YearLimited Maximo warranty · Subject to terms

Heat + SteamNo chemicals added during thermal modification

SUBSTRUCTURE & SPAN

Sub-framing layout

Use furring at least 3/4 inch thick and no more than 24 inches on center; coordinate direction with cladding orientation.

VENTILATION CAVITY

Airflow & drying plane

Maintain a continuous drainage and ventilation path behind the siding.

FASTENING PROTOCOL

Corrosion resistance

Use exterior-grade stainless steel fasteners and the current profile-specific schedule; pre-drilling is recommended.

WATER MANAGEMENT

Moisture defense

Coordinate the water-resistive barrier, flashings, openings and insect protection without blocking airflow.

From the Maximo project library

Look closer. The details make the space.

Find your profile ↗

Real projects, not exact-profile samples. Confirm the species, application and finish for your project.

Pacific Northwest project planning

Detail for drainage,
drying & seasonal change.

For Puget Sound exterior walls, use a drained and ventilated rainscreen designed for the selected cladding and project conditions. Thermally modified wood’s lower moisture uptake can reduce swelling and shrinkage compared with untreated softwoods.

Thermal modification reduces moisture uptake and seasonal movement compared with the same species untreated. Tight joints, secure fasteners and finish life still depend on acclimation, correct installation, drainage and maintenance.

Open installation guide

LOWERMoisture expansion

Thermal modification reduces dimensional movement; compare product-specific data for the selected materials.

HEAT + STEAMHeat-and-steam process

Modified with heat and steam, without added wood-preservative chemicals or plastic resins.

PREFINISHConfirm current options

Ask BFS Issaquah about available colors, coverage, samples and field touch-up requirements.

DOCUMENTEDProduct-specific review

Use current catalog, warranty and installation documents for the exact profile.

Cataloged Maximo profiles

9 Profiles engineered for
siding & cladding.

Select a specific model to inspect dimensions, species characteristics, and compare side-by-side with traditional Pacific Northwest woods.

Modern · Thermo Ayous

Request a quote for this collection’s profile, lengths and finish.

Thermo Ayous1x6 V-Joint / Nickel GapA crisp tongue-and-groove profile that creates controlled shadow lines with easy handling.View application details →

Thermo Ayous1x6 Fluted #5A rhythmic fluted surface that adds texture while keeping Ayous light and workable.View application details →

Nordic · Scandinavian Thermo

Request a quote for this collection’s profile, lengths and finish.

Scandinavian Thermo1x6 V-Joint / Nickel GapStraight grain, characteristic knots and a clean Nordic tongue-and-groove expression.View application details →

Scandinavian Thermo1x6 Fluted #5Textured Nordic softwood with distinctive grain and a contemporary fluted face.View application details →

Scandinavian Thermo5/4x6 S4S E4EA versatile Nordic profile for clean horizontal or vertical surfaces and decking.View application details →

Heritage · Thermo Ash

Request a quote for this collection’s profile, lengths and finish.

Thermo Ash1x6 Plus S4S E4E End MatchA dense thermally modified hardwood with pronounced grain and a deep, architectural tone.View application details →

Thermo Ash5/4x6 S4S E4E End MatchA substantial end-matched board built for bold surfaces and high-use exterior spaces.View application details →

Cozy · Thermo Clear Radiata

Request a quote for this collection’s profile, lengths and finish.

Thermo Clear Radiata1x6 Nickel Gap / Square BackA clear, uniform softwood profile designed for minimal knots and precise shadow lines.View application details →

Side-by-side comparisons

Compare with traditional lumber
for siding & cladding.

Fine, generally straight grain with a pale, quiet appearance.

Vertical Grain Hemlock vs. Thermo Siding & Cladding

Familiar machining and a refined look when the grade and moisture are well controlled. Compare maintenance, moisture uptake, and warranty in Issaquah.

Straight vertical grain selected for a consistent, premium visual rhythm.

Vertical Grain Cedar vs. Thermo Siding & Cladding

Naturally durable heartwood and a long architectural track record in the Pacific Northwest. Compare maintenance, moisture uptake, and warranty in Issaquah.

Warm color variation, recognizable grain and a strong regional design tradition.

Western Red Cedar vs. Thermo Siding & Cladding

Naturally durable heartwood, low density and established exterior applications. Compare maintenance, moisture uptake, and warranty in Issaquah.

Strong contrast between earlywood and latewood with a distinctly regional character.

Douglas Fir vs. Thermo Siding & Cladding

High structural strength, broad familiarity and availability across common construction grades. Compare maintenance, moisture uptake, and warranty in Issaquah.