THERMOStart your projectThermally modified wood · Issaquah, Washington
Compare 21 Maximo Thermo profiles with cedar, hemlock and Douglas fir—then talk to the local team at Builders FirstSource Issaquah.
Heat + steam
No added wood preservatives.
Defined profiles let architects coordinate decking, ceilings, cladding and trim while keeping the specification conversation tied to a published catalog.
V-joint, nickel-gap, fluted and S4S profiles create different shadow, fastening and installation requirements.
Why professionals are switching
Traditional lumber can be an excellent material—but grade, moisture, heartwood content and supply all influence the result. Maximo Thermo uses a controlled heat-and-steam process to make performance more consistent from board to board.
Heat · steam · controlled transformation
Thermal modification changes how real wood responds to moisture. As you move through this section, the boards settle into a more controlled architectural rhythm.
The process raises temperature up to 215°C under steam protection.
Steam prevents burning and removes moisture-attracting hemicellulose.
The transformed material becomes a defined catalog profile ready for specification.
Drag to compare
This visual is illustrative, not a grade sample. Use it to frame the specification conversation: profile, moisture, grain, finish, installation and documented warranty.
Weathering preview
Select a species and move the slider to preview a possible shift from the factory brown tone toward silver gray. This is a visual aid, not a timeline or color guarantee.
Reference view of the deeper brown tone produced by high-temperature thermal modification through the board.
No modeled outdoor exposure at this starting point.
Project guidance
Practical guidance for installing and maintaining Maximo thermally modified siding, soffits, decking and trim, including storage, ventilation, fasteners and finish care.
Open guide →Compare controlled factory prefinishing with jobsite finishing for thermally modified wood, including coverage, curing, touch-up and maintenance planning.
Open guide →Understand how heat and steam change wood moisture response, dimensional stability and decay resistance—and what proper installation still needs to provide.
Open guide →Plan a responsible fire and WUI review for thermally modified wood using product-specific test reports, assembly details and local code approval.
Open guide →Plan environmental documentation for Maximo thermally modified wood, including sourcing, heat-and-steam processing, carbon reporting and LEED submittals.
Open guide →Side-by-side
A representative comparison for siding, ceilings and architectural details in the Puget Sound region.
See the full comparisonMoisture response
Thermally modified for lower moisture uptakeVaries by species, cut, grade and conditioningBiological durability
Class 1 or 2, depending on the Maximo productVaries by species, heartwood, sapwood and treatmentWarranty
20-year Maximo manufacturer warrantyNatural wood is commonly sold without product warrantyInstallation
Lightweight, pre-dimensioned & stableMovement and weight vary by materialIssaquah wood guides
Grade, moisture, exterior protection and where Thermo profiles can support longer service.
Premium grain selection, heartwood, availability and profile-specific alternatives.
Regional familiarity, natural variation, maintenance planning and Maximo comparisons.
Strength, grain contrast, exterior detailing and durable Thermo design options.
Eastside & Puget Sound project areas
Builders FirstSource Issaquah can coordinate product consultation and orders. Confirm availability, delivery options, schedule and fees for the project address.
Bellevue projects range from Lake Washington shoreline properties to exposed hillside neighborhoods.
Explore Bellevue guide →Sammamish Plateau sites can combine tree cover, shaded elevations and extended wetting.
Explore Sammamish guide →Sammamish River valley micro-climate featuring winter ground frost, autumn morning fog, and heavy UV exposure on open East Sammamish and Education Hill elevations.
Explore Redmond guide →Lake Washington shoreline and rooftop projects can experience wind-driven rain and strong sun exposure.
Explore Kirkland guide →Surrounded by Lake Washington with continuous ambient humidity, shoreline winds, and mature forested residential parcels.
Explore Mercer Island guide →Marine climate with frequent light rainfall, cloudy overcast winters, and dense urban micro-climates in neighborhoods like Madison Park, Queen Anne, Magnolia, and West Seattle.
Explore Seattle guide →Foothill projects may experience frequent rain, snow, cold conditions and exposed elevations.
Explore Snoqualmie guide →Valley micro-climate with intense summer sun, agricultural valley breezes, and damp river-basin humidity in autumn and winter.
Explore Woodinville guide →
Local search · Issaquah
Use the local guide to understand what to bring to the conversation: model, profile, application, estimated area and project timeline. Availability and lead time are always confirmed directly with Builders FirstSource Issaquah.
Explore the Issaquah lumber yard guideWhere to buy
5210 E Lake Sammamish Pkwy SE
Issaquah, WA 98029
