Imperial & Metric Net
3/4" x 5-1/2" (19 mm x 140 mm)
THERMOStart your projectGet a quoteBUILDERS FIRSTSOURCE · ISSAQUAHGet a local Maximo consultation
Thermo Clear Radiata · Maximo 2026 Collection
1x6Nickel Gap / Square Back.
Thermo Clear Radiata 1x6 Nickel Gap / Square Back is a cataloged Thermo Clear Radiata profile modified with heat and steam. Thermal modification lowers moisture uptake and improves dimensional stability compared with untreated lumber. Maximo lists a 20-year warranty; confirm current terms and approved applications for the selected product.
REAL PROJECT · COLLECTION INSPIRATIONThermo Clear RadiataSee the catalog below for the exact profile.
3/4" xNet Finished Size
ConfirmCoverage from project layout
ProjectSpecific waste allowance
20 YearMaximo warranty
Milling Details
Nickel Gap / Square Back
Installation Protocol
Maximo strongly recommends screw fastening outdoors, particularly for Thermo Clear Radiata and Scandinavian Thermo. Use the stainless steel system specified for the selected assembly. · Maximo recommends pre-drilling for all fasteners; confirm the bit, fastener and edge distance for the selected profile
Catalog Applications
Siding & Cladding · Ceilings & Soffits
From the Maximo project library
From the board to the whole space.
A continuous line to the horizon
A real project from the Clear Radiata album. The photograph does not establish a finish or weathering timeline.
The grain, up close
Board detail from the Clear Radiata album; not a drawing or sample of a specific catalog profile.
Dark tone. Visible texture.
Light reveals the texture even within a dark material palette.
Real projects, not exact-profile samples. Confirm the species, application and finish for your project.
Profile & surface planning
Milled for repeatable lines &
project-ready details.
A clear, uniform softwood profile designed for minimal knots and precise shadow lines. High-temperature thermal modification reduces the board’s moisture response compared with the same species untreated.
Finish & Maintenance Recommendations:
Choose a compatible exterior finish when color retention is desired, and confirm factory-prefinish options with the dealer. If left unfinished, the surface will gradually weather toward silver gray; timing and uniformity vary with exposure and detailing.
Lower moisture uptake helps reduce seasonal movement across board joints.
No added synthetic wood preservatives in the thermal process.
Reduced movement supports more predictable joints when the profile is installed correctly.
Available by consultation through Builders FirstSource Issaquah.
The installation detail
Thermo Clear Radiata.
Details that matter.
Beautiful surfaces start with the right board, the right joint and the right support. Here is how this profile fits into the plan.
Your profile
1x6
Nickel Gap / Square Back
CATALOG CROSS-SECTION
Original catalog artwork. Enlarged for clarity, not to scale. Use the approved detail for installation.
A different edge detail.
Radiata’s Nickel Gap / Square Back has its own stepped geometry. It is not the Ayous tongue-and-groove detail.
Exterior work. Stainless screws.
Maximo strongly recommends screw fastening outdoors, particularly for Thermo Clear Radiata and Scandinavian Thermo. Use the stainless steel system specified for the selected assembly.
A wall that can dry.
For siding, Maximo calls for furring secured to studs and ventilation behind the boards. Coordinate the drainage path, openings and clearances with the wall design.
Side-by-Side Comparisons
Compare Thermo Clear Radiata 1x6 Nickel Gap / Square Back
against traditional Pacific Northwest woods.
Fine, generally straight grain with a pale, quiet appearance.
Straight vertical grain selected for a consistent, premium visual rhythm.
Warm color variation, recognizable grain and a strong regional design tradition.
Strong contrast between earlywood and latewood with a distinctly regional character.
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.
YOUR SELECTIONThermo Clear Radiata 1x6 Nickel Gap / Square Back
Model FAQs
Thermo Clear Radiata 1x6 Nickel Gap / Square Back
project questions
What net size does the Maximo catalog list for Thermo Clear Radiata 1x6 Nickel Gap / Square Back?+
The 2026 catalog lists 3/4" x 5-1/2" (19 mm x 140 mm nominal metric equivalent). Confirm current production tolerances and available lengths when ordering.
What is the recommended fastener for Thermo Clear Radiata 1x6 Nickel Gap / Square Back?+
Maximo strongly recommends screw fastening outdoors, particularly for Thermo Clear Radiata and Scandinavian Thermo. Use the stainless steel system specified for the selected assembly. Confirm preparation, fastener size and penetration with Maximo. For ceilings and soffits, request a separate overhead support and fastening schedule.
How much waste should I calculate when ordering Thermo Clear Radiata 1x6 Nickel Gap / Square Back?+
Waste depends on available lengths, wall or deck geometry, joint layout, appearance matching and field cuts. Ask the Issaquah team to review the takeoff before ordering.
Product documents & submittals