Imperial & Metric Net
1" x 5-1/2" (25 mm x 140 mm)
THERMOStart your projectBUILDERS FIRSTSOURCE · ISSAQUAHGet a local Maximo consultation
Thermo Clear Radiata · Maximo 2026 Collection
5/4x6S4S E4E.
Thermo Clear Radiata 5/4x6 S4S E4E 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.
MAXIMO PROFILEThermo Clear Radiata 5/4x6 S4S E4E
1" xNet Finished Size
ConfirmCoverage from project layout
ProjectSpecific waste allowance
20 YearMaximo warranty
Milling Details
Surfaced four sides with eased edges (S4S E4E)
Installation Protocol
Use corrosion-resistant stainless steel fasteners sized for the profile and approved assembly; follow current Maximo installation guidance · Maximo recommends pre-drilling for all fasteners; confirm the bit, fastener and edge distance for the selected profile
Catalog Applications
Decking
Profile & surface planning
Milled for repeatable lines &
project-ready details.
Smooth, consistent decking with thermally enhanced stability and approachable weight. 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.
Profile & Installation Planning
Read the profile before
choosing the fastening method.
The 2026 catalog lists Thermo Clear Radiata 5/4x6 S4S E4E as S4S E4E. This simplified view helps explain the board relationship; it is not a scaled CAD detail or a substitute for the current installation guide.
Square-edge S4S E4E
S4S/E4E boards do not inherently create a tongue-and-groove lock. Joint spacing, exposure and fastening belong to the project assembly.
Fastening is assembly-specific
Confirm fastener material, gauge, length, edge distance and placement for the selected profile and substrate. Concealed fastening should not be assumed for every SKU.
End match only where listed
Only the cataloged Thermo Ash 1x6 Plus and 5/4x6 products are identified as End Match. No universal off-framing rule or fixed waste reduction is claimed.
Side-by-Side Comparisons
Compare Thermo Clear Radiata 5/4x6 S4S E4E
against traditional Pacific Northwest woods.
VS. TRADITIONALvs. Hemlock VGCompare durability, moisture, and warrantyOpen comparison sheet →
VS. TRADITIONALvs. VG CedarCompare durability, moisture, and warrantyOpen comparison sheet →
VS. TRADITIONALvs. Western Red CedarCompare durability, moisture, and warrantyOpen comparison sheet →
VS. TRADITIONALvs. Douglas FirCompare durability, moisture, and warrantyOpen comparison sheet →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 5/4x6 S4S E4E
Model FAQs
Thermo Clear Radiata 5/4x6 S4S E4E
project questions
What net size does the Maximo catalog list for Thermo Clear Radiata 5/4x6 S4S E4E?+
The 2026 catalog lists 1" x 5-1/2" (25 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 5/4x6 S4S E4E?+
Use the corrosion-resistant stainless steel fastener specified for the profile, exposure and supporting assembly. Confirm fastener type, length and pre-drilling with the current Maximo installation guide.
How much waste should I calculate when ordering Thermo Clear Radiata 5/4x6 S4S E4E?+
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