Forest Management
Plantation-grown Radiata Pine; request order-specific certification when required.
THERMOStart your projectBUILDERS FIRSTSOURCE · ISSAQUAHGet a local Maximo consultation
Botanical: Pinus radiata (Clear Grade) · Maximo Collection
Thermo Clear RadiataProfile by profile.
Thermo Clear Radiata is selected for a clear, uniform surface that supports the sleek lines associated with vertical grain cedar and hemlock. The collection includes Nickel Gap and wide S4S trim profiles up to 1x12 nominal.
MAXIMO SPECIESThermo Clear Radiata · 5 catalog profiles
Class 1/2Durability class
500Janka hardness
27.0Installed density
20 YearLimited warranty
Moisture Movement
Tangential: 1.3% | Radial: 0.8% · Equilibrium moisture: 5.5%
Thermal Conductivity
λ = 0.10 W/(m·K) · Confirm assembly-level energy calculations with the project designer.
Aesthetic Character
Selected clear architectural grade with smooth, uniform grain and warm golden-brown coloration.
Machining, fastening & finishing
Precision fabrication &
long-term surface care.
Thermal modification changes the way wood machines and responds to moisture. Use sharp tools, support the board near the cut and follow the current Maximo fastening and finish guidance for Thermo Clear Radiata.
Machining & Fastening Guidelines:
- Sharp, well-maintained tooling for clean shadow lines and nickel-gap reveals
- Exterior-grade stainless steel fasteners selected for the profile and substrate
- Treat field cuts and exposed end grain according to the finish and installation guidance
Recommended Finish Systems:
- Penetrating clear or tinted exterior oils with UV inhibitors
- Compatible factory-prefinished coating options, subject to confirmation
High-temperature processing reduces volatile resins; inspect and finish for the intended exposure.
Thermal modification changes the wood through its cross-section rather than creating a surface-only stain.
Request order-specific certification when chain-of-custody documentation is required.
Documented product warranty for listed interior and exterior uses.
Available Thermo Clear Radiata Profiles
5 Cataloged models in
Thermo Clear Radiata.
Choose a profile to review dimensions, intended applications and side-by-side comparisons with Western Red Cedar, Hemlock and Douglas Fir.
5/4x6S4S E4E
2x6S4S E4E
1x8S4S E4E
1x12S4S E4EApplications for Thermo Clear Radiata
Plan the material by
architectural application.
APPLICATION GUIDE
Thermo Clear Radiata for Siding & Cladding
Profile options, fastening considerations and assembly questions for King County projects.
Open guide →APPLICATION GUIDE
Thermo Clear Radiata for Ceilings & Soffits
Profile options, fastening considerations and assembly questions for King County projects.
Open guide →APPLICATION GUIDE
Thermo Clear Radiata for Decking
Profile options, fastening considerations and assembly questions for King County projects.
Open guide →APPLICATION GUIDE
Thermo Clear Radiata for Trim & Moulding
Profile options, fastening considerations and assembly questions for King County projects.
Open guide →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.
Thermo Clear Radiata FAQs
Material &
project questions.
Why choose Thermo Clear Radiata over clear Western Red Cedar?+
Thermo Clear Radiata offers a cataloged clear profile with reduced moisture response and a product-specific warranty. Compare the exact cedar grade, dimensions, durability documentation, finish, price and lead time.
Is 1x12 Thermo Clear Radiata trim stable enough for wide fascias?+
Thermal modification reduces moisture-related movement, which can benefit wide trim. Correct acclimation, backing, fastener placement, flashing and finish remain necessary for a stable fascia assembly.
Product and installation references
Confirm performance for the exact species and profile using current manufacturer documents.