THERMOStart your projectHardwood · Local material consultation
Ash in Issaquah, WA
Ash and Thermo Ash share a species reference but should not share an undifferentiated purchase order. For Issaquah exterior projects, Maximo Thermo Ash adds a controlled thermal process and a cataloged profile selection to the hardwood conversation.
Untreated ash versus Maximo Thermo Ash
What to specify
before you order.
An untreated ash order may be intended for furniture, interior flooring or machining. A Maximo order identifies the thermally modified product and its finished profile. Include the complete product name on the quote so a nominal board size cannot be mistaken for an equivalent untreated board.
The purpose of comparing these products is to address the exterior assembly directly. On an Issaquah deck or facade, specify the modified board, support, drainage and fastening together. Do not use a hardwood species name as a substitute for the selected product’s installation instructions.
Ash & Thermo Ash
Bring Maximo
into the comparison.
Thermo Ash is the clearest direct example of the Maximo proposition: real ash transformed with heat and steam for lower moisture response and enhanced durability. The catalog lists end-matched 1x6 Plus and 5/4x6 products, along with other sizes for defined applications. Select the application first, then the profile.
For your Issaquah quote, identify which surface is siding, ceiling, decking or trim. The profiles below link to catalog dimensions and valid applications, helping the local team discuss a specific product with you.
Explore Thermo AshThe prefinish decision
Approve the finish.
Plan the installation.
Thermal modification changes the base color; a coating determines the intended finished appearance and care routine. Review a natural and a coated Thermo Ash sample with BFS Issaquah, then include the approved finish and field-cut treatment in the order.
Include finishing in the quote
Ask which factory-prefinished options are available for the selected Maximo SKU. Record the color, sheen, coating system, field-cut treatment and care instructions. Compare that package with the labor, access and scheduling needed for onsite finishing.
Plan your prefinished packageMaximo profiles to discuss
Thermo Ash
for the right surface.
1x6 Plus S4S E4E End Match
A dense thermally modified hardwood with pronounced grain and a deep, architectural tone.
Profile & applications →
5/4x6 S4S E4E End Match
A substantial end-matched board built for bold surfaces and high-use exterior spaces.
Profile & applications →
2x4 S4S E4E
Hardwood strength and dimensional stability in a versatile structural-looking profile.
Profile & applications →
2x6 S4S E4E
A broad, solid profile with strong grain for decking, trim and architectural details.
Profile & applications →
1x10 S4S E4E
A wide hardwood trim board for fascia, frames and refined exterior transitions.
Profile & applications →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.
Before ordering
Ash
project questions.
Is all ash sold as Thermo Ash?+
No. Request the Maximo thermally modified product by its full name and profile. Untreated ash lumber is not the same specification.
What should I send for a ash and Maximo comparison in Issaquah?+
Include the intended surface, approximate area, desired board appearance, finish preference and project timeline. Mention Ash in your brief. We record your contact details and the wood you are comparing so our team can coordinate a relevant Maximo consultation with BFS Issaquah.
Where do I ask about buying Thermo Ash locally?+
Contact Builders FirstSource Issaquah at (425) 391-8000, 5210 E Lake Sammamish Pkwy SE, Issaquah, WA 98029, or use our request form. Confirm your selected Maximo profile, availability, finish options and lead time before ordering.
Does this page confirm ash inventory at BFS?+
No live inventory is shown. Ash is discussed as a material comparison; the local buying consultation here concerns Maximo Thermo. Ask BFS separately about any traditional lumber you need.
Related wood choices
Compare another material.
References for your specification