Thermally Modified Ash Lumber and Boards

Thermally Modified Ash for specified interior and exterior board applications. Heat treatment gives the wood a darker color and requires product-specific installation guidance for the intended use.

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About Thermally Modified Ash

Thermally Modified Ash is heat-treated for a darker color and different movement in service than conventional Ash — a separate product for specified board applications.

Timberline quotes it by intended use, profile, dimensions, and finish. Confirm suitability with the quote, then pick up in Black Mountain or request delivery.

Where it works well

Thermally Modified Ash is a separate material choice for projects seeking a darker appearance. Tell us whether the boards are for interior or exterior use, along with the profile, dimensions, finish, and quantity.

See the milling shapes we typically sell on our profiles guide. Custom patterns are available when the run fits — tell us what you need on the quote.

What heat treatment changes

Heat treatment gives Ash a darker appearance. It is part of the material, not a surface finish, and it does not replace the project specification. Confirm the intended use, profile, fastening, and finish with the quote. Conventional Ash is listed under Related.

Grades and appearance

Thermally Modified Ash product listings include Clear grades. The grade depends on the selected product and dimensions.

Include the grade from your plans or the product you want to match. We will confirm the grade, dimensions, and availability with your quote.

Pickup and delivery

Pickup is available at our Black Mountain, NC lumber yard. To request regional delivery, include the job ZIP, timing, and access or unloading notes on the quote form.

Milling profiles

Click a profile for a closer look, then continue in Build a quote or Plan coverage with that milling selected.

Illustrations show milling shape, not a species sample. End-view icons match our catalog browse drawings. See also our profiles guide.

Build a quote

Start by picking a size and adding boards — the same quote path as our catalog. Prefer to plan coverage from room dimensions? Switch to Plan coverage.

Yard sizes are listed first. Prefer the full page? Open Build a quote.

Pick a size. Yard-available sizes are listed first when known; other sizes are sourced when we quote. Pricing and availability are confirmed with your quote.