Is any pressure-treated post suitable for a fence?
FENCING · OCTOBER 9, 2026 · SLATE & SPAN
No. If a wooden post will be buried, check that the supplied material is suitable for ground contact. “Pressure treated” by itself is not a complete specification, and a stain or surface coating does not establish that rating.
Planning a project?
Tell Slate & Span your city and what you have in mind.
Check the tag before installation
A homeowner planning a fence asked about wood posts, gravel and concrete. Before choosing the backfill, settle which post material will be used and whether its stated use matches the site. Do not assume a wood species name answers that question.
For a new wooden fence, start with the fence estimator to plan the length, height and standard wooden gates. Confirm the post specification when the scope is reviewed.
Ready to discuss the details?
Share a few photos and your priorities with Slate & Span.
Ask for a written specification
AWPA’s homeowner guidance says ground-contact applications need Use Category UC4A or higher for preservative-treated wood. Ask to see the end tag or treatment documentation, and keep a photograph with your project records. Lumber labeled only for above-ground use is a different product.
Ask the contractor to explain the post size, spacing, footing and drainage approach for your fence and soil. A material rating does not determine the whole installation. Get any substitutions approved before the posts go in; compare specifications when comparing quotes, rather than looking only at the fence length.
Replacing an existing run? Use our wooden fence estimate tool for the new fence and standard gates, then discuss the site details with us. Post-only repairs need a separate assessment and are not priced by the tool.