InstaBidsHow long does a wood fence last?
University of Georgia Extension’s 2022 garden-fencing guidance lists treated cedar posts at 20–25 years. Those figures describe posts only: the source says little information is available for wood fence panels. Its treated and untreated post figures differ by species, as shown in the table below.
Source: University of Georgia Cooperative Extension, Garden Fencing (2022), read 3 November 2026. Updated 2026-11-03
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In our own counts, n is the number of surveyed households behind a share and SE is its standard error, a measure of sampling error, in percentage points.
How long does a wood fence last?
University of Georgia Extension lists cedar posts at 15–20 years untreated and 20–25 years treated. Its garden-fencing publication separates these post estimates from fence panels, for which it reports little lifespan information.
You can describe the posts and panels in your wood fence project on InstaBids and compare written bids.
How long it lasts, by source
University of Georgia Extension lists pine, poplar, sycamore and sweet gum posts at 3–7 years untreated and 25–30 years treated. It lists redwood posts at 10–15 years untreated and 20–30 years treated.
| Type | Measure | Figure | Area | Data years | Source |
|---|---|---|---|---|---|
| Pine, Poplar, Sycamore, Sweet Gum posts, untreated | post life expectancy | 3–7 years | Georgia garden-fencing guidance | Full review December 14, 2022; data years not published | University of Georgia Cooperative Extension, Garden Fencing (2022), read 2026-11-03, n not published by the source. |
| Pine, Poplar, Sycamore, Sweet Gum posts, treated | post life expectancy | 25–30 years | Georgia garden-fencing guidance | Full review December 14, 2022; data years not published | University of Georgia Cooperative Extension, Garden Fencing (2022), read 2026-11-03, n not published by the source. |
| Cedar posts, untreated | post life expectancy | 15–20 years | Georgia garden-fencing guidance | Full review December 14, 2022; data years not published | University of Georgia Cooperative Extension, Garden Fencing (2022), read 2026-11-03, n not published by the source. |
| Cedar posts, treated | post life expectancy | 20–25 years | Georgia garden-fencing guidance | Full review December 14, 2022; data years not published | University of Georgia Cooperative Extension, Garden Fencing (2022), read 2026-11-03, n not published by the source. |
| Redwood posts, untreated | post life expectancy | 10–15 years | Georgia garden-fencing guidance | Full review December 14, 2022; data years not published | University of Georgia Cooperative Extension, Garden Fencing (2022), read 2026-11-03, n not published by the source. |
| Redwood posts, treated | post life expectancy | 20–30 years | Georgia garden-fencing guidance | Full review December 14, 2022; data years not published | University of Georgia Cooperative Extension, Garden Fencing (2022), read 2026-11-03, n not published by the source. |
| Double-diffusion-treated posts; exposure with no failures | field exposure without failures | 30 years | semiarid Central Plains near Nunn, Colorado | 1999 report; 30 years of field exposure | USDA Forest Service, Service life of fence posts treated by double-diffusion methods (1999), read 2026-11-03, n not published by the source. |
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For a wood fence post project, you can post the species and treatment on InstaBids for written bids.
Questions
How do I make a wood fence last longer?
The USDA Forest Service’s yard-and-garden fence guidance says: “Keep boards off the ground.” For fence posts, it specifies an in-depth preservative treatment, preferably pressure treatment for below-ground use.
Source: USDA Forest Service, Protecting wood fences for yard and garden, read 3 November 2026.
Do wood fence rails need more protection than boards?
The USDA Forest Service states: “Horizontal rails require more protection from decay than do vertical boards.” In regions of high and moderate decay hazard, it specifies naturally decay-resistant wood or pressure-treated wood for rails.
Source: USDA Forest Service, Protecting wood fences for yard and garden, read 3 November 2026.
Does heartwood matter for wood fence posts?
For wood fence posts made from naturally decay-resistant woods, the USDA Forest Service says to “choose posts with mostly heartwood.”
Source: USDA Forest Service, Protecting wood fences for yard and garden, read 3 November 2026.
Which nails does the source specify for a stained wood fence?
The USDA Forest Service specifies “aluminum or stainless steel nails” for wood fences when a water-repellent or stain finish will be used.
Source: USDA Forest Service, Protecting wood fences for yard and garden, read 3 November 2026.
What finish does the source describe for a wood fence?
For a wood fence finish, the USDA Forest Service specifies both a water repellent and a wood preservative. It also states: “Penetrating, pigmented stains are preferred over paints.”
Source: USDA Forest Service, Protecting wood fences for yard and garden, read 3 November 2026.
Do wood fence pickets need decay-resistant wood?
For wood fences in areas where high decay is likely, the USDA Forest Service specifies “Boards, pickets and other face parts” of naturally decay-resistant or treated wood. Elsewhere, its guidance discusses treating joints with a water-repellent preservative where permissible.
Source: USDA Forest Service, Protecting wood fences for yard and garden, read 3 November 2026.
Did treated wood fence posts survive a long field test?
A 1999 USDA Forest Service report recorded 30 years of field exposure with no failures for double-diffusion-treated Engelmann spruce, lodgepole pine and Rocky Mountain Douglas-fir fence posts. The test site was the semiarid Central Plains near Nunn, Colorado.
Source: USDA Forest Service, Service life of fence posts treated by double-diffusion methods (1999), read 3 November 2026.
You can include wood fence rail, board, fastener and finish details in your InstaBids job description for written bids.
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Sources for the figures on this page
- University of Georgia Cooperative Extension, Garden Fencing (2022), read 3 November 2026. Attributed extension excerpt.
- USDA Forest Service, Protecting wood fences for yard and garden, read 3 November 2026. US government work, public domain.
- USDA Forest Service, Service life of fence posts treated by double-diffusion methods (1999), read 3 November 2026. US government work, public domain.
Method: extension ranges describe posts by species and treatment; the Forest Service field result describes double-diffusion treatment at its Colorado test site. Neither supplies a whole-fence panel lifespan. The yard-and-garden guidance provides care actions without a maintenance interval.