Repair or Replace Your Fence? Start With Where the Damage Is
A loose picket and a rotten post aren’t the same problem. The U.S. Forest Products Laboratory’s own wood-protection standard splits a fence into two different decay-hazard zones — and which zone is damaged is most of the answer.
Where the damage is tells you more than how bad it looks. The AWPA Use Category System (published in the USDA Wood Handbook) puts fence pickets and rails in a lower decay-hazard category than fence posts — so a damaged picket and a damaged post are genuinely different repair decisions, not just different amounts of the same problem.
Source: USDA Forest Products Laboratory, Wood Handbook FPL-GTR-282 (2021), Chapters 8, 14, 15 & 16; Texas Department of Insurance, “What you need to know about windstorm inspections.”
A fence has two different decay-hazard zones
It’s tempting to judge a fence by how rough it looks from the street. The Wood Handbook’s own classification system judges it by where the wood sits instead: pickets and rails are “general above-ground use, fully exposed to weather” (UC3B); posts are “ground contact … structurally critical or have high decay hazard” (UC4A). Ground-contact wood simply fails faster and more seriously than wood that only gets rained on — which is the whole reason a damaged picket and a damaged post deserve different decisions.
Repair-or-replace triage
Pick what’s actually damaged. This points to which AWPA use-category zone is affected — it isn’t a diagnosis of your specific fence, and some calls (how far decay has spread, whether a footing is still sound) need a look in person.
Based on AWPA’s Use Category System (USDA Wood Handbook FPL-GTR-282, Table 15-6) and the Wood Handbook’s fastener-corrosion chapters.
Rust streaks can be a hardware problem, not a wood problem
A dark streak bleeding down from a nail or screw head looks alarming, but it’s often the fastener talking, not the fence. Plain steel fasteners react with tannins in high-tannin woods — cedar, redwood, oak — producing an iron-stain streak; in low-tannin woods like pine, the same plain steel just rusts without the streak. Either way, it’s a sign to look at the hardware before assuming the board itself is failing.
The wood itself matters too
Species affects how fast any of this shows up. Cedar and redwood heartwood are naturally more decay-resistant than pine, spruce, or fir, per the Wood Handbook’s own species groupings. That doesn’t make a cedar post immune to ground-contact decay — it just tends to buy more time before the UC4A zone catches up with it.
Heartwood decay resistance, common fence woods
| Group | Examples |
|---|---|
| Resistant / very resistant | Cedar, redwood (old growth), black locust |
| Moderately resistant | Douglas-fir, cypress (young growth) |
| Slightly or nonresistant | Pine, spruce, true firs (without preservative treatment) |
USDA Wood Handbook FPL-GTR-282, Table 14-1 (grouping by average heartwood decay resistance).
Not sure which side of the line your fence is on?
We’ll look at where the damage actually is — pickets and rails, or the posts — and give you a straight answer on repair vs. replace before any work starts.
What customers say on Google
5.091 Google reviews · read them all on Google
I have hired Mustang fencing services to fix my backyard fencing. Good wood to used. I really like theirs work. Best of luck
Fenomenal job, really nice guy. Contacted them after hurricane knocked down my fence facing the street and got it done really quickly.
Excellent work. They came in handy after the hurricane hit our backyard. Friendly people too.
Reviews shown word for word from the Mustang Fencing Services Google Business Profile (Galveston), captured 2026-11-07.
Questions we get about this
How do I know if my wood fence needs repair or full replacement?
Does one damaged fence post always mean I need a whole new fence?
What do rust-colored streaks on my fence boards mean?
Do I need a permit or inspection to repair or replace a fence in Galveston?
Does the type of wood affect whether repair makes sense?
Sources
Checked November 7, 2026. Rules change, so confirm with the City before you build.
- USDA Forest Products Laboratory, Wood Handbook: Wood as an Engineering Material, FPL-GTR-282 (2021) — Chapter 15 Table 15-6 (AWPA Use Category System, UC3B/UC4A); Chapter 14 Table 14-1 (decay resistance groupings); Chapters 8 & 16 (fastener withdrawal resistance and iron staining).
- Texas Department of Insurance, “What you need to know about windstorm inspections” — Lists “repairs or replacement of fences” among items that do not require a WPI-8/WPI-8-E windstorm certificate of compliance inspection.