Most wood-or-vinyl advice treats Texas as one climate. A fence line in Kingwood spends its life fighting wet air and rot. The same fence in Plano fights wind, hard sun, and clay that shifts under the posts.
Wood and vinyl fail under opposite conditions, so the honest answer changes with your metro. Pick by the force your yard actually applies and you buy years; pick by the picture in the brochure and you buy a rebuild.
Houston’s Wood Decay Hazard Runs Nearly Double Dallas’s
That gap is why this is a local question and never a Texas-wide one. The Scheffer Decay Hazard Index, recalculated on 1971 to 2000 climate normals, puts Houston at 77.2 and Dallas at 44.3, with Austin at 55.2 and San Antonio at 52.2 (USDA Forest Products Laboratory, 2009). Anything above 65 is the high band. Houston and the coast sit inside it. Dallas, Austin, and San Antonio do not.
| Texas location | Scheffer index | Decay band | What it means for wood |
|---|---|---|---|
| Port Arthur | 80.7 | High (above 65) | Hardest rot climate on the Texas coast |
| Houston | 77.2 | High (above 65) | Wood works against the climate every day |
| Austin | 55.2 | Moderate (35 to 65) | Wood is a fair bet with the right posts |
| San Antonio | 52.2 | Moderate (35 to 65) | Wood is a fair bet with the right posts |
| Dallas | 44.3 | Moderate (35 to 65) | Lowest rot pressure of the four big metros |
| El Paso | 25.8 | Low (below 35) | Rot is close to a non-issue |
Vinyl has no place on that chart, and that is the point. A PVC panel does not feed a decay fungus, so the index that governs a wood fence’s life in Houston does not touch it. The index also runs a little higher now than the original 1971 map showed, so a Gulf Corridor number is a floor rather than a ceiling.
Wood Fails at the Ground Line, Where It Stays Wet
Rot needs water inside the wood, not weather on the outside of it. Serious decay only starts once wood moisture passes the fiber saturation point, an average of 30%, while air-dried wood holding at or under 20% carries what the Wood Handbook calls a reasonable margin of safety against fungal damage (USDA Forest Products Laboratory, 2021). The last 6 inches above grade almost never get there.
Three places on a wood fence stay wet long enough to matter:
- The post base. Soil holds water against the post, and the post cannot dry from the buried side. This is where nearly every Texas wood fence ends.
- The bottom rail and the kickboard. Splash-back off the dirt keeps the lowest board damp for days after a rain.
- Shaded runs. A fence line under live oaks in Kingwood or Memorial dries slowly, so the same board there works harder than a board in full sun 40 feet away.
Cedar’s rot resistance sits in the heartwood, the dark inner wood. The pale sapwood along the edge of a cedar picket has very little of it, so a bundle heavy with sapwood ages like ordinary lumber. Below the ground, cedar is the wrong answer entirely: buried posts should be pressure-treated pine rated for ground contact, because the treatment is engineered for the exposure the wood is going into.
Does a Vinyl Fence Warp in Texas Heat?
Not in the way people picture, and the standard behind the panel is the reason. ASTM F964 requires the rigid PVC used in fence profiles to hold at least 0.6 in.-lb/mil of impact resistance after weathering exposure at hot-dry, hot-humid, and temperate test sites (ASTM International, 2019). The material is qualified against the exact two climates Texas hands it.
What vinyl does do is expand and contract with temperature, every day, for as long as it stands. The Office of the Texas State Climatologist projects that 100-degree days are on track to be roughly four times as common by 2036 as in the 1970s and 1980s (Office of the Texas State Climatologist, 2024). A panel that was pinned tight at install has nowhere to go on the 20th day above 100, and that is when a run buckles or a rail pops.
So a vinyl fence is won or lost on install day, on three things:
- Rails set into routed posts with the maker’s expansion allowance, so the panel can grow and shrink without pushing on anything.
- Post spacing at the manufacturer’s spec, because a stretched bay carries more panel weight and more movement than the profile was rated for.
- Full-depth concrete footings, since the panel is only as straight as the posts holding it.
What Do Ground Contact and Heartwood Mean on a Fence Quote?
They are the words that separate two bids with the same number at the bottom. A quote that names all five below is a spec sheet; a quote that names none is a guess.
| Term | What it means | Why it changes your bid |
|---|---|---|
| Ground contact | A treatment rating for wood buried in soil | A post without it is the first part of the fence to fail |
| Heartwood | The dark inner wood of a cedar board | Only the heartwood carries cedar’s rot resistance |
| Picket grade | Wood picket quality, graded #1 through #3 | A #3 picket has more knots and more sapwood than a #1 |
| Routed post | A vinyl post slotted to hold the rail | Lets the panel expand in Texas heat without binding |
| Linear foot | One running foot of finished fence line | The unit both materials get priced in, so compare it directly |
Check the Soil Under Both Materials Before You Choose
Neither material solves the ground it stands in, and Texas ground moves. The NRCS classifies Houston Black, the official Texas state soil covering about 1.5 million acres of Blackland Prairie from Dallas south to San Antonio, as a smectite-clay Vertisol running roughly 60% to 80% clay, with very high shrink-swell listed as a recognized limitation for building sites (USDA Natural Resources Conservation Service, 2023). Coastal Houston clay behaves the same way for the same reason.
Clay swells when it is wet and pulls away when it is dry. A post set shallow rides that cycle twice a year until the line goes crooked. Wood shows it as a lean; vinyl shows it as a gap where two panels no longer meet. Post depth, hole diameter, and concrete are what hold either fence straight, and they cost the same whichever material sits on top. Ask any bidder how deep the posts go before you ask them what the panels cost.
A Fence Priced per Foot Hides the Cost per Year
Service life is the number that decides this, and the two materials are not close on paper. InterNACHI’s life-expectancy chart for homes rates a wood fence at about 20 years and a polyvinyl fence at 100-plus, the widest gap between the two most common Texas fence materials in any single comparable reference.
| Material (6 ft residential) | Texas installed cost per foot | Rated service life | Cost per foot per year of rated life |
|---|---|---|---|
| Pressure-treated pine | $18 to $30 | About 20 years | $0.90 to $1.50 |
| Cedar | $25 to $45 | About 20 years | $1.25 to $2.25 |
| Vinyl (PVC) | $30 to $60 | 100-plus years | $0.30 to $0.60 |
Read those wood lives as national averages, because that is what they are. National wood-fence installs run $20 to $50 per linear foot (HomeGuide, 2026), and Texas sits at or below that thanks to nearby pine and cedar supply. In Houston’s high decay band the 20-year figure is optimistic for anything but heartwood pickets over ground-contact posts. In Dallas at 44.3, the same board has an easier job and gets closer to the number.
Wood also stays in the running on price for a reason we can put a name to. We are Master Halco’s largest-volume customer, holding their 2026 Largest Volume Customer awards for the Southwest Region and the World, and a top customer of Solid Wood. That picket cost gets passed through, so the wood option in front of you is the same spec for less money rather than a thinner spec for the same money. It is also why we name the picket grade in writing. A bid that says “cedar” and nothing else can be built out of #3 pickets and still be honest.
