Pressure-Treated Pine Fences: The Workhorse Wood, and How It Compares With Cedar

Pressure-Treated Pine vs Cedar: Where Each One Wins

Both make a good fence. They are good at different things.

• Cost: pine is the less expensive of the two, often by a wide margin on a long fence.
• Stability: cedar wins. It is lighter, drier when installed, and shrinks, cups and twists less. Pine moves noticeably as it dries.
• Appearance: cedar has a warmer color and finer grain. New pine has a green or tan cast that fades. Left alone, both turn gray.
• Rot resistance: cedar heartwood resists decay naturally, while pine depends on its treatment. In the ground, properly rated treated pine is the more dependable post.
• Strength: pine is denser and harder, so it holds fasteners firmly and takes knocks better.
• A common build: cedar pickets on treated pine or steel posts, which puts each material where it does best.

How Treated Pine Behaves in Its First Year

Treated pine usually arrives wet from the treatment process. A fresh picket is heavy and swollen. Over the first months in the sun it dries, and as it does it shrinks across its width. Pickets that were installed touching will show small gaps. Some boards will cup or develop surface cracks called checks. A few may twist.

This is normal behavior for the material, not a defect in the fence. It can be managed. Pickets installed tight end up with narrow gaps instead of wide ones. Enough fasteners, placed correctly, hold boards flat while they dry. Overlapping styles like board on board hide the movement entirely. If you want a fence that looks the same in a year as it does on day one, cedar or a non-wood material will get you closer.

Pine Fence Installation Details That Matter

With treated pine, a handful of choices separate a fence that ages well from one that does not. Posts must be ground-contact rated and set in concrete. Fasteners need to be hot-dip galvanized or stainless, because the copper in modern preservatives corrodes plain steel, and a rusted nail leaves a black streak and then lets go.

We install pickets with the bottoms held just off the soil so they are not wicking water, and with rails sized for the height of the fence. Cut ends expose wood the preservative may not have reached fully, so cuts are kept out of the ground. After the utilities are marked, the order of work is posts, rails, pickets, then gates.

Knowing When a Pine Fence Needs Replacing

Gray color alone means nothing. Weathered pine can be structurally fine. Look at the posts instead. Push on the fence near each one. Movement at ground level, or a post you can sink a screwdriver into at the soil line, means the post is done. Other signs are rails split at the fasteners, pickets that crumble at the bottom, and sections held up mostly by the neighbors on either side.

A few bad pickets or a single post can be repaired. Widespread post failure calls for a new fence. Replacement covers tear-out, removal of the old concrete footings, disposal, and a rebuild on new holes. If post rot is what ended the old fence, ask us to price the new one on galvanized steel posts as well as on wood.

Treated Pine in Charlotte's Clay and Humidity

Our climate tests this material from both ends. Humid summers and frequent storms keep fences wet, and slow-draining red clay keeps the posts wet longest of all. Then a dry spell pulls the moisture out fast, which is when boards check and cup. Termites are active across the Carolinas too, which is one reason untreated wood is not an option for a fence here.

Treated pine handles all of that reasonably well for the money, which explains why you see it on most lots from Huntersville to Rock Hill. Keep sprinklers from soaking it daily, keep mulch and soil off the pickets, and trim back plants that hold moisture against it. QC Fence Contractors does not offer staining, but a sealer applied by you or a painter once the wood has dried will slow the weathering.