Horizontal privacy fences are everywhere right now. Walk through any block where somebody pulled a permit in the last three years and you’ll see them — clean lines, no dog-eared pickets, just flat horizontal slats stacked up tight. They look sharp. They also cost more than people think, and homeowners keep using the wrong material because YouTube makes it look easy.

So let’s settle it. Deck boards or fence pickets?

The short answer

If you want the fence to actually look like the Pinterest photo five years from now, use deck boards — probably composite or cedar 5/4x6.

If you’re on a real budget and you don’t mind it looking a little more rustic, fence pickets work. But only if you space your posts right, and only if you accept it’s going to need attention sooner.

That’s the whole answer. Everything below is why.

Cost is not even close

A pressure-treated dog-ear picket runs you maybe $3 at the box store. A 6-foot square-top is a buck or two more. Cedar pickets, say $5 to $8 depending on grade and what part of the country you’re in.

A 5/4x6 cedar deck board, 8 feet long? You’re looking at $15 to $25 each. Composite like Trex or TimberTech? $35 to $60. PVC like Azek? Even more than that.

For an average backyard fence of 100 linear feet at 6 feet tall, that material gap can be $1,500 to $5,000 just on the slats. That’s before posts, concrete, fasteners, hardware, framing lumber, and your time or a contractor’s labor.

If you’re already pinching pennies on this project, deck boards aren’t going to fix that. They’re going to make it worse.

What they actually look like

Fence pickets are thin — usually 5/8“ thick. Stacked horizontally, they look like fence pickets stacked horizontally. Which is fine. They do the job. But you can see they were designed to be skinny pieces of wood spanning between two rails on a regular vertical fence.

Deck boards are thick — 1“ or more — and that thickness gives the fence a chunkier, more architectural look. The shadow lines are deeper. The board edges read crisper. When magazines shoot these fences, they’re shooting deck boards.

If you don’t care about that and you just want privacy, fence pickets do exactly the same job from a “can the neighbor see in” standpoint. The look is the only reason to spend the extra money. Be honest with yourself about whether you actually care.

Here’s where people screw it up: post spacing

This is the one I see go wrong constantly. Homeowner watches a video, builds a horizontal fence with regular pickets, sets the posts at 8 feet on center because that’s what the fence calculator said. Two summers later, every picket is bowed in the middle like a hammock.

Horizontal pickets sag. They’re thin. They span the wrong way. They are not engineered for an 8-foot horizontal run.

I had a customer up in Roxborough call me last spring. They’d built one themselves the year before — 80 feet of it, looked great on day one. Every single picket had dipped three-quarters of an inch in the middle. We ended up tearing the whole thing down and rebuilding with posts at 4-foot centers using actual deck boards. The “savings” from doing it the cheap way cost them double.

If you’re using fence pickets horizontally, your posts need to be no more than 6 feet apart. 4 feet is better. Yes, you’re buying more posts and more concrete. That’s the trade.

Deck boards at 1“ thick can span 8 feet without much drama, especially good composite or quality cedar. That’s part of what you’re paying for.

Maintenance and longevity

Pressure-treated pine pickets, even installed perfectly, are going to twist, cup, and crack. That’s just what PT pine does. You can stain them and slow it down, but by year 5 to 7 they start looking tired, and by year 10 you’re replacing boards.

Cedar pickets last longer — 15 years is realistic — but they go silver if you don’t stain them, and you have to actually stain them every couple of years for them to hold color. Most people don’t. Most people swear they will, and then they don’t.

Cedar deck boards are the same wood in thicker stock, so they hold up better against the warp-and-twist game. Maybe 20 years if you stay on top of the finish.

Composite and PVC deck boards? You install them and you forget about them. Hose them off when they get dusty. No staining, no sealing, no replacing warped boards. 25+ years, easy. That’s what you’re really buying when you go composite — your weekends back.

So which one should you buy?

Comes down to your budget and how long you’re staying in the house.

If you’re going to live there 20+ years and you want the fence to look right the whole time, spend the money on composite deck boards. You’ll never touch them again.

If you’re staying 5 to 10 years and the look matters to you, cedar deck boards are the sweet spot. Real wood, real warmth, holds up through your time in the house.

If you’re on a tight budget and you need a privacy fence now, use cedar fence pickets, set your posts at 4 to 6 feet on center, and stain them right away — not next spring, right away. It’ll look good. It just won’t look like the magazine shots.

One last thing: do not use pressure-treated pine pickets horizontally. They’ll twist on you by next summer and you’ll hate looking at it. If your budget only stretches to PT pine, build a normal vertical fence and call it a day. There’s no shame in that.

Pick your budget, pick your timeline, build it right.