How long does a deck last in Colorado?

Short answer: it depends on the material. With normal care on the Front Range, a wood deck lasts about 10 to 20 years and a good composite deck lasts about 25 to 50 years. But Colorado is hard on decks. Our strong sun, hail, and clay soil can cut those years way down if a deck is built cheap or never cared for. Here is how long each type really lasts, what makes them fail early up here, and how to get the most years out of yours.

How long each deck lasts with normal care

These are the ranges we see on the Front Range when a deck is built right and gets basic care:

• Pressure-treated wood: about 10 to 15 years. The cheapest deck to build. It needs the most care, and out here in the sun it wears out first.
• Cedar: about 15 to 20 years. A nicer, natural wood. It still needs re-sealing, but it holds up a bit longer than pressure-treated.
• Capped composite (TimberTech, Trex, Deckorators): about 25 to 50 years. Costs more up front, needs almost no care, and many boards even carry a 25 to 50 year warranty. This is the longest-lasting deck for our weather.

So the same deck can last 12 years or 40 years. The material you pick, and how the deck is built, makes all the difference.

What makes decks fail early in Colorado

We get called out to look at worn-out decks all the time. Almost always, it comes down to a few things:

• Skipped sealing. Our high-altitude sun is strong. It dries wood out and turns it gray fast. If a wood deck does not get cleaned and re-sealed every year or two, it cracks and splinters years early.
• Shallow footings that heave. Front Range soil is expansive clay. It swells when wet and shrinks when dry. If the footings do not go deep into solid ground, the deck lifts and pulls away from the house. We have seen decks tilt in their first winter.
• Hail damage. We live in Hail Alley. Big hail dents and cracks wood boards and can chip a cheap composite. Good capped composite shrugs most of it off.
• Freeze and thaw. Water gets into a crack, freezes at night, and pushes the crack wider. Do that a few hundred times a winter and boards and fasteners give out.
• Cheap boards. A budget deck built with thin boards or no-name composite fades, chalks, and warps long before a quality one does.

How to get the most years out of your deck

A little care goes a long way up here. To get the full lifespan out of a deck:

• Seal or stain wood every 1 to 2 years. This is the single biggest thing you can do for a wood deck in Colorado. It keeps the sun and water out.
• Keep it clear. Sweep off leaves, dirt, and snow. Wet piles trapped on boards are where rot starts.
• Fix small things fast. Tighten loose boards, replace popped screws, and reseal any cracks before water gets in and freezes.
• Check the ledger once a year. That is the board where the deck attaches to your house. It is the most important spot on the whole deck. Make sure it is tight and dry.
• Want zero upkeep? Go composite. A capped composite deck just needs a rinse now and then. For most Front Range homeowners it is the longest-lasting, easiest choice.

Repair or replace: how to tell

An old deck does not always need to come down. Here is the simple rule we use:

• Repair when the frame and footings are solid and only the surface boards, railings, or stairs are worn. You can often re-board a good frame and get many more years for a lot less money.
• Replace when the posts wobble, the footings have heaved, the frame is soft or rotting, or the deck was never built to code. At that point a repair is just money on top of a problem, and a new deck is safer and often cheaper over time.

If you are not sure which one you need, that is exactly what a free walk-through is for. We will tell you straight. You can also read our guide on repairing vs replacing a Colorado deck for more.

Bottom line: a wood deck lasts about 10 to 20 years here and a composite deck lasts about 25 to 50 years, but only if it is built right for our clay, sun, and hail, and given basic care. Want to know how many years your deck has left, or price a new one that will outlast the last one? See our deck work or grab a free estimate below.