3 Deck Mistakes That Will Make You Rip It Out

How I Watched a Deck Get Torn Apart

A homeowner I know built his own deck. It looked fine at first, but just two years in, boards warped, the railing wobbled, and it started to lean. The whole thing had to come down and get rebuilt by pros. What went wrong? Three big mistakes that could happen to anyone trying to do it themselves.

Mistake 1: Skipping Utility Locates and Permits

Before a shovel hits the dirt, there’s a boring but crucial step: call your local utility locate service (Call Before You Dig). You don’t want to hit gas lines, water pipes, or electrical lines under your yard. Doing this saves lives and money.

A lot of homeowners skip this step thinking it’s unnecessary or a hassle. Plus, municipal permits are a must. If you build without one, any inspection failure could mean a forced teardown.

Mistake 2: Poor Foundation Choices

Your deck needs a solid, level support system. Many try to get away with just dumping concrete footings in the ground without measuring frost lines or soil conditions.

In Canada’s freeze-thaw cycle, footings not deep enough will shift and cause the deck to lean or crack over time. The rule of thumb is roughly 3 to 4 feet deep to get below frost penetration.

Measure twice, dig once. Investing in proper footings upfront avoids headaches later.

Mistake 3: Using Wrong or Poor-Quality Materials

Some DIYers try to cut corners using untreated wood or lower-grade fasteners. Deck boards need to resist rot and moisture. Treated lumber or composite decking with proper corrosion-resistant screws will last longer.

Remember, the short building season means moisture can get trapped under your deck one year and freeze the next. That’s tough on the structure if materials aren’t up to snuff.

The Don't Do This List

• Don’t skip utility locates.
• Don’t go without permits.
• Don’t ignore frost line depth.
• Don’t use untreated or low-quality wood.
• Don’t guess measurements.

3 Quick Tips to Avoid These Mistakes

1. Contact your local utilities and get your permits before starting.
2. Plan and dig your footings at least 3 feet deep, depending on local frost line data.
3. Use treated lumber or composite materials and corrosion-resistant fasteners.

Getting these basics right means your deck won’t be that teardown story. It’ll be the place you actually want to spend time, year after year.

Keep it simple, follow the local rules, and don’t cut corners on the foundation. A deck is a long-term investment in your home and lifestyle — do it right the first time.

What Happens By Year 5?

If your deck survived the first winter without moving or splitting, you’re ahead of most DIY projects. The first thing to check after a few years is the integrity of posts and fasteners, especially where wood meets concrete.

Rot tends to show up where water pools or where untreated lumber touches the ground. Keep an eye on railings and stairs for any looseness.

Routine maintenance—power washing and sealing treated wood—helps extend life, especially with our short Canadian outdoor seasons. Generally, decks built with good material and proper footings last well beyond 10 years.

Bottom Line

A well-built deck serves you for years. When doing it yourself, don’t rush or overlook the small but vital steps like permits, utility locates, and footing depth. Use quality materials suited for the freeze-thaw stresses. Avoid these three mistakes, and you’ll have a deck that stands strong rather than one that comes down too soon.