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There are many benefits to using pressure-treated wood in your deck, fence or patio. When exposed to the elements, especially over several years, wood can begin to rot or even be eaten by certain insects. The big question on many people’s minds before deciding on the wood for your exterior projects is how long does pressure-treated wood last? Also, a lot of people will wonder, does pressure-treated wood rot. These are big questions, especially if you want to put in a new deck or fence.

We have got you covered regarding your concerns around this type of lumber. Let’s dig into all of the details involved in answering this crucial question that’s on your mind!

How Long Does Pressure-Treated Wood Last?

What is Pressure-Treated Wood?

This type of lumber goes through a process that uses high pressure to impact a solution of usually water and preservative agents deep within the wood. This process is all about helping to extend the lumber’s lifespan. If your wood is pressure treated, it’s likely to hold up better against moisture and natural decay. It also helps to fight against termites and fungus as well.

The active ingredients you’re likely to find in this type of lumber are usually a combination of various alkaline coppers. You’ll find pressure-treated wood in decks, fences, pergolas and handrails. You’ll even find it used for docks, walkways, sheds, and wood furniture. Now, let’s think about how long does it last as well as does pressure treated wood rot.

Can You Paint or Stain It?

One might think that treated lumber might not withstand paint or stain. The thing is, though, you can paint or stain pressure-treated wood! It’s wholly encouraged. If you want your deck or fence to withstand the test of time, it will usually need to be maintained annually. And that includes staining it!

You’re going to want to maintain the sealant for moisture-repellent purposes. Giving your deck or fencing a good washing with a high-intensity washer is also a good idea. And if your deck needs re-staining or a new paint job, that’s also necessary.

Painter Staining Hardwood Floor

How Long Does Pressure-Treated Wood Last?

Wood is an excellent and beautiful renewable resource. However, there will be decay and deterioration once exposed to the elements. If you go with wood that is pressure treated, though, you are likely going to see an extended life for your lumber.

So, really — how long does treated lumber last? It depends on where you live, the climate, and the general upkeep. Most PT wood manufacturers guarantee anywhere from 25 – 40 years. So, if you’re thinking about pressure-treated wood rot, that’s a very long time and is worth the investment, especially if you plan on living in your home long term!

How to Extend the Life of Pressure-Treated Wood

Even though pressure-treated wood is already capitalized to resist damage, it’s beneficial – and in many cases necessary – to maintain it properly. Here are some practical tips to help you keep your pressure-treated wood projects looking great for years.

1. Allow the Wood to Dry Out

After purchasing the wood, give it time to dry out before applying any paint or stain. This allows the preservatives from the pressure-treatment process to settle in, making future applications more effective.

2. Use a Wood Preservative

Even though pressure-treated wood is highly resistant to rot and insect infestation, an extra layer of protection using a wood preservative won’t hurt. A wood preservative offers an additional barrier against fungi and insects, extending the life of your wood.

3. Seal or Stain the Wood

Staining or painting pressure-treated wood with a high-quality stain or sealant helps to repel water and prevent the wood from cracking or splitting. This not only contributes to prolonging the life of the wood but also enhances its appearance.

4. Regular Maintenance

Regular maintenance is arguably the most effective way to extend the lifespan of your pressure-treated wood. Check it periodically for signs of damage or rot and address any issues as soon as possible.

Exterior Downtown
Staining Deck Floor

5. Keep It Clean

Like any outdoor material, pressure-treated wood collects dirt, mildew, and algae over time. These contaminants can degrade the surface of the wood, shortening its lifespan. Regular cleaning with a specially formulated deck cleaner or a homemade mixture of water and mild detergent helps preserve its integrity.

Cleaning Deck With Pressure Washer

6. Limit Exposure to Water

Whilst pressure-treated wood is made to withstand weather elements, constant exposure to water can affect its durability. Ensure your structures have proper drainage or cover them during heavy rainfalls to limit water exposure.

Other things to consider…

One thing that you maybe didn’t know about pressure-treated wood is that it usually comes from the manufacturer damp. If you’re staining it for the first time, you’ll want to ensure it’s dry enough to accept the coating. A good tip is sprinkling a little water onto the lumber for your deck or fence. May the droplets absorb, and it is ready to be stained.

If you need to repair your lumber, there’s no harm in going that route as well. If it’s a fence, check out your posts first. For wobbly posts, be sure the concrete base is still in good shape. From there, be sure to get the wood measurements right. You can add new features anytime if you’re thinking about pressure-treating wood rot and replacing wood pieces. Once your rotted wood pieces are nailed down, paint or stain them in the same colour!

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Wood Deck Replacement and Repairs
Wood Deck Replacement and Repairs
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To sum up, pressure-treated wood is a robust and durable choice for outdoor projects. Its longevity is one of its most appealing attributes. However, how long does painted pressure-treated wood lasts depends greatly on how well you maintain and care for it. With appropriate care, such as regular inspections, sealing, and painting, your pressure-treated wood can stand the test of time and serve you for many happy, productive years.

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If you’re looking to get your deck stained or have some exterior painting done and it sounds like it involves too much time and energy to do yourself, call 416.494.9095 or email Brian@HomePaintersToronto.com for a FREE quote. Also, don’t forget to follow us on all our social channels below!