We are a trusted deck builder in Toronto, Richmond Hill, Markham, and other nearby areas.
Cedar decks are popular for their natural beauty and pleasant scent. A lot of people wonder if leaving cedar untreated is actually a good move for the environment. Untreated cedar decks are generally more eco-friendly than most decking materials, but there are still trade-offs.
It’s easy to think raw wood is always the greenest choice, but even untreated cedar has an impact. It needs to be cut down and, eventually, it’ll rot away—but at least it avoids chemical coatings and plastics that can linger in the environment. If you’re thinking about building a cedar deck, it’s worth weighing the upsides and the drawbacks.
Key Takeaways
- Untreated cedar is less harmful than chemically treated options
- Natural wood breaks down easier at the end of its life
- Harvesting and longevity still matter
Understanding Cedar As a Decking Material
Cedar is a favorite for decks because of its natural strengths, the way it’s harvested, and how well it stands up outdoors. Let’s dig into what makes cedar both practical and good-looking for backyard projects.
Natural Characteristics of Cedar
Cedar stands out for its natural resistance to insects, rot, and decay. The wood’s own oils do most of the heavy lifting, so it doesn’t need much treatment compared to other woods.
The color of cedar ranges from light honey to deep red-brown. If left untreated, it fades into a silvery-grey that some people love. Others want to keep the original color and use oil, but that’s a personal call.
Cedar is also lighter in weight than most hardwoods, so it’s easier to haul around and install. It’s a softwood, but it’s surprisingly tough. Cutting and shaping cedar boards is less of a pain, which means less waste and a faster build.
Sourcing Cedar Sustainably
How cedar is harvested makes a big difference for the environment. Western Red Cedar is the main species for decks in Canada, and most reputable suppliers get it from forests certified by the Forest Stewardship Council (FSC) or similar organizations.
When sourcing cedar, here’s what matters:
- Certification marks (like FSC)
- Suppliers using responsible logging
- Clear info about where the wood comes from
Choosing sustainable cedar helps protect forests and supports companies that care about long-term forest health. It’s a good sign that trees are replanted and wildlife is considered.
Cedar’s Lifespan and Durability
Untreated cedar will last about 15-20 years above ground, give or take, depending on climate. Decks in damp or shady spots break down faster than those in dry, sunny places.
For durability:
- Sweep leaves and debris off the deck
- Make sure there’s airflow under the boards
- Try to keep cedar off the ground
Leaving cedar untreated still gives you a decent lifespan, but some maintenance—cleaning, the odd repair—helps. If you want a deck that’s low-fuss but still looks great, cedar’s a solid bet.
Environmental Impact of Untreated Cedar Decks
Untreated cedar is a go-to for folks who want a natural look and fewer chemicals. To really understand its environmental footprint, we’ve got to look at how it breaks down, how cedar forests are managed, and the energy it takes to get cedar to your backyard.
Biodegradability and Decomposition
One of cedar’s big wins is that it breaks down naturally. Without stains, paints, or sealants, there’s less risk to soil and groundwater as the deck ages and decomposes.
Cedar eventually rots and returns to the earth. That’s a big difference from pressure-treated or composite decks, which can leave behind plastics or chemicals for decades. If you ever rip up a cedar deck, those boards won’t hang around in a landfill forever.
Quick hits:
- Untreated cedar is non-toxic as it decomposes.
- Breaks down faster than synthetic or treated woods.
- Minimal soil and water impact compared to chemical-coated decks.
Forest Stewardship and Certification
How cedar is harvested is a big deal for eco-friendliness. We always recommend cedar with certifications from groups like the FSC.
Why care about certification?
- Certified cedar comes from forests that are responsibly managed—replanted and protected for the future.
- Certification helps curb over-logging and supports wildlife.
- Buying certified often means better worker treatment too.
If you want FSC-certified cedar, just ask. We can help you pick decking that’s both attractive and responsibly sourced.
Carbon Footprint and Transportation
Cedar mostly grows in British Columbia and the Pacific Northwest, so it has to travel to reach many homes.
For the carbon footprint:
- Local cedar means lower transportation emissions.
- Cedar is lighter than a lot of other deck materials, so it’s easier and cheaper to ship.
- If you get cedar from far away, the environmental cost goes up. We try to use local suppliers when we can.
Here’s a quick comparison:
| Material | Typical Source Region | Weight (kg per m³) | Transport Emissions |
|---|---|---|---|
| Cedar (local) | BC, Pacific Northwest | 380 | Low |
| Cedar (imported) | Eastern Canada/US | 380 | Higher |
| Composite | Global | 750 | Higher |
Comparing Cedar Decks To Other Materials
When you’re picking decking, it’s worth taking a real look at how each option stacks up for sustainability, chemicals, and maintenance. Cedar, pressure-treated wood, and composite all have their own quirks.
Cedar vs. Pressure-Treated Wood
Pressure-treated wood usually comes from pine or similar softwoods and is soaked in chemicals to fight rot and bugs. Cedar naturally handles insects and decay without any added chemicals, so it’s a better pick if you’re worried about toxins or what leaches into your soil.
Cedar is lighter and easier to work with, so you can often get the job done faster and with less gear. Pressure-treated wood is cheaper up front, but it may release chemicals over time, especially if you cut or burn it—not ideal for gardens or pets.
Here’s a quick rundown:
| Feature | Cedar | Pressure-Treated Wood |
|---|---|---|
| Chemical Additives | None | Yes |
| Maintenance | Moderate | Moderate-High |
| Lifespan | 15–20 yrs | 10–15 yrs |
| Environmental Risk | Low | Moderate-High |
Pressure-treated wood is still common for budget builds, but cedar is easier on the environment and can last longer if you take care of it.
Cedar vs. Composite Decking
Composite decking is made from recycled plastics and wood fibers. It’s famous for low upkeep—no painting or staining, just an occasional wash. But it’s not biodegradable, so it’ll end up in a landfill someday.
Cedar is fully biodegradable. Untreated cedar, especially, returns to nature safely. Composite boards do resist rot better, but they can get hot in the sun and just don’t feel like real wood.
Comparison:
| Feature | Cedar | Composite Decking |
|---|---|---|
| Biodegradable | Yes | No |
| Maintenance | Moderate | Low |
| Look & Feel | Natural wood | Plastic/wood blend |
| Initial Cost | Moderate | High |
Composite is great for “install and forget” types, but if you care about where your deck ends up and want that classic wood vibe, cedar is hard to beat.
Health and Safety Considerations
Building with untreated cedar brings some clear health and safety perks compared to pressure-treated wood. People often ask about chemical exposure and whether cedar is a good choice for sensitive folks.
Chemical-Free Benefits
One of the best things about untreated cedar? No extra chemicals. Pressure-treated wood uses pesticides or preservatives that can sometimes leach out, especially when wet.
With untreated cedar, you skip those risks. Kids and pets can play on the deck without you worrying about chemical residue. Cutting or sanding it won’t send any nasty dust into the air, either.
If you’re growing food nearby or like to go barefoot, untreated cedar means less to worry about touching your skin or getting into the soil. Plus, you don’t have to treat leftover scraps as hazardous waste. It just feels simpler and less stressful for families who spend a lot of time outside.
Allergies and Sensitive Users
Untreated cedar can still bother a few people with wood allergies or sensitivities. The natural oils and smell that keep bugs away can cause mild skin irritation—mostly for those who handle the wood a lot or already have sensitive skin.
Possible symptoms:
- Mild rash or itch
- Sneezing from the cedar scent
- Rarely, eye or throat irritation
Just sitting or walking on cedar isn’t an issue for most. But if someone in your family is sensitive, test a small piece first. Most people are fine, but it’s always smart to check. If allergies are a real concern, we can talk about other options.
And hey, washing hands after handling deck wood is never a bad idea—especially before you eat. Better safe than sorry.
Longevity and Maintenance of Untreated Cedar
Cedar decks without chemicals have a natural look and their own set of care needs. The lifespan and upkeep of untreated cedar might surprise you, especially compared to other woods.
Weather Resistance Without Chemicals
Cedar naturally resists moisture, rot, and bugs thanks to its oils. Even without chemicals, it handles rain and snow better than most softwoods. We still suggest building decks where water drains easily so moisture doesn’t get trapped and speed up decay.
In most climates, untreated cedar will turn grey over time. Some folks love the silver look, but heads up—the surface may roughen and develop small cracks after several years out in the elements. UV rays and temperature swings wear the wood down gradually.
Lifespan Table:
| Deck Type | Average Lifespan (Years) |
|---|---|
| Untreated Cedar | 10–15 |
| Treated Cedar | 15–20 |
| Pressure-Treated Pine | 15–20 |
If you want your cedar deck to stay looking fresh for years, a little regular care goes a long way.
Natural Maintenance Requirements
Cedar doesn’t need chemical sealants, but it does need some basic TLC. Sweep off leaves and debris every week or so to keep moisture and mold at bay.
Once a year, give the boards a good scrub with water and a soft brush. If mildew pops up, a little vinegar mixed with water works better than harsh cleaners. Avoid blasting it with a power washer—those can shred the wood fibers.
Splinters and small cracks will show up over time. A light sanding every few years keeps things smooth. No need for stains or varnish unless you want to change the color. If you’re happy with the natural look, some cleaning and minor fixes are usually enough to keep your deck in good shape.
End-of-Life Disposal Options
Untreated cedar decking can be disposed of in ways that cut down on waste and environmental impact. The choices you make here decide how much ends up in the landfill and how much you can reuse or return to nature.
Composting Untreated Cedar
You can usually compost untreated cedar boards when a deck reaches the end of its life. Cedar’s a natural wood, and if you haven’t added synthetic preservatives, paints, or stains, it’s pretty straightforward. Over time, it’ll break down in large compost piles or municipal compost programs, though not as quickly as some other woods.
Benefits of composting untreated cedar:
- Returns organic matter to the soil
- Reduces landfill waste
- Keeps harmful chemicals out of the environment
Cutting the boards into smaller pieces helps them break down faster. Cedar naturally resists rot, so it’ll take longer to compost, but it won’t mess up the process. Don’t try to compost cedar that’s been treated or finished—stick to 100% untreated wood.
Safe Burning and Energy Recovery
Burning untreated cedar in approved facilities is another option. This can recover some energy and keep wood waste out of the landfill. Untreated cedar burns cleaner than treated wood since it doesn’t release a bunch of extra chemicals.
Before you start burning cedar, check your local rules. Most places let you burn untreated wood in fire pits or wood stoves, but there might be restrictions during dry or windy weather. If you’ve got a lot to get rid of, municipal waste-to-energy plants can use the heat to generate electricity or warm up buildings.
Key Points:
- Only burn wood that hasn’t been painted or stained
- Check local rules to stay on the right side of the law
- Small amounts of untreated cedar work fine as firewood at home; bigger piles might need to go to an energy recovery facility
Potential Drawbacks For the Environment
Untreated cedar decks sound like a natural choice, but there are some environmental issues to weigh. You’ve got to consider how long the deck will last and where the cedar’s coming from.
Shorter Lifespan Compared to Treated Options
Untreated cedar looks beautiful, but it just doesn’t last as long as pressure-treated wood or composite decking. Even with its natural resistance, without sealants or preservatives, cedar breaks down faster in our wet Canadian climate.
Rot, mould, and bug damage show up more often with untreated wood. You might find yourself replacing boards or even rebuilding sections sooner than you’d like.
A shorter lifespan means:
- More frequent repairs and replacements
- Extra lumber use
- Higher costs for new boards and labour
- More waste heading to the landfill
All this can chip away at cedar’s environmental upsides, since you end up using more resources in the long run.
Risk of Overharvesting
Cedar’s popularity for its looks and weather resistance can lead to overharvesting. When forests get logged too quickly, it puts pressure on wild cedar stands, especially old-growth forests in B.C. and elsewhere in Canada.
Overharvesting can mean:
- Loss of wildlife habitat
- Damaged watersheds
- Less forest biodiversity
If you go with untreated cedar, ask your supplier about where it comes from. Look for certifications like FSC (Forest Stewardship Council) to make sure the decking material is from responsibly managed forests. Responsible sourcing matters—for the forests and for future deck projects.
Frequently Asked Questions
We hear a lot of questions about using untreated cedar for decks. Here are some honest answers from years of working with this wood.
What are the ecological impacts of using untreated cedar for deck building?
Using untreated cedar makes sense if you care about the environment. Cedar naturally resists rot, so you don’t need harsh chemical treatments.
It’s a renewable resource when it comes from managed Canadian forests. At the end of its life, cedar biodegrades, keeping old decks out of landfills.
What should homeowners consider when weighing cedar against composite decking materials?
Cedar’s natural, while composites are a mix of plastics and wood fibres. Composites use recycled content, but they won’t break down in the environment.
Cedar feels cooler underfoot on hot days and has a look that’s tough to imitate with plastic. Composites usually need less yearly maintenance, though.
How does untreated cedar perform in outdoor conditions over time?
Untreated cedar holds up pretty well outdoors, especially if there’s good airflow and a solid foundation. Its natural resistance to insects and rot helps it last in Canada’s climate.
Over time, cedar weathers to a silver-grey. Some people love that look; if you don’t, be ready for a bit of upkeep.
Can you compare the long-term costs of a cedar deck versus pressure-treated options?
Cedar usually costs more per board upfront than pressure-treated wood. Over time, though, cedar is less likely to twist or warp, so you might need fewer repairs.
Pressure-treated decks often need more attention and replacement boards. Cedar’s longer life can balance out the higher initial price, but you’ll want to budget for both short- and long-term maintenance.
In terms of environmental sustainability, how does cedar decking stack up against other wood choices?
Cedar comes from slower-growing trees, mostly harvested in Canada. When forests are managed well, cedar’s a solid eco-friendly choice.
Some imported hardwoods are durable but bring up concerns about deforestation. Pressure-treated lumber uses chemicals that some folks prefer to avoid in the backyard.
What maintenance considerations are there for cedar decks to ensure longevity and eco-friendliness?
Cedar decks hold up well with a bit of regular care. Just give your deck a good cleaning once a year, and sweep off leaves or dirt so moisture doesn’t linger.
Try skipping the harsh stuff—eco-friendly cleaners work just fine and they’re safer for kids, pets, and the planet. If you’re hoping to keep that fresh wood look, brushing on a clear sealant every few years goes a long way against weather and wear.