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Choosing between hollow and solid composite boards can feel a bit overwhelming, especially if you’re building your first deck. The main difference is that hollow boards are lighter and often more budget-friendly, while solid boards are heavier, sturdier, and built to last longer. Both options have their place, and picking one comes down to what works best for you, your space, and your budget.
Deck building is a big investment, so it’s important to get it right the first time. We’ll walk you through the pros and cons of each type of board, how they hold up in Canadian weather, and what maintenance looks like in the long run.
Key Takeaways
- Hollow boards are lighter and generally cost less, solid boards are sturdier and longer-lasting.
- Climate, usage, and installation needs matter when choosing board type.
- Consider long-term durability and maintenance needs before deciding.
Understanding Hollow and Solid Composite Boards
People often ask about the differences between hollow and solid composite boards. Each type brings its own structure, feel, and performance. Understanding their strengths makes it easier to choose what’s best for your deck.
What Are Hollow Composite Boards?
Hollow composite boards, as the name suggests, have empty spaces running through the centre. This design makes them lighter and easier to carry. The hollows use less material, so we usually save on costs.
The lighter weight makes these boards simple to transport and handle during installation—a real bonus on rooftop decks or spots where weight matters. But, hollow boards might sound a bit more hollow underfoot if you don’t support them well. They can also crack at the ends if you’re not careful with fasteners.
Hollow boards typically need end caps or fascia to finish the look; otherwise, dirt and water sneak inside. We like hollow boards for budget projects or places where thickness and weight could cause issues.
What Are Solid Composite Boards?
Solid composite boards are dense all the way through. They look and feel most like real wood. This makes them sturdy and solid underfoot, which customers often prefer for decks that see lots of traffic.
They’re heavier than hollow boards. That adds strength, but the extra weight means you need to plan ahead for moving and installing. Solid boards handle impact better and are less likely to crack, chip, or flex over time.
Edge finishing is easier since solid boards don’t have open spaces showing. They tend to cost a bit more but give a more premium, lasting deck. If looks, feel, and strength matter most, we usually recommend solid boards.
Materials and Composition
Both hollow and solid boards use a blend of wood fibres and recycled plastic, usually polyethylene. This combo makes composite decking resist rot, insects, and moisture—traditional lumber just can’t compete. The plastic helps shed water, and the wood fibres give a natural look.
Most boards have a protective cap—a thin outer layer that improves fade resistance, stops stains, and protects against scratches. The main difference isn’t the material itself, but whether it’s solid or formed with empty chambers.
Here’s a quick breakdown in table form:
| Type | Weight | Finish Options | Typical Cost | Strength |
|---|---|---|---|---|
| Hollow | Lighter | Needs end caps | Lower | Less sturdy |
| Solid | Heavier | No end caps | Higher | More sturdy |
We always check what’s most important—budget, weight, finish, and long-term strength—to help decide which composite works best for the project.
Key Differences Between Hollow and Solid Boards
When we’re picking between hollow and solid composite boards, it’s important to look at their structure, weight, and how they look once installed. Each type has its own strengths and weaknesses that can affect how your deck feels and performs over time.
Structural Strength
Solid boards are built as one piece all the way through, making them stronger and better at handling heavy loads. This type is sturdy underfoot and doesn’t bounce much, which is important if our deck will see lots of use or hold up furniture, barbecues, and crowds.
Hollow boards have air pockets inside, so they use less material. They’re not as strong as solid boards, especially when it comes to supporting weight between joists. Over time, heavy pressure can cause hollow boards to flex or crack.
If we’re building a deck in high-traffic areas or where there’s risk of dropping objects, solid boards usually provide better long-term durability. But if our deck is in a quieter spot and won’t see a lot of weight, hollow can still work well for light use.
Weight and Handling
Hollow boards are much lighter than solid boards, sometimes weighing up to a third less. This makes them easier to move, lift, and install. If we’re working on a rooftop, small balcony, or need to carry boards up stairs, hollow boards can save our backs and speed up our work.
Solid boards are heavier and a bit more challenging to handle, especially if we’ve got a large deck to build. This might mean we need more hands on deck (pun intended!) when carrying and positioning each board. Heavier boards also add more weight to the frame, so we need to be sure our deck structure is strong enough to hold them.
Here’s a quick comparison:
| Feature | Hollow | Solid |
|---|---|---|
| Weight | Light | Heavy |
| Ease of Handling | Easy to move/cut | Requires more effort |
Appearance and Aesthetics
Solid boards usually look more like real wood because they don’t have open ends. The grain runs all the way through and feels authentic, which is nice if we want a natural look. The ends also hide better, so there’s no need for special trim or caps.
Hollow boards often have visible holes or chambers at the ends. If we don’t cap these, the deck can look unfinished, and debris or bugs might collect inside. Manufacturers do offer trim pieces and caps to solve this, but it’s an extra step and sometimes an extra cost.
Both types come in a good range of colours and textures. However, if we’re picky about matching a certain style or want the deck to look as close to traditional timber as possible, solid boards usually win in the looks department.
Durability and Longevity
When we’re picking between hollow and solid composite boards, durability is one of the first things we look at. We want a deck that stands up to our Canadian weather—not just for a few years, but for a long time.
Solid composite boards are generally stronger. They can handle heavy foot traffic and are less likely to crack or break if something heavy drops on them. If we’re building a high-traffic deck or an area with lots of furniture, solid boards offer more peace of mind.
Hollow boards tend to be lighter. This makes them easier for us to handle and install, but they might not be as tough in the long run. They’re more likely to be damaged by impact or if something gets wedged into the open ends.
| Feature | Solid Composite | Hollow Composite |
|---|---|---|
| Resistance to impact | Higher | Lower |
| Lifespan | Often longer | Sometimes shorter |
| Weight | Heavier | Lighter |
Both solid and hollow boards resist rot, mould, and insects—something that traditional wood struggles with. However, when it comes to durability against hard use and heavy weather, solid boards usually have the edge.
If we’re working in a spot with lots of moisture or ice, solid composite holds up a bit better. It’s less likely to develop cracks or faults that let water in.
Installation Considerations
The way we install hollow and solid composite boards can change how well they perform and how long they last. Choosing the right steps makes our deck safer and makes sure we follow the manufacturer’s directions.
Cutting and Fastening
Hollow composite boards are lighter and often simpler to cut since they have less material inside. A standard wood saw works well, but blades with more teeth leave a smoother edge. When we install these, it’s important to choose fasteners meant for hollow boards—hidden fasteners are popular because they keep the look clean and help hold the boards steady.
Solid composite boards are heavier and may need a bit more muscle to move and cut. A sharp, carbide-tipped blade is best as it reduces chipping and helps us get through the board smoothly. Fastening solid boards is pretty straightforward, and we can use either top screws or hidden fasteners. Screws must be spaced properly to avoid splitting, and pre-drilling is often recommended, especially near the ends.
If we’re working in cooler weather, it’s smart to leave extra space between boards for expansion. Following the board maker’s directions for both types keeps everything tight and tidy.
Joist Spacing Requirements
The frame underneath a deck—called the joists—supports the boards. Solid composite boards are stronger, so we can usually place the joists every 16 inches (about 40 cm) apart for common residential use.
Hollow composite boards can be more flexible. Because of this, we often have to set the joists closer, usually every 12 inches (about 30 cm). Tighter spacing gives the boards better support so they don’t sag or bounce when walked on.
If we’re running the boards diagonally across the frame, it’s best to make the joist spacing even tighter to prevent flex. Always check the manufacturer’s guide for the exact spacing—following it reduces the risk of problems later, like wobbly boards or warranty issues. Taking care with the frame now saves a lot of headaches down the road.
Cost Comparison
Price is a big part of any deck project, and composite boards come in different styles that can impact the overall cost. We should look at both the price of the boards themselves and what we might pay for installation.
Upfront Material Costs
Solid composite boards usually cost more than hollow boards per foot. This is because solid boards use more material and tend to feel heavier and sturdier in the hand. For example, the average price for a solid composite board might range from $9 to $16 per linear foot, while hollow options usually run between $7 and $12 per linear foot.
Buyers on a budget might lean towards hollow boards for larger projects. However, there are often bulk discounts for bigger orders, so final pricing can change depending on how much decking we’re planning to build. Here’s a quick comparison:
| Type | Price per Linear Foot (approx.) |
|---|---|
| Solid | $9–$16 |
| Hollow | $7–$12 |
We might also pay more for premium finishes, colours, or extra-long boards with either style.
Labour and Installation Expenses
Labour costs can be a bit higher for solid boards. They weigh more, so moving and cutting them takes more time and effort. Sometimes, solid boards may need extra bracing or support, especially for bigger spans.
On the other hand, hollow boards are lighter, making them easier and faster for crews to install. This might mean less time and possibly lower wages paid for labour. However, if we’re building in a spot with lots of curves or custom shapes, hollow boards can require special fasteners to prevent cracking at the ends, which may nudge the price up again.
It’s a good idea to check with our installer on local rates and ask if they charge differently for hollow versus solid boards. Labour rates in Canada can vary from $3 to $8 per square foot, depending on the board type and the job’s complexity. For a flat, simple deck, hollow boards might keep installation costs down compared to solid boards.
Performance in Canadian Climates
Canadian weather can be extremely tough on decks. We need to think about how composite boards will handle moisture, frost, and constant changes in temperature.
Resistance to Moisture and Frost
Moisture’s a big deal for decks in Canada, especially when spring thaws hit or the rain just won’t quit. Solid composite boards usually do better with water. Why? Fewer gaps, fewer places for water to sneak in. Hollow boards can let water collect inside, and if installers aren’t careful, that sometimes leads to swelling, cracking, or even a bit of mould.
Frost and freeze-thaw cycles are no joke either. If water gets inside hollow boards and freezes, the expansion can split or warp them. Solid boards don’t offer water many hiding spots, so this is less of a problem. Still, both types need decent installation and drainage—otherwise, trouble finds a way.
Here’s a quick comparison:
| Board Type | Water Resistance | Freeze/Thaw Durability |
|---|---|---|
| Solid | Higher | Higher |
| Hollow | Lower | Lower |
If you live near a lake or get buried in snow every winter, solid boards could save you some stress.
Thermal Expansion and Contraction
Canadian weather loves to keep us guessing. Hot summers, freezing winters, and everything in between. Both hollow and solid boards expand and contract, but not in the same way. Solid boards, being denser, don’t move as much with temperature swings. They stay more stable, so you get fewer gaps or buckling over the years.
Hollow boards are lighter, with more air inside, so they expand and contract more. Sometimes you’ll hear them creak or shift as the weather changes. If you don’t leave enough space when installing, they might press against each other and start to warp or loosen up.
If you’re building a deck where temperatures swing wildly (so, most of Canada), leave a bit of extra space when using hollow boards. Planning ahead means the deck will look good and hold together, even as the weather does its thing.
Maintenance Needs
Choosing between hollow and solid boards? Think about how much effort you want to put in to keep your deck looking sharp.
Solid composite boards are tough. Sweep or wash them now and then, and you’re set. Dents and cracks? Not something you’ll worry about much.
Hollow boards are lighter, but sometimes leaves or dirt sneak into the holes. You might have to check the ends and clean them out. Not hard, just something to keep in mind.
Here’s a quick look:
| Feature | Hollow Boards | Solid Boards |
|---|---|---|
| Surface Cleaning | Easy | Easy |
| Inside Cleaning | Sometimes needed | Not needed |
| Repairs | Easier to replace a board | Less likely needed |
Both types need a good cleaning a few times a year. Soft brush, power washer on low, gentle soap and water—most stains come right off.
No sanding, staining, or sealing required. Composite boards really do save time compared to wood. You get to enjoy your deck more, unless you’re one of those people who actually likes cleaning (hey, no judgment).
Eco-Friendliness and Sustainability
Talking eco-friendliness? Both hollow and solid composite boards usually beat out traditional wood. Most composites use recycled plastics and wood fibres. So, fewer trees get cut, and plastic waste finds a new purpose.
Let’s compare:
| Hollow Boards | Solid Boards | |
|---|---|---|
| Recycled Content | Usually high | Often high |
| Weight | Lighter (less material) | Heavier (more material) |
| Resource Use | Uses less composite per board | Uses more composite per board |
Solid boards use more material, so they need more resources to make. Hollow boards need less, which can make them a little more sustainable in that sense.
Both options skip the need for stains, oiling, or harsh chemicals. Just wash with soap and water—simple.
If you’re after the greenest choice, ask the manufacturer about recycled content and eco-friendly practices. Not every brand is the same, but a lot of companies are trying to do better these days. Worth checking before you buy.
Situational Recommendations
Picking between hollow and solid composite boards? It really comes down to where and how you’ll use them. Different spots need different strengths.
Best Uses for Hollow Composite Boards
Hollow boards shine in low-traffic decks, apartment balconies, and rooftop patios. They’re lighter, so hauling them up stairs or installing in tight spaces is a breeze.
They do well in places with mild weather. But for decks with heavy furniture, hot tubs, or lots of foot traffic? Not really their thing. They’re budget-friendly too, so if you’re watching costs, hollow boards can help.
Best situations for hollow boards:
- Balconies without heavy loads
- DIY projects where weight matters
- Decks with good drainage and simple designs
Ideal Applications for Solid Composite Boards
Solid composite boards are the heavy hitters. If your deck sees a lot of action—grills, big patio sets, crowds—these boards handle it. They last longer in busy spaces and stand up better to daily wear.
They’re perfect for ground-level decks, pool surrounds, and commercial spots. Harsh weather? They don’t mind. The solid feel underfoot even gives a more classic wood vibe, which some folks really like.
Solid boards work best for:
- High-traffic backyard decks or patios
- Ground-level installations
- Exposed areas facing tough weather
- Spaces with frequent heavy use
Frequently Asked Questions
People ask a lot about hollow vs. solid composite boards. Here are some common questions and what we’ve found.
What are the primary differences in durability between hollow and solid composite boards?
Solid boards are denser and can take more impact over time. Hollow boards are lighter, but they might crack more easily if you handle them roughly or don’t support them right.
Can the weight load capacity vary between hollow and solid composite decking?
Absolutely. Solid boards support more weight. We suggest solid boards for high-traffic or heavy-use spots. Hollow boards fit best in lighter-load areas, like a balcony or a quiet corner.
Is there a significant cost difference when installing hollow versus solid composite decking?
Hollow boards usually cost less to buy and ship—they’re lighter, after all. Solid boards are a bit pricier. Labour costs are about the same, unless your project is especially complicated.
Are there any noticeable visual distinctions between hollow and solid composite decks after installation?
Honestly, most people can’t tell the difference once the boards are down, especially if you use end caps on hollow boards. Sometimes hollow boards sound a little different underfoot, but looks-wise, they’re pretty close.
How do maintenance requirements compare between solid and hollow composite decking?
Both are low-maintenance compared to wood. Solid boards hide scratches better because they’re denser. Hollow boards are easy to clean, but the open ends might collect dirt if you don’t cap them.
What should I consider regarding the longevity and weather resistance of hollow versus solid composite boards?
Solid boards generally last longer—at least, that’s what most folks notice, especially when you throw Canadian winters into the mix. They deal with moisture and freezing temps without much fuss. Hollow boards do alright too, but they’re a bit more likely to shift or expand if water sneaks inside. If you’re leaning toward hollow boards, grabbing some end caps isn’t a bad move.