Large light vinyl deck with white aluminum glass railing and a view over the water to the islands

Vinyl, composite or wood? in Shawnigan Lake and the Cowichan Valley

Vinyl vs composite vs wood decking: three decks, three different jobs

Between the traditional wood crowd, the sleek composite fans and the people swearing by vinyl, it is easy to get overwhelmed. Here is how I see the three.

A lot of people confuse vinyl decking with PVC planks, but they are completely different animals. True vinyl decking is a heavy-duty, continuous waterproof membrane that is glued and sheet-welded directly onto a plywood subfloor.

Drone view of a long vinyl deck over a carport on a blue house, black railing all around

Vinyl decking

Personally, I do a lot of vinyl work, and I love the fully waterproof nature of it. It does something that neither wood nor composite can ever do.

If your deck is up high, an elevated second storey, or sitting over a walk-out basement, that 100% waterproof seal means you get a bone-dry storage space or a covered patio underneath.

The good

Fully waterproof, with dry space underneath
Your frame stays bone dry, which protects your investment
Newer patterns look like indoor flooring, outside
Vinyl decks we build
Two-tone composite deck boards beside a cedar pergola

Composite decking

If you want a traditional plank look but hate the idea of spending a perfectly good summer weekend with a paint roller, composite is usually where people look next. These boards blend wood fibres with recycled plastics to create a solid, heavy-duty plank.

The good

Deep wood grain finishes that hold their colour for decades
The boards don't splinter and don't rot
Upkeep is a simple soap and water wash

Keep in mind

It's expensive, easily double the material cost of wood
The boards grow in the heat. Cut them on a hot day without allowing for it, and you get big, ugly gaps once the weather cools
Composite and wood decks
Cedar deck with stairs and a pergola beside a stucco house

Pressure treated wood

Pressure treated is usually the default option, because the price tag is friendly compared to the alternatives. If you like the natural warmth of wood grain, nothing else gives you that.

The good

The most affordable upfront cost
Looks good right after it's built
Forgiving to work with if you're a DIYer

Keep in mind

Endless upkeep. The wood moves, warps and splinters, so over its 15 to 20 year lifespan you're in a cycle of pressure washing, sanding and staining to keep it looking good and stop it rotting out
Composite and wood decks

Side by side

Vinyl

Waterproof
Yes, a sealed membrane
Underneath
Dry storage or a covered patio
Looks
Flooring-style patterns
Upkeep
An occasional wash
Upfront cost
Ask for a quote

Composite

Waterproof
No, water drains through
Underneath
Gets wet
Looks
Wood grain planks that hold their colour
Upkeep
Soap and water
Upfront cost
Highest, about double wood

Pressure treated

Waterproof
No, water drains through
Underneath
Gets wet
Looks
Natural wood grain
Upkeep
Pressure wash, sand and stain
Upfront cost
Lowest

Decking questions

Is vinyl decking the same as PVC decking?

No. PVC decking comes as planks. Vinyl decking is a continuous waterproof membrane, glued and sheet-welded onto a plywood subfloor, so the whole deck is sealed.

Can I use the space under a vinyl deck?

Yes. A vinyl deck is sealed, so the space underneath stays dry for storage or a covered patio. That's why it suits second-storey decks and decks over a walk-out basement.

Is composite decking worth the cost?

Composite easily costs double the material of pressure treated wood, but the boards don't splinter or rot and hold their colour for decades, so you skip years of sanding and staining.

How long does a pressure treated deck last?

About 15 to 20 years, as long as you keep up with pressure washing, sanding and staining so it doesn't rot out.

No single winner, just the right one for the job.

When you look at the three side by side, there isn't a single winner, just the right one for the job. Not sure which suits your deck? I'll talk it through with you when I come by to quote.

Your project is next.

(250) 701-5173
Hours
Mon to Sat, 7:30 am to 5:00 pm Sunday closed Emergency services available
Service area
Shawnigan Lake, Mill Bay, Cobble Hill, Duncan, Ladysmith and the Cowichan Valley
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