The honest answer is "it depends" — but that's not useful, so here's the actual breakdown based on what I've seen on job sites over the last twenty years and what the current market looks like for a typical residential project in 2026.
Material cost
Vinyl deck membrane material runs roughly $3 to $7 per square foot at retail, depending on the brand and thickness. A handful of manufacturers publish pricing directly on their websites. Most don't — you have to ask a dealer, and the number usually arrives wrapped inside a full quote rather than itemized.
Thicker membranes (68mil) don't cost much more than standard (60mil). The difference in material is maybe a dollar per square foot. If a dealer tells you it's a huge premium, they're marking it up.
Installed cost
Installed, you're looking at $12 to $22 per square foot for a straightforward balcony or rooftop deck. That bundles:
- Material — $3-$7/sq ft
- Substrate prep — $2-$5/sq ft (depends on what's under the old deck)
- Labour — $5-$10/sq ft (the biggest variable)
- Installer margin — $2-$4/sq ft
On a 200 sq ft balcony, that puts you in the $2,400 to $4,400 range for a turnkey job. Anything under $2,000 is a yellow flag — somebody's cutting a corner, usually on prep. Anything over $5,000 for a standard balcony is either unusual complexity or a dealer marking it up.
Why quotes vary so much
Three factors drive 80% of the variance:
Substrate condition. If the plywood underneath is rotted or sloped wrong, a lot of labour goes into fixing it before any membrane goes down. You can't skip this. A deck installed over bad substrate will fail in year five regardless of how expensive the vinyl was.
Complexity. Railings, posts, drains, scuppers, and any weird geometry take real time to flash properly. A simple rectangular balcony is a different job from a wrap-around with three posts and a drain.
Regional labour rates. Vancouver is not Saskatoon. Seattle is not rural Washington. Labour can swing $3-$5/sq ft depending on where you live.
The quote decomposition trick
If a dealer quotes you $18/sq ft all-in on a brand whose material price is public, you can roughly break it down:
- Material: ~$4
- Everything else: ~$14
If they quote $22/sq ft, the extra $4 is either going into substrate work (fair) or into their margin (your call). When pricing is bundled and opaque, you can't tell which. When the material price is public, you can.
This is the single biggest reason I prefer manufacturers who publish material pricing. It's not about getting a cheaper deck — it's about being able to judge whether you're getting a fair one.
What you should budget
For planning purposes, assume $18/sq ft installed for a standard balcony or rooftop deck. That gives you margin for the substrate work nobody mentions up front. If your final quote comes in under that, great. If it comes in significantly over, ask what's driving it.
Always get two quotes. Always ask what the material cost is separately. Always ask whether the substrate needs work and what that adds.
