Two banner stocks, one decision — and getting it wrong in either direction costs you. Quote 13oz where 15oz was needed and your client's double-sided banner ghosts the reverse image through the front. Quote 15oz where 13oz was fine and you've padded the price for nothing. Here's the decision, cleanly.
Stock context and the full banner capability picture: Wholesale Banner Printing Guide.
What the Numbers Mean
Banner vinyl is measured in ounces per square yard — a weight that proxies for thickness and durability:
- 13oz scrim vinyl — the industry-standard banner material: polyester scrim reinforcement laminated in PVC, strong, flexible, excellent print surface
- 15oz blockout — heavier construction with an opaque core layer that light cannot pass through
That opaque core is the real differentiator — "blockout" is the feature, the extra 2oz is just how it's built.
Quote 13oz When...
- The banner is single-sided (the vast majority of orders)
- It hangs against a wall, fence, or building — anything with a backing
- It's temporary or seasonal retail work: Vinyl Banners for Grand Openings & Retail
- Budget matters and conditions are normal
13oz is the correct default. It prints beautifully, survives outdoor use, and covers 80%+ of banner applications without compromise.
Quote 15oz Blockout When...
- The banner is double-sided — this is non-negotiable; without the opaque core, side B's image ghosts through side A whenever light hits the back
- The banner hangs where light passes behind it — suspended in windows, across walkways, between poles with sky behind
- The install is pole-mounted street banners — double-sided by nature and wind-stressed
- The client needs the most durable option for long-duration or high-stress outdoor placement
The One-Question Sort
"Will anyone see the back of this banner, or will light shine through it?"
Yes to either → 15oz blockout. No to both → 13oz. That single question resolves nearly every quote, and asking it out loud positions you as the expert.
The Finishing Interaction
Stock and finishing decisions travel together: double-sided 15oz street banners typically take pole pockets; single-sided 13oz storefront banners take hems and grommets. The finishing half of the decision: Grommets vs. Pole Pockets. At very large sizes, weight compounds — a grand-format 15oz banner is meaningfully heavier to rig, which matters for the oversized work covered in Large Format Event Banners.
The Margin Note
The 15oz upgrade carries a modest wholesale premium and a legitimate story ("opaque core so your double-sided print stays crisp") — it's an honest upsell where conditions call for it, and quoting it correctly the first time prevents the ghosting complaint that no discount fixes afterward.
Frequently Asked Questions
What's the difference between 13oz and 15oz banner material? Weight and construction: 15oz blockout adds an opaque core layer that blocks light — essential for double-sided printing. 13oz is the standard single-sided stock.
Can you print double-sided on 13oz vinyl? It's not recommended — without a blockout core, the reverse image shows through in daylight. Quote 15oz for all double-sided work.
Is 15oz worth it for single-sided banners? Only in special conditions (backlit placement, extreme durability needs). For normal single-sided use, 13oz is the right quote.
Do both stocks print at the same quality? Yes — both take the same high-resolution print. The difference is construction, not print quality.
Quote the right stock the first time. Create your trade account or request a quote.