Vinyl banner weights explained: 10oz vs 13oz vs 18oz blockout

When you order a custom vinyl banner online, the first decision after size is weight — usually offered as 10oz, 13oz, or 18oz blockout. The product page rarely explains what those numbers mean for you in practice, which leads to a lot of customers either underspending (and getting a banner that wrinkles after a week of wind) or overspending (paying for blockout vinyl on an indoor banner that didn’t need it).

Here’s the working guide.

What the weights actually measure

The number is the weight of the vinyl in ounces per square yard. So 13oz vinyl weighs about 13 ounces for a 9-square-foot piece — which is meaningful when you’re shipping a 10-foot banner across the country, but more importantly, the weight correlates with thickness, durability, and opacity.

• 10oz vinyl — the lightest standard weight. Thinner, more translucent, less resistant to tearing. Cheapest per square foot.
• 13oz vinyl — the workhorse of outdoor banner printing. Most banners you’ve seen at construction sites, retail storefronts, and trade shows are 13oz scrim vinyl. Best balance of cost, durability, and weight.
• 18oz blockout vinyl — heavy, thick, and crucially, has a black middle layer that prevents light from passing through the banner. This is the only weight that genuinely works for double-sided printing.

When 10oz is fine

10oz is the right answer when:

• The banner is indoor only — trade-show booths, retail interiors, classroom or event spaces
• The banner will be temporary — a single-event use, like a one-day conference backdrop
• You’re hanging it in a low-stress environment — flat against a wall, fully framed, minimal handling
• Cost matters more than longevity

10oz wrinkles more easily than heavier weights, and it’s noticeably more translucent, so anything backlit (or with bright light behind it) will show the structure on the other side. Don’t use it outdoors.

When 13oz is the right call (most of the time)

13oz is the default we recommend for almost every outdoor banner:

• Storefront banners that will hang for weeks or months
• Construction site banners that need to survive wind, rain, and rough handling
• Trade show backdrops that travel with you and get hung repeatedly
• Yard event signage for outdoor festivals, school events, fundraisers
• Any banner you’ll reuse rather than throw away

13oz scrim vinyl has a reinforcing polyester scrim baked into the middle, which means it resists tearing under tension. Grommets hold without ripping out. It takes the weather indefinitely without color shift. Most banners I’ve seen ordered at 10oz “to save money” come back as a reorder at 13oz within six months.

When 18oz blockout is mandatory

18oz blockout is more expensive than 13oz — usually 30-50% more per square foot — and you should only order it when the application demands it. Specifically:

1. Double-sided printing. If you print images on both sides of a banner without a blockout core, light passes through and shows the front design ghosted backwards on the back side. With a black middle layer, the two sides are visually independent. If you’ve ordered “double-sided” on 13oz before and been disappointed, this is why.

2. High-wind installations. Banners on building exteriors above ground level, banners across roads, banners hung between two poles in open areas — anywhere wind will be loading the surface for extended periods. 18oz handles wind better both because of its weight and because the heavier vinyl resists tearing at the grommet points.

3. Long-term outdoor placement. If a banner is going up for a year or more (semi-permanent restaurant signage, gym signage, ongoing campaigns), 18oz lasts noticeably longer in UV before showing fade.

4. Premium installations. Trade-show booths for major brands, executive office signage, anywhere the perception of quality matters as much as the function. 18oz simply feels more substantial.

What about the cheaper grades I see online?

Some vendors offer 8oz vinyl. We don’t print on it. It’s so thin that it tears at the grommets within a few weeks of normal handling, and the perceived savings disappear the first time you have to reorder. If your budget is tight, order a smaller 13oz banner instead of a larger 8oz one — better dollar-per-day-of-life return.

Quick recommendation matrix

• Indoor, single event → 10oz
• Indoor, long-term → 13oz
• Outdoor, single side, anywhere → 13oz
• Outdoor, double-sided → 18oz blockout
• Premium signage, long-term, exterior → 18oz blockout
• High-wind exterior → 18oz blockout

The grommet question

For any weight, our default is brass grommets every 24 inches around the perimeter, with welded hems on all four sides. That’s the spec for most installations. If your install method is different — pole pockets, sewn rope hem, no finishing — change it on the product page before you order. Adjusting after the banner is printed isn’t possible.

When you’re ready, the Signs & Banners collection has live pricing across every weight, plus rush production options for jobs that need to ship in 2-3 business days.