Grommets, Hems, and Why Banners Tear

A banner almost never fails in the middle. It fails at the edge, where something is pulling on it — and that's entirely a question of how the edge was finished.

Here's what the two finishing options actually do, and when each is worth paying for.

What a hem is

A hem is the vinyl folded back on itself around the perimeter and heat-welded down, so the outer inch or so of the banner is double thickness.

On its own a hem does nothing visible. Its whole job is to give the grommets something substantial to grip. Punch a metal eyelet through a single layer of 13 oz vinyl and put it under load, and eventually it tears out, taking a chunk of your banner with it. Punch it through a doubled, welded edge and it holds.

A hem also stops the edge fraying, which matters more than it sounds if the banner is going to live outside for a season.

Hemmed edges — $6, flat, whatever size you order.

What grommets are

Grommets are the metal rings punched through the banner so you have something to tie to. We offer three choices:

No grommets. The banner arrives as a clean rectangle. Right if you're mounting it to a rigid backing, taping it to a wall indoors, or you have your own mounting system.

Corner grommets — $2. One in each corner. Fine indoors, fine for anything small, fine for a short span where the banner isn't going to catch wind.

Border grommets — $3. Eyelets spaced every couple of feet all the way round. This is what you want for anything outdoors and anything wide.

The extra dollar between corner and border grommets is the best dollar in our catalogue. Corner grommets on a wide outdoor banner concentrate all the load into four points, and the middle of the banner bellies out and flaps. Flapping is what kills banners — not the wind itself, but thousands of flex cycles at the same crease.

What to actually order

Indoors, small, short-term — a birthday party, a table front, a room sign. No grommets or corner grommets, no hem. It's hanging for an afternoon.

Indoors, large, or reused — a church hall banner that goes up several times a year. Border grommets and a hem. The hem matters more than you'd think for something that gets rolled and unrolled.

Outdoors, anything — border grommets and a hem. Every time. This adds $9 to the order, and it is the difference between a banner that lasts a season and a banner that lasts a weekend.

Outdoors, exposed and large — a road-facing banner on an open frontage, a construction fence, a sports field. Border grommets and hem, and give us a call before you order. There are things we can do about how the banner is built for exposed spans, and a conversation beforehand is worth more than any add-on.

Hanging it so it survives

Leave slack. The most common installation mistake is stretching a banner drum-tight because it looks neater. A taut banner has nowhere to absorb a gust — all the force goes straight into the grommets. Leave it slightly loose so it can move.

Use bungees outdoors, not zip ties. Zip ties are rigid. Bungee cords or elastic loops let the banner give in a gust and spring back. If you only have zip ties, don't cinch them fully closed.

Use every grommet. People pay for border grommets and then tie four corners. Thread all of them — that's the entire point of spacing them out.

Rope through the hem is not a substitute. A rope run through a hem without grommets concentrates load unevenly. Use the grommets.

Against a wall, mind the gap. A banner flat against a solid wall barely moves. One mounted an inch off a wall acts like a sail. Fix it close, or fix it at every grommet.

Taking it down and keeping it

Roll, don't fold — print side out, around a tube if you have one. A fold leaves a crease that stays visible and becomes the point the vinyl eventually cracks.

Wipe it down with mild soap and water before storing. Dirt left on vinyl through a winter tends not to come off in spring. Store it somewhere dry, indoors, and unrolled it'll look close to new next season.

If something goes wrong

If a grommet pulls out, an edge fails, or the banner arrives damaged or not as you approved it, send us a photo within seven days of delivery and we'll reprint it or refund you — your choice. No return shipping, no forms.

Questions before you order: 336-899-6112 or hello@miracleprints4u.com.