Dometic Universal Patio Awning Fabric Onyx 15 ft Black Weathershield

If your RV's patio awning fabric has faded to chalk, split along a seam, or picked up one too many tears from a windy afternoon at the campground, this is the replacement that gets you back in the shade. The Dometic B3314989NR.315 is a universal patio awning fabric cut for a 15 foot awning with an 8 foot extension, finished in Onyx with a black vinyl weathershield. It's a one-piece fabric, so the main canopy and the protective weathershield come as a single sewn unit. No separate pieces to line up.

Here's the thing most folks don't realize until they're standing under a torn awning: the fabric wears out long before the arms and hardware do. The aluminum arms, the roller tube, the mounting brackets, all of that is usually still perfectly good. It's the vinyl that takes the beating from sun and rain season after season. So you don't need a whole new awning. You need new fabric. That's exactly what this is, fabric only, sized to drop into a universal-arm patio awning setup.

A quick word on sizing, because RV awning measurements trip people up. That 15 foot number refers to the awning's rail or arm measurement, not the exact width of the cut fabric. The actual canopy runs a few inches shorter than the nominal size so it seats properly between the arms. The 8 foot extension is how far the awning reaches out from the coach when it's rolled all the way open. Measure your existing awning by the rail, match the numbers, and you're in the right ballpark. If you're between sizes, measure twice before you order.

The material is vinyl, which is the workhorse choice for RV awnings. Vinyl wipes clean with soap and water, sheds rain instead of soaking it up, and holds its color against UV a lot better than an untreated fabric would. Spilled soda, tree sap, a muddy dog shaking off underneath it, none of that fazes vinyl. You hose it down and move on. The Onyx colorway is a deep, neutral dark tone that pairs with just about any coach paint, and the black weathershield keeps the look consistent when the awning is rolled up tight.

So what does the weathershield actually do? When you retract the awning, the outer wrap of fabric is the part that sits exposed to the weather, taking sun and road grime while everything's rolled up. The weathershield is that protective outer layer, and here it's finished in black. Because this is a one-piece design, the weathershield is part of the same fabric run as the canopy, not a bolt-on accessory. Less to fuss with, one less seam to fail.

Installation is a two-person job, but it's well within reach for a handy owner. You'll slide the old fabric out of the roller tube and the awning rail, feed the new fabric through the same channels, and re-tension the roller. Take your time with the spring tension on the roller tube, that's the part that bites careless hands. If you've never done it, plan for an afternoon and grab a friend. Plenty of RVers knock this out in their own driveway with basic tools.

One thing to be clear about: this is the fabric only. It doesn't include arms, the roller tube, brackets, or hardware. If your awning frame is bent or the arms are seized, you'll want to sort that out separately. But if your hardware is sound and it's just the vinyl that's shot, this fabric brings the whole awning back to life for a fraction of what a complete replacement runs.

This is an RV and patio awning part, not marine gear, so don't try to press it into service as a boat cover or Bimini fabric. It's built for a coach parked at the campground, giving you a shaded spot to set up chairs, run the grill, and wait out an afternoon shower. For that job, sized right, it's a straightforward fix.