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Welcome Canadians! → start here

Despite their complex look, groin arches are simple to drywall

How to Install Drywall for Groin Arches

Groin arches, also known as double barrel vaults, are made up of two intersecting barrel vaults that share the same height. These are by far the most impactful ceiling kits we have, so it’s no wonder they’re also the most popular. Our groin arches have been installed in hallways, dining rooms, kitchens and master bedrooms throughout the country. And they can even be retrofitted into existing construction, so it’s never too late add groin arches to your ceiling. People usually get that installation is easy, but they tend to worry about the drywall process. Have no fear; we’ll provide you with step-by-step instructions so it won’t be much more difficult than drywalling a standard wall.

But before you get started, let’s talk about your choice of drywall. We recommend using a double layer of 1/4 –inch flexible drywall, so it’s easy to bend into place. If you really have your heart set on ½-inch boards, you’ll have to wet them from the back in order to help them bend without breaking. Okay, now let’s roll up our sleeves and get to drywalling these groin arches. Here’s how it’s done:

  1. Measure the length from the side of the groin arch to the center. This will determine the length of the cut you’ll need for the drywall. If it’s longer than 96 inches, of course, multiple panels of drywall will be needed to complete the job.
  2. Measure the curved length of each curved strut from its center to its tip. Then measure from the side of the groin vault to each strut tip. These dimensions are the layout measurements.
  3. Transfer your layout measurements to the drywall and mark a line that intersects where the center and side measurements meet.
  4. Cut the drywall along this line.
  5. Prop the drywall up against a wall and slowly bend it downward until a curve is formed.
  6. Align the drywall to the groin vault and firmly press it up against the curvature.
  7. Screw the drywall in place.
  8. Repeat these steps along the same side of the groin vault until the corner is drywalled (measure, cut, bend, repeat).
  9. Trim and shave the drywall where needed so that the diagonal cut of the drywall matches up evenly with the groin strut tips.
  10. Repeat these steps for all sides of the groin vault, and then continue repeat the process for any other groin arches you have installed.
Now, all that’s left to do is to add some tape and mud and you’re ready to paint. As you can see from this finished hallway, installing and drywalling groin arches is worth every bit of effort.

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