Diamond Stitching: How to Sew a Diamond Quilted Cushion

X-HT-300602

Dress up a cushion cover and add some style and interest with diamond quilting. What are diamond quilts? It's a technique of sewing crisscross stitch lines to form diamond shapes in a piece of fabric. It's an easy way to take a plain cushion or upholstery piece to the next level.

Video Chapters:

Intro — 0:00 min.
Measuring for Cushion — 1:14 min.
Cutting Foam to Size — 4:59 min.
Discussion of Foam Density — 7:21 min.
Cutting Plates — 12:11 min.
Measuring & Cutting Boxing — 15:14 min.
Creating Zipper Plaque Boxing — 18:20 min.
Quilting Diamonds in Top Plate — 25:36 min.
Creating Match-Up Marks — 41:39 min.
Sewing Zipper Plaque to Boxing — 43:22 min.
Sewing Boxing to Top Plate — 46:26 min.
Transferring Match-Up Marks to Boxing — 56:39 min.
Sewing Bottom Plate to Assembly — 58:34 min.
Inserting Foam — 1:04:01 min.
Materials & Tools List — 1:08:53 min.

Materials List:

CushionRite^® Premium Foam (Medium) #124234
Cushion Underlining Black 54" Fabric #772100
EverSoft™ Indoor/Outdoor Navy 54" Vinyl Fabric #122214
Seamstick 1/4" Basting Tape for Canvas & Upholstery (36 yds.) #122065
YKK^® Continuous Zipper Chain #5 Black (Coil Chain) #104444
Thread from Sailrite - we used Tex 90 Polyester
YKK^® Zipper Slider #5 Black Metal Single N/L Pull Tab (Coil Chain) #122251
Fabric Backed 1/4" Sew Foam 58" (5 yds.) #124306
3M™ General Trim Spray Adhesive 18.1 oz. #73211
Cushion Wrap Silk Film 54" (10 yds.) #103933

Tools List:

Sailrite^® Blade Foam Saw V2 with Carrying Case (110V) #121244
Scribe-All^® Water Soluble White Marking Pencil #120681
Gingher^® 8" Scissors Right Handed #19104
Deluxe Tape Measure 120" #123120
Clear Acrylic Ruler 6" x 24" #102400
Sailrite^® Ultrafeed^® LSZ Walking Foot Sewing Machine #311602
Sailrite^® Ultrafeed^® Industrial Sewing Table #120934
Deluxe 5-1/2" Magnetic Sewing Guide #103597
Chalk Pen White #123131
Ergonomic Thread Snips #102991
Tape Measure, Marker, L Square, Straight Edge, Stapler, Shop Vac

It may look complicated, but if you can sew a straight line you can add diamond stitching — also known as diamond pleating — to your next cushion project. In today’s video, we’re making diamond quilted cushions for the dinette seating area in an RV. Let’s get started.

DIY Diamond Stitch Cushion 2 — The diamond stitching adds style and interest to vinyl dinette cushions.

Diamond pleating is most often seen in vinyl and leather upholstery. For our RV cushion, we’re using beautiful EverSoft™ Indoor/Outdoor Vinyl Fabric. EverSoft is a great choice for RV seating, as well as cushions and upholstery on your boat, patio and in your home. The vinyl fabric adds a high-end, leatherlike look to your application while remaining mold and mildew resistant and easy to care for. The fabric’s unique four-way stretch properties make it incredibly easy to contour and shape during upholstery work.

At Sailrite®, we take the intimidation out of DIY. Our Fabric Calculator calculates how much fabric, foam and zipper chain you need, as well as the other materials you need to make your cushion. The calculator renders the dimensions of your cushion panels and even adds seam allowances for you. It’s an incredibly useful tool that’s available for free on the Sailrite website.

We hope you enjoyed this cushion tutorial video. This video is for the seat cushion on this RV's dinette bench seating area. Click here for the companion video on how to make the coordinating backrest cushions.

You should also explore the other videos in our RV Renovation Series. We’re renovating an RV from top to bottom, inside and out. You don’t want to miss any of the exciting projects in this series. The “before and afters” are truly incredible!

If you want to view more projects in our RV Renovation Series, click here!