How to Make a Frame for a Painting on Canvas (and When Not To)

♦ ♦ ♦ JUNE 17, 2026 | 4 MIN READ How to Make a Frame for a Painting on Canvas (and When Not To) At a Glance Making a frame for a painting on canvas comes down to one decision a supply tutorial skips: build a float frame that holds the canvas from behind and never lets the wood touch the painted face. Here is how, and when to leave the canvas bare. I keep a few lengths of poplar leaning in the corner of the studio for exactly this. A canvas comes off the wall finished, and the first question is whether it wants a frame at all, and if it does, what kind. For a contemporary painting on stretched canvas the answer is almost always the same object: a float frame, sometimes called a floater. It is the one frame built around how a painting actually works instead of around how a window looks. So when people ask how to make a frame for a painting on canvas, I start by ruling out the frame most people picture. The traditional frame has a rabbet, a lip that overlaps the front edge of the artwork to hold it in place. On a painting, that lip is the problem. What you’re actually building: a float frame for a painting on canvas A float frame is a shallow open box, a little deeper and slightly larger than the canvas, that the canvas sits inside with a small band of empty space all the way around. The canvas hangs off the back of the frame, screwed to it from behind, so from the front the painting seems to float just inside the wood with a clean shadow line between them. The build is simple carpentry. Four lengths of wood (poplar or a hardwood grips a screw better than pine), cut to an L-shaped profile so there is a back lip to attach to and a front wall standing taller than the canvas is deep. Miter the corners at 45 degrees, glue and clamp, reinforce the joints, and finish the wood before the canvas goes anywhere near it. Then hold the frame against the back of the canvas and drive screws into the stretcher bars from behind. American Frame’s own guide says it plainly: the screws go “through the pre-drilled holes on the frame and directly into the stretcher bars of the canvas.” Nothing ever pierces the front. Why a float frame should never touch the painted face This is the part a tutorial written for posters gets wrong, because a poster has no edge worth protecting. A painting does. On most canvases I stretch, the image keeps going around the sides. The painted edge is part of the picture, a finished surface, not a raw margin to hide. A rabbet lip clamped over that edge does two bad things at once. It crops the painting, and it presses bare wood against a paint film that is still moving. Oil cures by oxidation for the better part of a year, and the varnish keeps off-gassing after that, so anything held flat against the surface can stick, dent, or leave its own mark months later. The float frame solves it by never touching the face. The canvas is carried from behind, the front wall stands just proud of the surface without leaning on it, and the open band around