How to stretch a large canvas – with Corey D'Augustine | IN THE STUDIO, by The Museum of Modern Art on YouTube. 6 min 38 s.
- Video length
- 6 min 38 s
- Time to do it
- 1 to 2 hours
- Difficulty
- Medium
- Steps
- 8
What you need
Steps
Lay the four stretcher bars on a flat floor and push the interlocking ends together to form a rectangle. Check the corners with a square, or measure both diagonals and adjust until they match.
For a large canvas, fit cross braces or a center bar inside the frame and secure them with the supplied keys or staples. This keeps the long sides from bowing when you pull the canvas tight.
Cut the canvas about 3 to 4 inches larger than the frame on every side. For a very large piece, leave closer to 4 inches so you have enough fabric to grip and fold at the corners.
Center the canvas over the frame and staple it once in the middle of one long side, about 1 inch from the edge. Pull the canvas across to the opposite side, stretch it firmly with canvas pliers, and staple the middle there.
Work outward from the center staples, adding staples every 2 to 3 inches along each side. Alternate sides as you go and pull with the pliers before each staple so the tension stays even.
Stop about 2 inches from each corner. Fold the corner fabric into a neat triangle, pull it tight, and staple it down, then finish the remaining edge staples.
Turn the frame over and check the surface with your hand. If it feels loose or shows ripples, remove staples and re-stretch that area before moving on.
If you plan to paint, apply one or two coats of gesso with a wide brush and let each coat dry. Sand lightly between coats for a smoother surface.
Tips and common mistakes
Use heavy-duty stretcher bars and add braces for large sizes, because thin bars can warp under strong tension.
Pull evenly and alternate sides; over-tightening one edge can twist the frame and make the canvas sit crooked.
Wear eye protection when using a staple gun and keep your fingers behind the tool, away from the staple path.
Questions
How tight should the stretched canvas be?
It should feel taut like a drum with only a little give when you press it. If the frame starts to bow, loosen the staples slightly.
Should I prime the canvas before or after stretching?
Most painters stretch first, then prime, because priming stiffens the fabric and can make folding the corners harder. Prime after stretching for a cleaner edge.
Can I stretch a large canvas by myself?
Yes, but a helper makes it easier to keep the canvas centered and the tension even. Use canvas pliers so you can pull firmly without hand strain.
This guide was drafted from the video's details and general task knowledge. It has not been checked against the full video. Check the video and relevant product instructions before following a procedure. Report a correction.
