To make a canoe stabilizer, construct a bar longer than the width of the canoe, attach floatation devices to either end and mount the bar to the canoe. As it is lightweight, strong and durable, polyvinyl chloride piping is an ideal material to use for the frame. High buoyancy materials such as foam and Styrofoam are commonly used for the floatation devices.
Use 1-inch PVC pipe to construct the cross member that mounts to the canoe. Cut the PVC at least 24 inches longer on both ends than the canoe is wide. The longer the PVC pipe extends from each side of the canoe increases the stabilizing force that it provides. At each end of the PVC pipe attach a 90-degree PVC elbow with the appropriate adhesive and make sure that both elbows are pointing down evenly.
Attach a PVC T-joint to the end of each elbow so that it is perpendicular to the cross member and parallel to the canoe. Mount the floatation material to the T-joint with waterproof adhesive, zip ties or other strap material. Foam and Styrofoam work well for the flotation material.
Mount the cross member bar to the center of the canoe with metal clamps to complete the installation.