Once the warp has been completed, it is time to transfer it onto the back roller, ready to be attached to the loom. Each section from the warping mill is tied to the back roller, keeping the tension of the warp and then the back roller is turned, winding the warp from the warping mill and onto the roller.
Irons are placed under the warp as it builds, helping to keep the width of the warp and preventing it from spreading and losing tension. The back roller keeps turning until the whole warp has been transferred. Once the beginning of the warp has been reached, the leash ropes can be replaced by leash sticks to help maintain the leash and keep the ends in place for threading through the heddles.