It will be nice and straight if you lay the bar and tack strip straight and are careful when trimming and tucking the carpet.
Tuck roll carpet edge.
Embed the carpet edge firmly in the tack strip and under baseboards by forcing the front edge of the carpet cutter into the carpet and dragging it along the wall.
In essence it is a bar of metal that spans the transition length and is formed like a z so that the edge of the carpet is tucked under one edge.
After tacking you tamp down the z bar to secure the carpet edge.
To turn and finish a carpet edge you use a carpet z bar along with tack strip.
Start by unrolling your carpet and then take it up at one edge and pull it until you have the carpet as flat as possible.
There are other designs besides the one shown in this image.
Use the carpet kicker and stretch the carpet over the tacks and past the tack strip by 1 4 inch.
Turn the carpet face down and place a metal straight edge along the edge of the carpet to be folded.
Step 4 hold the straight edge firmly in place.
Step 5 tuck the end of the carpet into the gap between the tack strip and the tile by using a stair tool or a putty knife.
This is screwed or nailed to the floor and the.
Tap the carpet kicker to stretch the carpet in place over the padding and tack strip.
Cut the carpet with a slotted blade knife so that it is even with the edge of the tile.
Pull the edge of the carpet back 1 to 2 feet so you can see the underlying subfloor which may be concrete or plywood.
Place most of your weight on your hand over the tack strip area.
Apply pressure downward on the carpet when stretching it so that it adheres to the tack strip.
Cut the edge of the carpet so that it reaches the edge of the tile perfectly.
Tuck the extra edge of the carpet under the gap and use the hooks of the transition strip to hold it in place.
Step 3 measure the width of the doorway using a tape measure and then cut a carpet tack strip to the same width using tin snips.
Pull the carpet over the top using a knee kicker.
Turn the carpet edge around and you should be able to roll it into a suitable pipe shape.
Start from the back side applying the tape where the carpet edge meets the center line of the tape that way you can fold the tape onto the top side.
If there s already a carpet there cut it just a few inches longer than where you want to meet the tile.
Make sure that the carpet is rolled up neatly so that you have a good starting position for your roll edge process.
If the straight edge is wide and long enough kneel on it with one knee to hold it down.
Vacuum the subfloor to remove all dirt and grit.