Place a long straightedge down to draw a marker line on the back of the carpet where a straight cut is required and then keep the straightedge on that line as you make the cut.
The carpet needs cutting.
Work a few feet at a time.
Unroll the carpet as you go separating it into more manageable strips.
Use sharp utility knife which is key to making a clean cut.
Pull the edges off the tack strip along the wall and roll up the carpet piece to be discarded.
Cut through the painter s tape and carpet with a utility knife.
You may need to change the blade several times during a large carpet project.
It s usually easier to cut carpet from the back so when cutting it into small sections fold a section over revealing the back then slice through the woven backing with a utility or carpet knife.