Foam backed carpet is best to use in an area that isn't used a lot or walked on constantly, so make sure it isn't in an area that has high traffic or rough treatment. Most foam backed carpets do not require padding, so it is great if you are short on time and money. You can usually roll out the carpet yourself, but if it gets too large ask some friends to assist you. Local carpet stores and warehouses always have inexpensive remnants and small pieces of carpet available if you are on a budget, which works out great if you want a hallway runner or small staircase. Get rid of that old carpet and bring in some new and soft carpets.
Remove your old carpet and any padding. Make sure that the floor or concrete underneath is clean of debris or dust.
Attach a wide strip of the double-sided floor to carpet tape around the edges of the room in order to hold the carpet in place and prevent any shifting or movement.
Begin at the longest, straightest wall so you can become comfortable with laying the carpet before you encounter any awkward angles or obstacles. Peel off the paper backing strip of the carpet tape in order to utilise the adhesive.
Place the carpet straight down onto the adhesive tape. When you come across obstacles or different angles hard to manoeuvre, fold the carpet back from the wall and press the sheet to fit the base of the obstacle. Make one cut running from just above the floor level upward toward the edge of the carpet.
Draw the blade through the carpet from the base of the obstacle or angle toward the edge, making triangle shapes. This helps you work around the curves. The carpet should now follow the angles or obstacle's curves. Cut away any excess carpet pieces and push down to fit as closely as possible.
Choose your carpet carefully as some can cause bad carpet burns even on your hands while working with it.
Always wear protective gloves.