Using glue to put your carpet down is a great long-term option, particularly for wall-to-wall carpeting. Certain carpeting has its own adhesive backing while others need you to apply glue between the carpet and subfloor. When applying glue, you would normally spread the glue out using a trowel or a similar tool. Most recently, we have seen an increase in the popularity of eco-friendly carpet adhesives, which normally come with a synthetic or acrylic rubber base.