There are four basic types of insulation: Rigid foam, batts and rolls, cellulose, and polyurethane (or “foam-in-place”). They are used for different applications and areas of the home. Some help control moisture in my crawlspace, some will help with sound-proofing my home, and some will last longer than others. No matter which one you choose, make sure you have a professional do the installation. Insulation DIY thought: don’t do it.