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Install rigid foam insulation between the studs in new construction by cutting each piece to fit using a box cutter, table saw or circular saw. Press it into the cavity so that friction holds it in place. Use expanding foam or caulking to seal around the edges. Foam ins...


The three main types of foam rigid insulation boards are expanded polystyrene, extruded polystyrene and polyisocyanurate. Another type is rigid fiber insulation board made from fiberglass or mineral wool, which contractors often use to insulate air ducts or in situation...


The most popular materials for manufacturing rigid foam insulation panels are polyisocyanurate, extruded polystyrene and expanded polystyrene. Regardless of the material used in their construction, rigid foam insulation panels have several advantages over traditional ba...


Expanded and extruded polystyrene are two types of roof insulation. Other types are blown-in fiberglass or cellulose. Proper use depends on budget, ease of installation, available space and resistance to moisture.


Install rigid foam insulation on top of the sheathing and top with metal roofing panels for new construction. Butt the edges of the foam together and use screws to hold it in place, sealing all seams with duct tape to protect the edges from moisture damage. Insulate exi...


The thickness of R-30 insulation varies, depending on the type of insulation used. Fiberglass panels and rolls with an R-30 insulation value have a typical thickness of eight to nine and a half inches.


Oil, fur, silk, wool, rubber, glass, plastic, wood, paper, wax and ebonite are good insulators. Insulators are substances with tightly bound outer electrons and heavily resist the flow of electrons. Most nonmetals are classified as insulators.