Magnesia is widely used primarily as wallboard alternative to conventional gypsum-based drywall and plywoods. The drywall plaster is a thick paste. Cork, plywood, hardboard, drywall, and foam insulation are common alternatives to Homasote. Gypsum rock is processed into drywall and plaster products at several Fort Dodge manufacturing facilities. Sledgehammers are often used in destruction work, for breaking through drywall or masonry walls. It must be concealed behind drywall, sheet metal, or concrete. In a similar application, some spackling used to repair holes in drywall contains phenolphthalein. All the internal walls were made of light metal framework holding up thick drywall panels. When driven fully home, drywall screws countersink their heads slightly into the drywall. Pieces of construction that are deemed "inseparable" parts, such as concrete or drywall, qualify. The installation is an architectural space, constructed from drywall panels. Dan is a loving, easygoing drywall contractor. It is used to make the joints between sheets of drywall materials. This is commonly used in drywall construction in the United States and elsewhere. Blueboard also has square edges rather than the tapered-edge drywall boards.