Defect in drywall application where the joint tape or the shadow of the joint tape shows through the wallboard. High humidity which delays the drying of the second and third coats, dry tape having absorbed too much moisture from the joint compound and excess joint compound left under the joint tape are some of the causes of this condition. Also called tape photographing, this condition can be corrected by sanding the compound covering the tape, feathering it out into the drywall surface, and then covering it with thin coats of joint compound.
Joint reinforcement
(1) Steel reinforcement placed in a horizontal mortar joint. (2) Steel wire shapes that are used to reinforce masonry unit joints. (3) Extra weld metal, which is added to increase the strength of the joint.
Joint runner
Steel clamp, which fits around a pipe to keep molten lead from escaping as it is poured through a special opening in the clamp, while making a horizontal lead and oakum pipe joint. When the lead flows into the oakum packed joint, it hardens to make a seal so that the joint runner can be removed when the lead cools. Lead and oakum joints are often used with hub and spigot drainage pipe.
Joint striking tool
Tool that is used to shape and smooth mortar joints before the mortar is set.
Joint tape
Special paper or paper-faced cotton tape used over joints between wallboard to conceal the joint and provide a smooth surface for painting.
Joint tenancy
A form of co-ownership giving each tenant equal interest and equal rights in the property, including the right of survivorship.
Joint venture
An agreement between two or more parties to invest in a specific single business or property. Although not a continuing relationship, it is treated as a partnership for income tax purposes.
Jointed flooring
Strip flooring, generally Birch, Beech & Hard Maple or Pecan, manufactured with Square Edges and no tongue or groove, usually end-matched. Used principally for factory floors where the square edges make replacement of strips easier.
Jointer
(1) Hand tool, also called a groover, which is used to form an indentation or groove, in wet concrete. (2) Power tool which smoothes wood for precise joints with rotating cutter blades.
Jointer clamp
The jointer clamp is an attachment for table saws that straightens crooked board edges and aids in straight-line rips without the need of an expensive jointer.
