초록 ▼

An expansion/control joint, used to separate stucco or plaster material into sub-portions during application of the stucco or plaster material to a wall, and to relieve stress and limit or control cracking in a stucco or plaster wall or surface caused by stucco or plaster shrinkage and thermal movem

An expansion/control joint, used to separate stucco or plaster material into sub-portions during application of the stucco or plaster material to a wall, and to relieve stress and limit or control cracking in a stucco or plaster wall or surface caused by stucco or plaster shrinkage and thermal movement in the stucco or plaster wall or surface, includes an expansion/contraction member comprising two flexible panels extending between second sides of first and second stucco stop walls, the two panels comprising an upper panel and a lower panel, the panels forming in conjunction with the second sides of the first and second stucco stop walls a flexible hollow tube which extends along and between the second sides of the first and second stucco stop walls and which flexes to accommodate expansion and contraction of the stucco or plaster material responsive to weather induced movement of the stucco or plaster material.

대표청구항 ▼

1. An expansion/control joint used to separate stucco or plaster material during application of the stucco or plaster material to a wall into sub-portions, and to relieve stress and limit or control cracking in a stucco or plaster wall or surface caused by stucco or plaster shrinkage and thermal mov

1. An expansion/control joint used to separate stucco or plaster material during application of the stucco or plaster material to a wall into sub-portions, and to relieve stress and limit or control cracking in a stucco or plaster wall or surface caused by stucco or plaster shrinkage and thermal movement in the stucco or plaster wall or surface, comprising a first base panel having a front face,a first stucco stop wall formed on the first base panel and extending outwardly above the front face of the first base panel, the first stucco stop wall having a first side and a second side, the first side of the first stucco stop wall having an engaging surface for engaging plaster or stucco material,a second base panel having a front face,a second stucco stop wall formed on the second base panel and extending outwardly above the front face of the second base panel, the second stucco stop wall having a first side and a second side, the first side of the second stucco stop wall having an engaging surface for engaging plaster or stucco material,an expansion/contraction member extending between the second side of the first stucco stop wall of the first base panel and the second side of the second stucco stop wall of the second base panel for relieving stress and controlling cracks in stucco or plaster surfaces,the expansion/contraction member being flexible to permit movement of the expansion/contraction member responsive to weather induced movement of the stucco or plaster material,the expansion/contraction member comprising two flexible panels extending between the second sides of the first and second stucco stop walls, the two panels comprising an upper panel and a lower panel, the panels forming in conjunction with the second sides of the first and second stucco stop walls a flexible hollow tube extending along and between the second sides of the first and second stucco stop walls which flexes to accommodate expansion and contraction of the stucco or plaster material,a caulk receiving area formed between the second sides of the first and second stucco stop walls and above the upper panel of the expansion/contraction member for receiving caulk,the upper panel of the expansion/contraction member having an upper end portion having an outer surface, andbond-breaking tape mounted on the outer surface of the upper end portion of the upper panel of the expansion/contraction memberthe first stucco stop wall having an upper end portion and a flange formed in its upper end portion to assist in containing stucco or plaster material, the flange extending laterally away from the first stucco stop wall and over the first base panel, and the flange of the first stucco stop wall having an upper outer surface,the second stucco stop wall having an upper end portion and a flange formed in its upper end portion to assist in containing stucco or plaster material, the flange extending laterally away from the second stucco stop wall and over the second base panel, and the flange of the second stucco stop wall having an upper outer surface, and further including a strip of removable tape applied to the upper outer surface of the flange of the first stucco stop wall and to the upper outer surface of the flange of the second stucco stop wall and extending over the channel between the first and second stucco stop walls such that the removable tape covers the channel between the first and second stucco stop walls to prevent dirt, stucco, plaster, and the like from entering the channel during installation of the stucco or plaster material. 2. The expansion/contraction joint of claim 1, the upper panel of the expansion/contraction member being bowed. 3. The expansion/control joint of claim 1, the lower panel of the expansion/contraction member being bowed. 4. The expansion/control joint of claim 1, the upper and lower panels of the expansion/contraction member being bowed. 5. The expansion/control joint of claim 1, the first base panel having perforations formed therein. 6. The expansion/control joint of claim 1, the second base panel having perforations therein. 7. The expansion/control joint of claim 1, the first stucco stop wall having an upper end portion, andthe first stucco stop wall having a flange formed in its upper end portion to assist in containing stucco or plaster material,the flange having a first portion that extends laterally away from the first stucco stop wall and over the first base panel and a second portion extending from the first portion downwardly toward the first base panel. 8. The expansion/control joint of claim 1, the second stucco stop wall having an upper end portion, andthe second stucco stop wall having a flange formed in its upper end portion to assist in containing stucco or plaster material,the flange having a first portion that extends laterally away from the second stucco stop wall and over the second base panel and a second portion extending from the first portion downwardly toward the second base panel. 9. A method of relieving stress and limiting or controlling cracking in a stucco or plaster wall or surface caused by stucco or plaster shrinkage and thermal movement in the stucco or plaster wall or surface, comprising the steps of providing the expansion/control joint of claim 1,mounting the expansion/control joint on a backing wall,applying stucco or plaster material to the backing wall over the first and second base panels of the expansion/control joint, and up against the engaging surfaces of the first surfaces of the first and second stucco stop walls of the expansion/control joint,keeping the stucco or plaster material separated into sub-portions on the stucco or plaster wall or surface by being divided into sub-portions on the stucco or plaster wall or surface by the expansion/control joint,sealing against leaks by applying caulk to and extending between the second sides of the first and second stucco stop walls over the upper panel of the expansion/contraction member to form a seal between the second sides of the first and second stucco stop walls, andthe expansion/contraction member of the expansion control joint flexing to accommodate expansion and contraction of the stucco or plaster material.