Control joints refer to one-piece accessories designed to create artificial planes of weakness where minor stresses can dissipate without forming cracks. Their placement is a function of the designer and should be located on the drawings. Control joints should be wire tied to the lath.
They are a function of the plaster assembly, not the structure. For this reason AMICO can only recommend the traditional point of view that control joints are to be wire-tied to the lath and not fastened to the structure. By wire-tying down one side of the joint and then tying the other side, the lath can be brought taut creating a preferred substrate for the application of the finish.
Comes with removable tape. 10’ standard length.
M-Type Control Joint
| Product No. | Flange Dimensions | Ground | Box Count | Part # |
|---|---|---|---|---|
| AMCJM-380 | 4" Overall | 3⁄8" | 35 | VSCJM40038010 |
| AMCJM-500 | 4" Overall | 1⁄2" | 35 | VSCJM40050010 |
| AMCJM-580 | 4" Overall | 5⁄8" | 30 | VSCJM40058010 |
| AMCJM-750 | 4" Overall | 3⁄4" | 25 | VSCJM40075010 |
| AMCJM-780 | 4" Overall | 7⁄8" | 20 | VSCJM40078010 |
Vinyl M-Type Control Joint Deep
With removable tape. An improved version of the “M” type control joint. This Control Joint provides returns to better lock into the stucco. These joints can be ordered without the removable tape.10’ standard length.
Vinyl Control Joint M Deep
| Product No. | Ground | Flange Height | Box Count | Part # |
|---|---|---|---|---|
| AMCJX-250 | 1⁄4" | 21⁄2" | 50 | VSCJ25025010 |
MOIST CURING
Moist curing is the means to hydrate the brown coat prior to the finish coat. Its purpose is to assure sufficient water remains in the plaster to effect hydration that develops strength, enhancing the strain capacity of the finish. Moist curing helps mitigate many of the ills that can lead to cracks.
All aspects of lathing and plastering go far beyond the application of plaster to a wall or soffit. It is a craft that requires skill, artistry, experience, and good judgment to install the finish that performs for the life of the structure.
One must understand that Codes and Standards are only a minimum requirement. A successful installation goes far beyond the brief comments, though AMICO feels these guidelines experienced through time can offer the best opportunity for a successful installation.
NOTE: Removable tape has been provided to insure a clean joint after stucco application. All joints should be embedded in sealant and sealed after installation if necessary. If the joints are ordered without the removable tape, it will be the contractor’s responsibility to keep the joint clean of wet stucco and any other debris.