Plaston Mechanical Fastening System
Plaston Mechanical Fastening System is a method of attaching the Plaston approved Insulation Board to exterior wall surfaces using an appropriate fastener for the substrate type and a plastic washer.
Characteristics
Mechanical fasteners can bond the insulation board to any substrate of any kind like metal, wood, masonry, or concrete especially when the substrate is not suitable for adhesive attachment and the surface preparation for adhesive attachment is costly.
- Plastic washers do not corrode and are poor conductors of heat.
- Fasteners can be installed at any temperatures.
- When mechanical fasteners are used, the base coat can be applied immediately.
Surface Preparation
- The surface of the substrate must be flat within 1/4 in 10 ft length.
- For concrete and unit masonry, grind down high spots and level significant voids with Plaston level or material.
- For stud and sheathing, make sure that the sheathing is adequately attached to the studs.
- Attach Plaston Detail Mesh at the location of all termination points of the Plaston EIF System to allow for back wrapping.
Procedure
Mechanical fasteners are installed using the drill and screw method. There are two versions of that method.
Method I: The one step process uses self-drilling screws and works well when going into screwable sheathing and studs. First, the fastener is inserted into the washer and the screw/washer assembly is fitted onto the screw gun. The screw gun is then used to drill the hole and draw down the fastener in one step.
Method II: This is a two step process where separate drilling and screw tightening devices are used. This method is used on masonry, concrete and other hard substrates. First, a drill is used to bore a hole through the insulation board and into the substrate. The screw/washer assembly is then inserted into the hole and tightened with a tool.
Recommendations
- The outside face of the fastener head should be flush with the outside face of the insulation board; a depth stop device is recommended to be used.
- The fastener must go into a structural material. Thus, a layout is needed because the fasteners should line up with the studs while also being in the right location with respect to the edge of the insulation board. A typical pattern is shown in the following figure.
- With the PM Systems, install approximately half of the total required of fasteners to secure the insulation. Use the balance of the fasteners to secure the reinforcing mesh.
- For further details on fasteners layout, refer to Plaston’s respective system specifications and details.
Information contained in this product data sheet conforms to the standard detail.Recommendations and specifications for the installation of PLASTON Products and is presented in good faith.
PLASTON assumes no liability, Expressed or implied as to the architecture, engineering, or workmanship of any project.
