Use code accepted shear or corner bracing, such as 1"x 4"tie-in or steel strapping. Insulating sheathing should be placed with the longest edge in a vertical position with edges on stud centers. Stud wall spacing of 16"o.c.does not require horizontal support; however, 24" o.c.stud spacing should have a horizontal 2"x 4"at mid-height to support the sheathing. Nailing should be done with 3/8"diameter head galvanized roofing nails long enough to penetrate the wood stud at least 3/4". Sixteen gauge wire staples having a crown minimum of 3/4"wide and legs long enough to penetrate the framing at least 1/2"may also be used. Staple crowns should be parallel with the longest edge of the sheathing. Do not allow the nail head or staple crown to penetrate the sheathing surface. Fasteners should be placed no closer than 3/8"to the perimeter edges of sheathing, spaced 12"o.c.around the perimeters (including top plate and sole plate)and spaced 12"o.c.in the field of the board. When nailing siding materials over sheathing, care should be taken to avoid crushing the sheathing.

Special Notice

When building in areas of high humidity, and where building codes require it, a code-approved vapor retarder should be used. Typical vapor retarders used include kraft-faced foil insulation or poly sheathing of a specific thickness. Review your local building codes and model energy codes to determine the requirements in your area.

While sheathings are weather resistant, they are not designed for long term exterior exposure. Atlas recommends that they be covered with the permanent siding within 60 days of installation.