ATAS Field-Lok - Manual

Installation Guide
Review and understand complete
guide before beginning installation.
This guide has been prepared as
suggested details to particular design
conditions. Each condition has certain limitations to
performance, aethetics or economics. Professionals
qualified to assess this information for a specific project,
should determine that the selection and installation are
made to their requirements. ATAS cannot assume any
responsibility for the actual selection and/or installation of
materials. The panels, flashings and trim shown in this
guide are illustrated over solid and plumb substrate. It is
assumed that the structure has been designed and
prepared in accordance with local building codes.
NOTE : This guide to be used for installations with a
roof slope of 2:12 or greater only on a solid
substrate. Consult factory for all other installations.
Field-Lok Panel has extra strength, extra height - field seamed
panel. Installed with concealed clips and fasteners and a
mechanical seamer in a tri-fold lock-in application. Panels are
available in smooth or embossed texture in 30 standard ATAS
colors are available with premium KYNAR 500
® or HYLAR 5000 ®
finish. Stiffening ribs are optional.
13 3/4” (FLS137) and 18” (FLS180) wide
FLS Panel
FLS180
FLS137
ATAS Field-Lok seam roof panels are typically designed for
low slope roofing with slopes of 3:12 and below. ATAS FLL
and FLM series are commonly used on slopes of 1.5/12 to
3:12 while our FLN and FLS series are commonly used on
slopes of .5/12 through 3:12. At slopes below 2:12 the use of
either factory or field applied sealant within the panel
interlock is recommended.
Field-Lok panels require the contractor to rent a field-
seaming machine designed for the specific panel profile and
gauge. These machines field form the panel-to-panel
connection and clip-to-panel connection. These on site seam
forming machines are relatively heavy. Extreme care should
be taken when using these machines in steep slope
applications. In addition, the primary design consideration
with mechanically seamed panels is functional
waterproofing. Often the mechanical seaming in the field can
cause clip read through or telegraphing and can be seen
visually when used in steep slope roofing applications. This
read through of the clip is considered to be aesthetic only
and not a structural defect of the panels and therefore not a
cause for rejection of the materials. Some slight surface
abrasion may be evident on the finish of the panels after
field seaming of the panels.