ATAS Field-Lok User 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 field­seaming 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.

Eave Detail

Gable Detail

1. Apply ATA-Shield** along eave and up the roof
to a point at least 24” beyond outside face
of exterior wall.

2. Install 3/8” shim at eave.

3. Install drip edge against fascia trim.

Lay ATA-Guard*over eave trim.

4. Trim (cut) both seams back to allow for turn down.

Install panel by sliding lower flanged edge
over drip edge.

5. See below for proper panel sidelap installation.

General Note: Before any installation be sure to lay
ATA-Shield**in all areas where ice & water can occur.

ATA-Guard or appropriate underlayment should be
installed over the entire roof.

1. Install underlayment to gable edge.

Place 3/8” shim as shown.

2. At gable start detail, install gable trim starter cleat
with appropriate fasteners at 2’-0” into fascia board.

3. At end gable, cut panel to appropriate width to

allow room for clips at gable end. If panel cut off is

3” or wider install cut off portion of panel
underneath last panel w/ butyl tape applied in
between the two panels and install clips before
installing gable assembly.

4. Apply double-faced butyl sealant as circled in
sketch. Fasten “Z” closure to panel with pop-rivets.

5. Install starter cleat at end detail same

as start detail.

6. At both ends snap gable/rake trim over starter
cleat and “Z” closure to-Lok into place. Pop-rivet
these two pieces together with one pop-rivet
per trim length.

Underlayments: ATA-Shield** is the recommended self adhesive
underlayment for eaves, sidewall and any critical areas exposed to ice
damming and extensive water run off.
Available in 65’-8” x 39-3/8” rolls (200 sq. ft. per roll).

Underlayments: ATA-Guard* is a polyolefin based, 100%
asphalt free, high strength reinforced roofing
underlayment for use beneath metal roofing on steep
slope applications. 1000 sq. ft. per roll at 48” wide.

PANEL SIDELAP