Metal Sales DECRA User Manual

Installation Guide

DECRA Shingle

STARTER CLIP W/DRIP EDGE

Installation Guidelines

■ General Instructions

Failure to use these guidelines may void the pr oduct
warranty. Local building codes may require additional
application techniques beyond these instructions. In such
cases, the local codes must be followed.
Note:

Do not use lead or copper with this steel roofing system.

■ Roof Slope

Install on roof slopes of at least 3:12. Slopes less than 3:12
are considered decorative and must be applied over a roof
system complying with local codes.

■ Deck Preparation

New Construction:

decking. Acceptable substrates include exterior grade
plywood (min.
American Plywood Association and/or7/16”oriented
strandboard or chipboard. Fire retardant plywood is NOT an
approved decking substrate.

Reroof:

shingles or applied over existing spaced sheathing provided
the space between the boards is filled as necessary to provide
a base for fastening.

When installing over existing asphalt shingles, cut-back the
existing roofing material approximately 8” along the Eave
and Rake/Gable Edges. In situations where code allows re­roofing over 2 layers of asphalt shingles, follow the local
code.

Panels may be installed over existing asphalt

Panels are to be installed over solid

3

/8”) conforming to specifications of the

■ Fasteners

Screws:

screws not smaller than a #8 hex head. Make sure they are
long enough to penetrate the deck by a minimum of 1/2”.
Recommended length is 1-1/2” long.

Use a minimum of at least 4 corrosion resistant

■ Underlayment

Standard underlayment should consist of one layer of Type 15 or one
layer of Type 30 felt. It is required, that a layer of underlayment be used
before applying the DECRA Shingle.

In areas subject to ice build-up, a self-adhering modified bitumen sheet
shall be used in lieu of a standard underlayment around the perimeter of
the roof and any other areas prone to ice build-up or as code requires.
This protection should extend from the roof edge to a point at least 36”
inside the exterior wall line of the building.

■ Starter/Eave

Use the Starter Clip w/Drip Edge that includes a preformed drip edge.
Fasteners should be spaced 6" on center.

NOTE: S trike a straight line to assur e Starter Clip w/Drip Edge is
straight.

STARTER CLIP W/DRIP EDGE

➀➂➃ ➁

Fastening Position
that locks tabs joint

Cover
Width

19-3/4”

Wat er

Channel

Front Lock

28” Half Shingle Cut line

Fastener

Detail

DO NOT USE DRY WA LL SCREW S.

■ High Wind

In areas prone to hurricanes and high winds (in excess of
100 mph 3 second gust), installation must meet local
standards and codes. A minimum of four #12 screws must
be used in the field of the roof. Panels around the perimeter
at rakes, directly along the hips and gables, on the top two
courses and bottom two courses should be fastened with
eight #12 screws at eight evenly spaced locations. Also,
these panels around the perimeter should have a DECRA
Shingle High Wind Channel over the back Clip-Lock.

Cover Length 49”

Approximate fastening positions

Clip-Lock

Clip-Lock and Fastening Position

End
Tab

Overlap
Edge

In the event that the Short Course Clip is used in place of the Starter Clip w/
Drip Edge, a bead of polyurethane sealant is required between the Short
Course Clip and the existing drip edge. The bead should be of adequate size
to alleviate any water penetration between the two materials.

■ Rake/Gable Channel

Standard metal drip edge should be installed along all rake/gable edges.
Position and fasten the Rake/Gable Channel directly to the drip edge
allowing it to extend 3/4” beyond the fascia. Screws should be spaced 6”.
Where the Shingles fit into the Rake /Gable Channel, proper drainage will
be attained by removing 2” from the front and back Clip-Locks on each
panel. The Rake/Gable Channel provides a finished channel/cover for the
panels at the roof’s edge.