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Installation Sequence Studio

Gravel Stop installation sequence

ANSI/SPRI/FM 4435/ES-1 edge system: 22 Gauge Cont Cleat, Strip-In Cover, 10' Lengths. 10" Face Max.

Drexel guide (PDF)

This sequence follows Drexel Metals' published installation guide for the system. The project's specifications, the approved shop drawings and the roofing membrane manufacturer's requirements govern; where they differ, follow them and ask AFS. Source: Drexel Metals, “Installation Guide For Gravel Stop”.

Step 1 of 5

Installing 22GA Galvanized Cleat

  1. Place the roof-side foot of the cleat squarely on the top edge of the treated wood nailing plate.
  2. Press the cleats firmly into position and nail through the pre-punched holes.
  3. At a miter, miter-cut the cleat into the corner as required to keep a continuous cleat line, then nail at a minimum 6" in each direction from the corner, or closer at special conditions.

As printed in the Drexel guide

“nail through the pre-punched holes with 1-1/4" S.S. Ring Shank Nails provided.”

Common mistakes this step guards against

  • Do not break the cleat line at a corner - miter-cut it so the line stays continuous.
Loading 3D view…
This step does not install the cover. Shown: the FlashDraft “Gravel Stop” section, the cover only - the cleat, splice plates and fasteners are in the parts list.

Parts, lettered as in the guide

  • AGravel Stop 10'-0" Std. Lengths
  • BSplice Plate 6" Lengths
  • C22GA Galvanized Continuous Cleat 10'-0" Lengths
  • DGravel Stop Miter (Outside Corner Shown)
  • E1-1/4" S.S. Ring Shank Nail at 12" o.c. (6" from ends) (Included & Required)
  • FPressure-Sensitive Cured Cover Strip (By Installer)
  • GApproved Roofing Membrane (By Installer)

Field checklist

Gravel Stop - from Drexel's guide. Tick each item as it is done; print this page for the crew.

Common mistakes

Each line is the reverse of an instruction the Drexel guide states.

  • Do not break the cleat line at a corner - miter-cut it so the line stays continuous. (step 1)
  • Do not butt lengths tight - leave the 1/4" gap for thermal expansion. (step 5)
  • Do not leave a joint without a splice plate. (step 5)
  • Do not cut lengths that leave short sections next to each other. (step 5)

Notes printed on the guide

  1. Isolate all metal parts from ACQ-treated wood, or any other galvanically incompatible material, with an appropriate membrane.
  2. Appliance attachments - lightning rods, signs, antennae - that penetrate the water seal, set up a galvanic reaction or otherwise compromise the roof edge system are to be eliminated or isolated, per section 8.0 of ANSI/SPRI ES-1. Isolate appliances from the edge system or do not attach them to it; the lightning protection manufacturer gives the attachment instructions.

Printed on the section detail

  • Face height 10" max. (Gravel Stop print approval DM-15476)
  • 1-1/4" S.S. Ring Shank 12" on center through pre-punched hole

Drexel published ratings

Sustained pressure as Drexel publishes it (Drexel Metals DM-19063 "ES-1_GT-1 Certification Program Product Line Card" 12.09.25). Design Engineer must apply the Factor of Safety.

CoverFace up toWall up toCleatSustained pressure
24 gauge10"-22 ga-140 psf
.040 AL10"-22 ga-130 psf