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How to Correctly Install a Double D Roof Anchor

Looking to safely secure yourself while working on a roof? The Double D Anchor is one of the most reliable fall protection solutions out there—and it’s easy to install when done right. In this guide, we’ll walk you through how to properly install a Double D Roof Anchor for maximum safety and code compliance.

✅ TL;DR: To correctly install a Double D Anchor, find a structural rafter, remove a section of shingles, use the right lag bolts, and install under the ridge cap. Always follow OSHA safety standards.

🔗 Permanent Roof Peak Anchor

🔗 Safety Kit in a Bucket

🛡️ What Is a Double D Roof Anchor?

A Double D anchor is a permanent or temporary fall arrest anchor that installs over the roof ridge, creating two D-rings—one for each side of the roof. This allows for maximum mobility and fall protection coverage on both slopes.

🧠 Why it’s popular:

  • Works with composition or wood shake roofs

  • Dual-sided tie-off points

  • Meets ANSI & OSHA standards when installed correctly

  • Great for steep-pitch roof work

🧰 Tools and Materials You’ll Need

  • Double D Anchor

  • 12 wood screws or 3" lag bolts (as specified by the manufacturer)

  • Cordless drill or impact driver

  • Stud finder or hammer to locate rafters

  • Roofing nails

  • Roofing sealant or caulk

  • Safety gear: harness, lanyard, gloves, safety glasses

🔧 Step-by-Step Installation InstructionsStep 1: Choose the Anchor Location

  • Locate a roof ridge with solid rafters on both sides.

  • Use a stud finder or tap the roof to identify the framing.

  • Avoid areas with venting, skylights, or ridge caps with cutouts.

Step 2: Remove Shingles at the Ridge

  • Pull back or remove 2–3 shingles on each side of the ridge to expose the decking.

  • This ensures the anchor sits flush and fasteners go directly into the wood structure.

🛠️ Pro Tip: Use a flat bar to lift shingles without tearing them.

Step 3: Pre-Drill and Secure the Anchor

  • Align the Double D anchor over the ridge so that both legs sit flat on the decking.

  • Pre-drill holes using the anchor’s template or guide holes.

  • Drive in lag bolts or wood screws (depending on spec) into each hole.

    • Usually 6 per side for a total of 12 fasteners.

Step 4: Seal and Reinstall Shingles

  • Apply roofing sealant over the screw heads.

  • Replace or cut shingles to fit over the anchor base.

  • Use roofing nails to tack shingles back down.

  • Optionally install a ridge cap over the anchor if using a permanent installation.

Step 5: Clip In Your Safety Harness

  • Attach your lanyard or lifeline to either D-ring.

  • Perform a tug test to make sure the anchor is secure.

  • Proceed with your roofing work—safely.

🛑 Safety Tips and Compliance

  • Always follow OSHA 1926.502 standards for fall protection.

  • Use anchors rated for 5,000 lbs or more.

  • Never share a single anchor point unless rated for multiple users.

  • Replace your anchor if it has experienced a fall or impact event.

📄 [Read Our Guide: OSHA Requirements for Roof Fall Protection]

🧲 Permanent vs Temporary Installation

Installation TypeProsConsPermanentIdeal for future work or multi-phase jobsMay require flashing or cap customizationTemporaryQuick setup, reusableNeeds to be removed and patched post-job

🏷️ Featured Products for Installation

📈 Why Installing It Right Matters

Improper anchor installation is one of the leading causes of preventable falls in residential roofing. A correct install:

  • Prevents accidents

  • Passes inspections

  • Gives you and your crew confidence on every job

Need help finding the right anchor or fall protection gear?

Contact us or explore our Fall Protection Collection.