Exterior Door Installation Guide

Hurricane-Ready: A Guide to Florida Exterior Door Installation

Installing an exterior door in Florida is not a typical DIY weekend project. Because of strict Florida Building Codes (FBC) designed to withstand high winds and hurricane-force debris, specialized installation methods are required to ensure your home is safe and waterproof.
Whether you are a seasoned DIYer or hiring a professional, here is the essential, step-by-step guide to installing exterior doors according to Florida standards.

1. Preparation & Florida Code Requirements

Before you begin, ensure your door is approved for your specific Florida region. Coastal areas often have higher design pressure (DP) requirements, meaning you must use impact-resistant doors and specific anchoring hardware.
  • Check the Rough Opening: The opening should be 1/2” wider and 3/4” taller than the outside jamb dimension of the door unit.
  • Remove Old Door: Remove existing casing, door, and frame.
  • Inspect and Clean: Clean all debris from the subfloor and check that the sill is level.

2. Step-by-Step Installation Guide

This video provides a visual guide on how to install a hurricane-rated door:


Step 1: Install a Sill Pan (Crucial)

Water infiltration is the biggest threat. Never install a door without a proper sill pan to manage water drainage.
  • Apply a sealant like silicone to the subfloor.
  • Place the pan, ensuring it drains toward the outside.

Step 2: Apply Sealant

Apply a generous bead of high-quality sealant on the floor, over the back leg of the sill pan, and on the exterior jamb legs to ensure a airtight seal.

Step 3: Set and Shim the Door

  • Place the bottom of the pre-hung door into the opening first, then tilt the top into place.
  • Place shims behind each hinge and at every fastening point on the latch side.
  • Use a level to ensure the door is perfectly plumb, level, and square.

Step 4: Secure the Door Frame

  • Hinge Side: Drive 3-inch or longer screws through the hinge jamb, through the shims, and into the house framing to ensure it can withstand strong wind pressure.
  • Latch Side: Secure the lockset jamb, checking to ensure the gap between the door and frame (reveal) remains even.

Step 5: Install Florida-Approved Anchors

In high-velocity wind zones, concrete anchors (like Tapcons) must be placed at specific intervals (usually within 3-4 inches from the bottom and 8-10 inches apart along the frame).
  • Use specialized fasteners designed for wood bucks or direct-to-masonry, depending on your home's construction.

Step 6: Seal the Interior

Once the door is secured, fill the gap between the door frame and the wall stud with low-expansion spray foam insulation. Do not use high-expansion foam, as it can bow the frame.

Step 7: Final Finishing

  • Install your lockset and deadbolt according to the manufacturer’s instructions.
  • Apply exterior-grade sealant to the exterior casing/brick mold and siding.
  • Apply a bead of silicone under the threshold, particularly to keep water from creeping under the floor.