How to Install Double Entry Doors: Step-by-Step Guide

Double entry doors enhance a home’s curb appeal and provide a grand welcoming entrance. Proper installation ensures security, energy efficiency, and smooth operation. This guide outlines every phase, drawing from proven methods used by professionals.

Why Choose Double Entry Doors?

These doors offer aesthetic appeal with practical benefits like better light entry and spacious access. They require precise alignment to prevent drafts and wear. Common materials include fiberglass, steel, and wood, each with unique maintenance needs.

Essential Tools and Materials

Gather these before starting to avoid delays:

• Level (48-72 inches), tape measure, hammer, screw gun
• Wood shims (multiple packs), 2.5-inch wood screws
• Caulking gun with silicone or latex caulk, flashing tape
• Drill with bits, utility knife, safety gear (glasses, gloves)
• Insulation foam, exterior paint, hardware (hinges, locks, handles)
• Sill pan materials, weatherstripping, astragal (door seal)

For double doors, prioritize adjustable hinges and deadbolts for security.

Preparing the Installation Area

Clear the doorway of debris, old hardware, and uneven flooring. Scrape away old caulk or mortar for a clean rough opening. Measure the existing opening: width should match door specs plus 1/2 to 1 inch for shims; height allows for sill clearance.

Check for plumb walls using a level. If the opening exceeds specs by more than 1 inch, add framing lumber nailed securely. Verify square by measuring diagonals—they must be equal.

Removing the Old Door Unit

Start by propping the doors open. Unscrew hinges from the frame, working top to bottom. Remove locksets and strike plates. Pull the frame out carefully, cutting nails if needed. Inspect the rough opening for rot or damage; repair with treated lumber.

Clean the sill area and apply subfloor adhesive if reinstalling over existing flooring. This step prevents future shifts.

Setting Up the Rough Opening

Install a sill pan for water diversion: line the bottom with flashing tape, fold up sides, and seal corners. Add a bead of caulk around the perimeter. Dry-fit the new frame to confirm fit without forcing.

Positioning the Door Frame

Apply caulk beads to the subfloor and frame exterior. Tilt the frame into the opening from outside, centering it. Insert setting screws loosely through the hinge jamb into the threshold. Use shims at hinge locations to plumb the frame.

Place the header jamb with pegs aligning into side jambs. Check level across the top and plumb on sides. Secure temporarily with one screw per jamb.

Installing the Door Slabs

Identify active (locking) and inactive slabs. Hang the inactive door first: align hinges, shim behind each, and secure with full-thread screws. Repeat for active door, ensuring even margins (1/8 inch).

Test swing: doors should meet evenly at the astragal without binding. Adjust shims as needed for square operation.

Aligning and Shimming for Precision

Shim behind every hinge and latch side. Open doors to verify plumb; drive 2.5-inch screws through hinges into framing. Check reveals: top and sides uniform, bottom slightly higher for drainage.

Avoid over-shimming to prevent bowing. Use a straightedge across doors when closed for flatness.

Installing Hardware and Astragal

Mount handlesets, deadbolts, and surface bolts per manufacturer templates. For double doors, adjustable strike plates on the astragal ensure bolt engagement.

Install weatherstripping: compression type on frame, vertical separation at meeting edges. Lubricate hinges lightly for smooth action.

Weatherproofing and Insulation

Fill shim spaces with low-expansion foam. Apply flashing tape over exterior joints. Caulk all gaps with exterior-grade sealant, tooling smooth.

Insulate the header if needed. Paint or stain brickmold to match siding before final attachment.

Final Checks and Adjustments

Operate doors 10-20 times: check alignment, lock function, and sweep. Adjust astragal up/down for tight seal. Verify no light gaps when closed.

For security, use longer screws in latch jamb into studs. Test against wind pressure.

Common Mistakes to Avoid

• Ignoring rough opening prep, leading to misalignment.
• Skipping shims, causing sagging over time.
• Improper caulking, allowing water intrusion.
• Rushing hardware install without testing bolts.

Maintenance Tips Post-Installation

Annually inspect seals, lubricate locks, and repaint as needed. Tighten screws if doors sag. This extends lifespan to 20+ years.

Frequently Asked Questions

Can I install double entry doors alone?

Two people recommended for heavy units; solo possible with clamps and props.

How do I fix uneven door margins?

Adjust shims and screws; plane edges if needed after 24 hours.

What if my rough opening is too small?

Trim brickmold or reframe carefully; consult pro if over 1/4 inch off.

Are permits required?

Check local codes, especially for exterior changes.

How to choose door material?

Fiberglass for low maintenance, steel for security, wood for custom look.