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INSTALLATION GUIDE

Mailboxes & Posts · Accessories

Version 2.0 · May 2026

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Mailboxes & Posts Post-mounted

Mailbox and 6x6 In Ground Post

Installation walkthrough

Mailbox and 6x6 In Ground Post

What's included

  • Mailbox Post
  • Modern Mailbox
Mailbox and 6x6 In Ground Post

What you'll need

  • Post Hole Diggers or Shovel
  • Phillips head screwdriver
  • Level
  • Quick Setting Concrete (approx. ½ of 60 lb. bag) — use protective gear please
  • Access to water (approx. 2 gal.)
Mailbox and 6x6 In Ground Post · Mailboxes & Posts

Installing the In-ground Post

  1. 1Watch our "Preparing Your Post for Installation" video.
  2. 2Time to dig! Check for utility lines first. You need a hole about 12" in diameter and 16" deep for the 6x6 post. Note the "front" directional sticker on the post and orient accordingly.
  3. 3Add ½ a bag of quick setting concrete to a few inches below top of hole.
  4. 4Add water! You want it to hold the post but still be moveable — like a concrete smoothie. (Stir a bit.)
  5. 5Check final orientation height, and for level in both directions.
  6. 6Cap off the hole with extra dirt, packing down as you go. Check level as you tamp.
  7. 7Check level one last time and let concrete cure for an hour or so. Wash off any concrete residue.
Mailbox and 6x6 In Ground Post · Mailboxes & Posts

Installing Modern Mailbox

  1. 1Remove the four bolts inserted into the mounting plate. Use only the 4 in the middle of the plate (3-3/4"x7" pattern).
  2. 2The mounting plate is centered on the mailbox. You can shift it rearward to push the mailbox about 5" forward for a more overhung look.
  3. 3Set the mailbox on the post and use these 4 bolts to attach. TIP: Partially start all 4 bolts before tightening. Do not overtighten.
Mailbox and 6x6 In Ground Post

Mounting reference

Post mounting diagram

Standard post placement: 6-8" from curb edge · bottom of mailbox 41-45" above drive surface · 12" diameter hole 16" deep with concrete.

Mailboxes & Posts Surface mount

Mailbox and 6x6 Surface Mount Post

Installation walkthrough

Mailbox and 6x6 Surface Mount Post

What's included

  • Mailbox Post
  • Surface Mount Bracket
  • Modern Mailbox
Mailbox and 6x6 Surface Mount Post

What you'll need

  • Phillips head screwdriver
  • Level
  • 1/4" Concrete Anchor Bolts
Mailbox and 6x6 Surface Mount Post · Mailboxes & Posts

Installing the Surface Mount Post

  1. 1Plan placement: front of mailbox should be 6-8" from the edge of the curb.
  2. 2Remove the 4 bolts at the base of the post that attach to the surface mount bracket. Remove the bracket.
  3. 3Attach bracket to surface using ¼" concrete anchor bolts, keeping it level. Shims may be needed.
  4. 4Slide post over bracket. Secure with 4 bolts you removed in step 2.
Mailbox and 6x6 Surface Mount Post · Mailboxes & Posts

Installing Modern Mailbox

  1. 1Remove the four bolts inserted into the mounting plate (3-3/4"x7" pattern).
  2. 2Optionally shift the mounting plate rearward to push the mailbox about 5" forward for a more overhung mount.
  3. 3Set the mailbox on the post and use these 4 bolts to attach. TIP: Start all 4 bolts before tightening. Do not overtighten.
Mailbox and 6x6 Surface Mount Post

Mounting reference

Post mounting diagram

Standard post placement: 6-8" from curb edge · bottom of mailbox 41-45" above drive surface · 12" diameter hole 16" deep with concrete.

Mailboxes & Posts Monumental · In ground

Mailbox and In Ground Monumental Post

Installation walkthrough

Mailbox and In Ground Monumental Post

What's included

  • Monumental Post
  • Modern Mailbox
Mailbox and In Ground Monumental Post

What you'll need

  • Post Hole Diggers or Shovel
  • Phillips head screwdriver
  • Level
  • Quick Setting Concrete (approx. ½–¾ of 60 lb. bag)
  • Access to water
Mailbox and In Ground Monumental Post · Mailboxes & Posts

Installing the In-ground Post

  1. 1Watch our "Preparing Your Post for Installation" video.
  2. 2Plan placement: front of mailbox 6-8" from curb edge, bottom of mailbox 41-45" from the ground.
  3. 3Dig a hole about 12"x24" and 16" deep.
  4. 4Add quick setting concrete to a few inches below top of hole.
  5. 5Add water — like a concrete smoothie. Stir a bit.
  6. 6Check final orientation height and level in both directions.
  7. 7Cap off with extra dirt, packing as you go. Check level as you tamp.
  8. 8Check level one last time. Let concrete cure for an hour or so.
Mailbox and In Ground Monumental Post · Mailboxes & Posts

Installing Modern Mailbox

  1. 1Remove the four bolts inserted into the mounting plate.
  2. 2Set the mailbox on the post. Use the 4 bolts to attach. TIP: Start all 4 before tightening.
  3. 3Stand back and enjoy your new mailbox!
Mailbox and In Ground Monumental Post

Mounting reference

Post mounting diagram

Standard post placement: 6-8" from curb edge · bottom of mailbox 41-45" above drive surface · 12" diameter hole 16" deep with concrete.

Mailboxes & Posts Monumental · Surface mount

Mailbox and Surface Mount Monumental Post

Installation walkthrough

Mailbox and Surface Mount Monumental Post

What's included

  • Monumental Post
  • Surface Mount Bracket
  • Modern Mailbox
Mailbox and Surface Mount Monumental Post

What you'll need

  • Phillips head screwdriver
  • Level
  • 1/4" Concrete Anchor Bolts
Mailbox and Surface Mount Monumental Post · Mailboxes & Posts

Installing the Surface Mount Post

  1. 1Plan placement: front of mailbox 6-8" from curb edge.
  2. 2Remove the 4 bolts at the base of the post that attach to the surface mount bracket. Remove the bracket.
  3. 3Attach bracket using ¼" concrete anchor bolts, kept level. Shims may be needed.
  4. 4Slide post over bracket. Secure with the 4 bolts you removed.
Mailbox and Surface Mount Monumental Post · Mailboxes & Posts

Installing Modern Mailbox

  1. 1Remove the four bolts in the mounting plate.
  2. 2Set the mailbox on the post. Use the 4 bolts to attach. TIP: Start all 4 before tightening.
Mailbox and Surface Mount Monumental Post

Mounting reference

Post mounting diagram

Standard post placement: 6-8" from curb edge · bottom of mailbox 41-45" above drive surface · 12" diameter hole 16" deep with concrete.

Mailboxes & Posts Package drop

Waldo XL Package Drop System

Installation walkthrough

Waldo XL Package Drop System

What's included

  • Waldo XL Mailbox
  • Package Drop Base
Waldo XL Package Drop System

What you'll need

  • Existing mounting surface (concrete pad, sidewalk, etc.)
  • Anchoring hardware (anchor bolts, compression sleeves, etc.) — tools not provided
  • Short-handled Phillips head screwdriver
  • Level
Waldo XL Package Drop System · Mailboxes & Posts

Installing the Package Drop Base

  1. 1Remove products from packaging and verify there's no shipping damage.
  2. 2Installation requires an existing concrete pad or solid surface with proper anchoring. See the Mounting Diagram.
  3. 3Once the surface is prepped, anchor the package drop using the 4 holes in the bottom panel.
  4. 4Align package drop over anchors and secure via access through the rear locking door. Keep it centered and square.
Waldo XL Package Drop System · Mailboxes & Posts

Installing Modern Mailbox

  1. 1Remove the front 2 and rear 2 bolts holding the custom outer shell (don't remove the middle bolts).
  2. 2Set the mailbox on top of the package drop's top flange. Align the 4 holes and reinsert the bolts.
Waldo XL Package Drop System · Mailboxes & Posts

Tips for Use

  1. 1Two keys are included for the rear access door. This uses a standard mailbox lock — note the numeric code on the key. If lost, a new lock may need to be ordered.
  2. 2Two additional keys are included for the Waldo XL Locking Mailbox; these may not match the Package Drop lock keys.
  3. 3After install, you may need to note "leave in mailbox package drop" on orders for a while.
  4. 4The front opening is not weatherproof — avoid leaving packages in extreme or wet weather.
Waldo XL Package Drop System

Figure 1 — Mounting Diagram

Package drop mounting diagram

Recommended concrete pad: 17.25" × 26" (2" border around the package drop, 5" thickness). Mounting holes: ¼" diameter, 7" apart at top, 12" tall pattern.

Waldo XL Package Drop System

Figure 2 — Attaching the Mailbox

Attaching the mailbox to the package drop

Remove the front 2 and rear 2 bolts holding the outer shell. Align the 4 holes with the package drop mounting flange and reinsert the bolts.

Accessories Address

Stand Up Address Sign

Installation walkthrough

Stand Up Address Sign

What's included

  • Stand Up Address Sign
Stand Up Address Sign

What you'll need

  • Shovel
  • Level
  • Quick Setting Concrete (use protective gear please)
  • Access to water
Stand Up Address Sign · Accessories

Installing the Sign

  1. 1Dig a hole just larger than your sign base and 6-12" deep. Check for utility lines first.
  2. 2Add premixed quick setting concrete to a few inches below top of hole.
  3. 3Check that the sign is level.
  4. 4Cap off with extra dirt, packing as you go. Check level as you tamp.
  5. 5Check level one last time. Let concrete cure for an hour or so.
Accessories Address

Modern Address Numbers

Installation walkthrough

Modern Address Numbers

What's included

  • Aluminum house number(s)
  • Hardware (2 spacers and 2 threaded studs per number)
  • Paper mounting template
Modern Address Numbers

What you'll need

  • Masking tape
  • Level
  • Silicone caulk
  • Power drill
  • Rag/paper towels
Modern Address Numbers · Accessories

Setup

  1. 1Verify all items were included in box.
  2. 2Arrange mounting templates in horizontal or vertical pattern. Use template edges as suggested spacing.
  3. 3Place the template on the install surface, ensure level and proper height, tape in place.
  4. 4At each stud mark, drill 7/32" holes 1¾–2" deep. (¼" bits are also fine.)
Modern Address Numbers · Accessories

Mounting

  1. 1Carefully screw the threaded rods into the numbers (don't cross-thread). Slide spacers onto rods.
  2. 2With template still in place, test fit to ensure rods line up with the holes.
  3. 3Apply a small amount of silicone to each mounting hole — use the template as a mask.
  4. 4Slowly insert the numbers fully into place. Tweak for perfect alignment. Let silicone cure.
Accessories Accessory

Modern Stair Treads

Installation walkthrough

Modern Stair Treads

What's included

  • Modern Stair Tread(s)
  • Hardware (6 Screws per Tread)
Modern Stair Treads

What you'll need

  • Power drill
Modern Stair Treads · Accessories

Installation

  1. 1Verify all items were included in box.
  2. 2Determine placement of stair tread.
  3. 3Fasten to existing stair using 6 included screws.
  4. 4On solid wood stairs, pre-drill the 6 holes with a 1/16" bit before fastening.
Accessories Accessory · Lighting

12V LED Light Upgrade on New Mailbox

Installation walkthrough

12V LED Light Upgrade on New Mailbox

What's included

  • Set of wired LED panels — pre-installed on your mailbox
  • “Y” wire harness — pre-wired to the panels
  • In-line dimmer
  • Power supply — one of two options chosen at checkout: a 12V AC/DC converter, or a 120V AC power supply
12V LED Light Upgrade on New Mailbox

What you'll need

  • Wire connectors / wire nuts
  • A power connection at the mailbox for your converter / power supply
12V LED Light Upgrade on New Mailbox · Accessories

Connecting your LEDs

  1. 1Your LED panels are already mounted and wired to the “Y” harness inside the mailbox — no shell removal is needed.
  2. 2Route the wiring down to the base of the mailbox and into the post cavity — run it through a hole near the base and up through the top of the post (drill one if it isn't already there).
  3. 3Connect the in-line dimmer to the “Y” harness output so it sits between the LED panels and the power supply.
  4. 4Connect your power supply to the dimmer using wire nuts — either the 12V AC/DC converter or the 120V AC power supply, whichever you selected at checkout. (A timer can be wired in here if you're using one.)
  5. 5Set the mailbox on the post, tucking the wires into the post cavity, and secure with the four bolts.
  6. 6Restore power and test — the address numbers should illuminate. Use the dimmer to set your brightness.
Accessories Accessory · Lighting

12V LED Light Upgrade on Existing Mailbox

Installation walkthrough

12V LED Light Upgrade on Existing Mailbox

What's included

  • (2) 12-Volt LED panels in brackets
  • (4) self-tapping screws (2 per panel)
  • (1) “Y” wire harness
  • (1) in-line dimmer
  • Power supply — one of two options chosen at checkout: a 12V AC/DC converter, or a 120V AC power supply
12V LED Light Upgrade on Existing Mailbox

What you'll need

  • Power drill with Phillips head bit
  • A power connection at the mailbox for your converter / power supply
12V LED Light Upgrade on Existing Mailbox · Accessories

LED Panel Installation

  1. 1Remove the mailbox from the post by removing the four screws attaching the base to the post tabs. Set it on a soft surface to avoid scratching the finish.
  2. 2Run the hardwired line into your post through a hole near the base and up through the top (drill a hole through the post if one isn't present). Tape the wire off there while you work through the next steps.
  3. 3To attach the light panels to the inner kit, the outer shell must come off: unscrew the six bolts connecting the outer shell to the inner housing, then slide the shell off onto a soft surface. Be careful to avoid scratching the shell.
  4. 4When observing the LED panels, note that there is a LEFT and a RIGHT — the wire will be at the back of each panel.
  5. 5Align the middle hole on the LED panel bracket with the second rivet on the inner kit. Using the included self-tapping screws (two per side), attach the bracket to the inner kit with a drill. Repeat on the other side.
12V LED Light Upgrade on Existing Mailbox · Accessories

LED Panel Installation (cont.)

  1. 6Bring the wires from the LED panels together at the base of the mailbox and plug each panel wire into the “Y” harness. (You may need to remove the post plate for this step.)
  2. 7Carefully slide the outer shell back onto the mailbox and secure with the six screws you removed earlier.
  3. 8Connect the in-line dimmer to the “Y” harness output at the base of the mailbox — the dimmer sits between the LED panels and the power supply.
  4. 9Connect your power supply to the dimmer using wire nuts — either the 12V AC/DC converter or the 120V AC power supply, whichever you chose at checkout. (A timer can be wired in here if you're using one.)
  5. 10Set the mailbox on the post, tucking the wires into the post cavity as you do. Use the four bolts you removed to attach the mailbox. TIP: partially start all four bolts before tightening — and do not overtighten.
12V LED Light Upgrade on Existing Mailbox

Reference Images

Outer shell removed, LED panel brackets mounted to the inner kit
Outer shell removed — align each bracket's middle hole with the second rivet on the inner kit and screw it down; the panel wire sits at the back.
Rear/underside view showing panel wires gathered at the base
Bring both panel wires together at the base and plug them into the “Y” harness, then connect the dimmer and your power supply.

Still have questions?

We're here to help. Email us at hello@deusmodern.com.