A well-installed entry door comes down to the opening, not the door. The frame has to sit plumb, level and square, the bottom of the opening has to be flashed so water stays out, and the slab has to clear the jamb by an even, small gap all the way around. Get those right and the door seals, locks and swings for years. Get them wrong and no price tag on the door will save you from drafts, sticking and rot. At Revive Exteriors (Michigan Lic. #262500123, revivemihome.com), entry doors are one of the exterior products we install for Northern Michigan homeowners, and this guide walks through what a proper installation involves.

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TL;DR

  • Installation quality depends on the rough opening: it must be plumb, level and square before the door goes in, and the sill area must be flashed.
  • A prehung door is the whole unit (slab, frame and hinges) set into the opening. It is leveled and shimmed so the gap around the slab stays even, with a 1/8 inch to 3/16 inch margin at the corners for one major manufacturer.
  • Entry door prices swing widely: prehung steel starts under $150 for the door alone, while fully optioned fiberglass can reach $5,000 to $10,000, before labor.
  • Custom doors add a measuring and verification step, because handing, prep and reveal have to match before anything is cut or fitted.
  • Revive Exteriors installs custom entry doors across Traverse City, Petoskey, Gaylord, Cadillac, Alpena and the surrounding area, with dedicated project management.

Table of Contents

What entry door installation actually includes

People often picture swapping a door like swapping a lamp. In reality an exterior door is a small system: the slab you see, the frame it hangs in, the threshold, weatherstripping, hardware, flashing and the framing behind it all. Fine Homebuilding explains that exterior units are more complex than interior doors because they must be made weathertight, and that most of the prep work goes into leveling and weatherproofing the bottom of the opening, where water is most likely to enter and damage flooring, subflooring and framing.

A complete installation covers these jobs:

  1. Measuring the existing opening and confirming the new door fits it.
  2. Removing the old door, frame and trim without damaging the siding and flashing around it.
  3. Checking and correcting the rough opening (the bare framed hole in the wall).
  4. Flashing the sill and setting the new unit.
  5. Shimming, fastening and insulating the gap around the frame.
  6. Adjusting the door, installing hardware and sealing the exterior.

Two terms are worth knowing. A prehung door arrives with the slab already hung on hinges in its own frame. A slab is just the door panel, with no frame. Most replacements of a worn-out door in a worn-out frame use a prehung unit. A slab-only swap works only when the existing frame is perfectly sound.

Step 1: Measure the opening and choose the door

The measuring step is where most problems begin. Pease Doors, a door manufacturer, notes that slab replacements fail most often at the measurement and verification step, and recommends confirming that the new slab matches the old one, including handing and factory prep, before anything comes off the frame.

What to measure and what to expect:

  • Standard size. This Old House reports that a standard single door is 36 inches wide by 80 inches high, though width can run from 30 to 36 inches and height from 80 to 96 inches.
  • Rough opening. The prehung unit should be a little smaller than the rough opening to leave room for shims and insulation. This Old House puts it at 2 inches narrower and 1 1/2 inches shorter. Fine Homebuilding gives a rule of thumb that the opening is generally about 2 inches wider than the door, or 1/2 inch to 1 inch taller and wider than the framed unit. Manufacturers differ, so the instructions for your specific door govern. ThermaTru, for example, suggests an opening of the frame height plus 1/2 inch and frame width plus 1/2 inch to 3/4 inch in its pre-hung fiberglass door instructions.
  • Wall thickness. Measure it, because the jamb has to match the wall depth.
  • Swing direction. Fine Homebuilding notes that inswing doors are far more common in the United States, partly because you can still open one when there are several feet of snow outside. In Northern Michigan, that is a practical point, not a trivia item. The same article says outswing doors seal better and suit coastal areas.
  • Handing. Stand outside and note which side the hinges are on and which way the door swings. Ordering the wrong hand is an expensive mistake on a custom door.

We handle the measuring and ordering on the projects we take, so the door that arrives is the door that fits.

Revive Exteriors, 1650 Barlow Street, 49686 Traverse City
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Step 2: Check that the opening is plumb, level and square

Before the door goes in, the opening has to be true. Pease Doors’ prehung installation guide lists four checks: diagonal measurements should match within 1/8 inch, the sill should be level across its full width, the jack studs (the vertical framing on each side) should be plumb in both directions, and the header (the horizontal framing across the top) should be level.

Four rough-opening checks and string test

ThermaTru recommends a 6-foot level for plumb checks, a solid and level subfloor, and a framing square at each corner. Its instructions also describe a string test: run a string diagonally across the opening from outside. It should just touch in the center, and if it does not, the opening is out of plumb by twice that gap and needs correcting.

Why it matters: Taylor Door’s installation guide says problems in the rough opening get transferred to the door unit and cause adjustment and operating difficulties. A door set into a crooked opening will rub, bind or leave a gap that no weatherstripping can close.

Step 3: Remove the old door carefully

Removal is slower than demolition. Today’s Homeowner describes the sequence: pry off the interior molding and casing, take the door off its hinges, unscrew the jamb screws, cut through caulk, then brace the unit and work it free with a pry bar.

The parts that go wrong:

  • Prying too hard against siding and trim, which damages material that is staying.
  • Disturbing the flashing that runs up behind the siding at the top of the door.
  • Letting the opening sit exposed. In a Michigan fall or winter, the new door should be ready to go in the same day.

That last point is why planning matters. When the old door comes out, the new one should already be on site and verified. As a contractor handling exterior work on roofs, siding, windows and doors, we coordinate the sequence under one dedicated project manager so the house is never left open longer than it needs to be.

Step 4: Flash the sill and set the unit

Water enters at the bottom. Fine Homebuilding stresses leveling and weatherproofing the sill area before the door goes in. Typical products are flashing tape or a pan flashing under the threshold, plus sealant where the threshold meets the subfloor. A solid, flat subfloor is non-negotiable: ProVia’s installation guide calls a flat subfloor critical.

Then the unit is set:

  1. Dry fit the door in the opening to confirm it sits properly.
  2. Apply sealant and flashing at the sill.
  3. Set the unit from outside, pressing it into place and checking it against level.
  4. Fasten the hinge side first through shims, checking plumb as you go.
  5. Shim the lock side to hold an even gap.

ProVia’s guide calls for a 1/8 inch to 3/16 inch margin at all corners of the active door slab, and says to watch the plane of the door throughout, because adjustments after the install is complete may mean removing and reinstalling the door. Pease Doors suggests about 1/4 inch to 3/8 inch of shim space between each jamb and the jack studs.

Step 5: Shim, fasten and insulate

Shims go behind the hinges and the strike plate, and at points between, so the frame can’t bow when you screw through it. The tools and materials list from This Old House gives a sense of the job: caulk gun, drill/driver, hammer drill, level, pry bar, shims, screws, low-expansion foam insulation, a 3/16-inch masonry bit, ladder and Z-flashing, among others.

Two details separate a draft-free door from a leaky one:

  • Low-expansion foam only. Standard foam can swell and bow a jamb. Low-expansion foam fills the gap between frame and framing without pushing the frame out of square.
  • Test the swing before sealing. MMI Door says to check for a 3/8 inch to 1/2 inch space between the door and the jamb stop at top, middle and bottom, then open and close the door to confirm it swings smoothly.

Michigan winters make this stage matter more. A door that is 1/8 inch out at the top will let in cold air and moisture long before it fails visibly. Energy efficiency is one of our core focuses, and a tight, properly insulated door installation is a direct part of that.

Step 6: Weatherstripping, sweep, hardware and final adjustment

Fine Homebuilding’s Patrick McCombe makes a point that surprises people: good weatherstripping is what makes a door perform. It also has to match the door’s edge profile: square-cornered doors take medium-reach weatherstripping, while eased-edge doors take long-reach.

For the final fit, Pease Doors gives the industry target reveal: a consistent 1/8 inch gap at the top and both sides, and roughly 1/2 inch clearance at the bottom before the sweep goes on, so the sweep seals against the threshold without binding.

Signature Door’s instructions add checks worth running on any door:

  • Test all hardware (locksets, flush bolts) for smooth operation.
  • Confirm the slab does not drift toward or away from the jamb on its own.
  • Adjust the threshold so no air moves under the door, while leaving room for the sweep.

If the latch doesn’t engage cleanly after the final adjustment, the cause is usually alignment between the bolt and the strike plate. This guide on fixing a door that won’t lock explains the common causes of a lock that fails to engage.

Last, caulk the exterior joint between the frame and the siding or trim, and finish the door if it is unfinished. Wood and many fiberglass doors need paint or stain on all edges to protect them.

What custom entry doors change

A custom door works through the same steps, but three things get more attention.

Verification before cutting. Custom slabs can include factory prep for the lockset, hinges and glass. Confirm hand, bore and backset before the door is drilled or trimmed.

Reveal and sweep. Because custom slabs may be thicker, wider or heavier, the 1/8 inch reveal and 1/2 inch bottom clearance above become the measure of a good install.

Sidelights and transoms. These glass panels beside or above the door add weight and extra flashing points, and they make squareness of the opening even more important.

Custom entry doors are what many Northern Michigan homeowners choose when curb appeal is the goal. The door is the focal point of the front elevation, and a door chosen to suit the siding and trim changes how the whole house reads from the street. If you are updating more than the door, our siding work and replacement windows are planned to go together with it.

How much entry door installation costs

The door itself is the widest variable. According to Fine Homebuilding (2019 figures, so expect higher prices today):

Door type Reported price range (door only)
Prehung steel Under $150
Prehung steel with sidelights and transom $2,000 to $3,000
Basic prehung fiberglass A few hundred dollars
Fully optioned fiberglass $5,000 to $10,000

Installation labor is on top of that and depends on:

  • The condition of the opening. Rot in the sill or framing adds repair work.
  • Door style. Sidelights, transoms and double doors take longer and need more flashing.
  • Trim and siding. Replacing or patching exterior trim and siding around the door adds scope.
  • Hardware and finish. Smart locks, multipoint locks and factory finishes change the total.

Revive Exteriors does not publish a fixed price for entry doors because the opening and door choice drive the number. We offer complimentary inspections and project quotes with transparent pricing, so you see the full scope before you sign.

DIY or professional installation?

The steps above show what a careful installation takes: a 6-foot level, a framing square, flashing, shims, low-expansion foam, a hammer drill, and a door that can weigh well over 100 pounds to lift into an opening on a ladder-height threshold. The unforgiving part is that the work is hidden. A sill that was not flashed correctly will look fine for a season and then rot the subfloor.

A professional installation makes sense when:

  • The door is custom, with sidelights, a transom or a double door.
  • The opening is out of square or the sill shows soft spots.
  • The door is in a high-exposure spot, like a north-facing entry that takes drifting snow.
  • You want the door to match new siding, windows or trim installed at the same time.

In those cases, hiring an installer who handles the whole sequence is the straightforward route.

Our approach to entry doors

Most entry door problems we hear about are not door problems. They are opening problems: a sill that was never flashed, a frame shimmed out of plumb, a gap that was foamed too hard. A door only performs the way the manufacturer says it will when the opening under it is right.

That is why we install manufacturer-certified products and put one dedicated project manager on the job. Northern Michigan homes face deep cold, heavy snow and wind-driven moisture, and the front door takes all of it. We want that door to look good from the street and keep the heat in for the long run.

When we quote an entry door, we price the whole job transparently: the door, the install and any repair to the opening, so there are no surprises midway.

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Get an entry door installed in Northern Michigan

Revive Exteriors installs custom entry doors for homeowners in Traverse City, Petoskey, Gaylord, Cadillac, Alpena and nearby communities. We are locally owned, hold an A+ rating from the BBB, and work under Michigan Lic. #262500123. Complimentary inspections and quotes are standard, and one project manager keeps the job on track from the first visit to the final adjustment.

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See our entry door installation page, visit revivemihome.com, or call (866) 466-3351 to schedule your complimentary inspection.

FAQ

How long does entry door installation take?

A straightforward prehung replacement in a sound opening is typically a single-visit job. Custom doors with sidelights or a transom, or openings that need framing or sill repair, take longer. Your quote will spell out the scope for your specific door.

Can I replace just the door slab and keep my frame?

Only if the frame is square, plumb, free of rot and the right size for the new slab. Slab replacements fail most often at measuring and verification, so handing, prep and reveal all need confirming first. If the frame has any damage or has shifted, a prehung unit is the better choice.

Should my new entry door swing in or out?

Most U.S. homes use inswing doors, which still open when snow is piled outside, a real benefit in Northern Michigan. Outswing doors seal well but are less common. The best choice depends on your entry layout and how it is sheltered.

What size is a standard entry door?

The standard single door is 36 inches wide by 80 inches high. Widths from 30 to 36 inches and heights from 80 to 96 inches are also made. Custom doors can be sized to fit unusual openings.

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Revive Exteriors | (866) 466-3351 | revivemihome.com | Michigan Lic. #262500123