Knowing how to hang a door is a rite of passage for DIY enthusiasts. It is crucial if you want the door to be plumb, close quietly, and provide the privacy you need. Even if it takes you all afternoon, it is worth going slow to get it right the first time.
We break down the best techniques for hanging exterior and interior doors, along with professional tips to help you get the best results.
Key Takeaways
- Gather your gear: You need a spirit level, drill, tape measure, and plenty of wood shims.
- Measure the gap: Check the door opening and shim space; aim for a 1/8-inch gap for standard doors.
- Hinges first: Attach hinges to the door slab before lining them up with the frame.
- Test the swing: Ensure the door moves freely and latches correctly before walking away.
How Hard Is It to Hang Doors?
Hanging an interior door might look intimidating, but it is a manageable project. With a bit of patience, even a beginner can pull it off. It might take a full day to get your first one right, but you can work on speed once you master the technique.
The secret to success is working methodically. Don’t rush the measurements, and continually check that the door is level.
How to Hang a Door Yourself
Hanging interior and exterior doors is a skill that saves you money and solves drafty room issues. Before you start swinging hammers, you need the right setup.
What You’ll Need
- Spirit level (2-foot and 4-foot).
- Assorted drill bits.
- Drill/Driver.
- Speed square.
- Hammer or mallet.
- Circular saw or handsaw.
- Tape measure.
- Utility knife.
- 3-inch wood screws.
- Pry bar.
- Wood shims.
- Pencil.
- Low-expansion foam.
Option 1: In a New Frame (Rough Opening)
1. Shim the Hinge Side First
A shim is a thin, tapered piece of wood used to adjust the door frame until it is perfectly square. Most standard rough openings allow for about half an inch of shimming on either side.
Measure the width of the rough opening to see how much shim space you have. Mark the hinge locations on the drywall, then place shims at the top and bottom hinge locations.
Most internal doors have hinges set seven inches from the top and eleven inches from the bottom.
Next, add center shims. Use your long spirit level to ensure these shims create a perfectly plumb line. It is easier to shim the hinge side of the rough opening before inserting the jamb. When you fit the frame, you simply nail the hinge side to these pre-set shims.
2. Check Floor Clearance
Your door needs to clear rugs, carpets, and uneven floors. If you are installing over a subfloor, account for the thickness of the future flooring.
You generally need at least half an inch of space between the bottom of the door slab and the floor covering to ensure smooth operation.
3. Set the Jamb Height
Use 1/2-inch thick scraps of wood to rest under the side jambs. This raises the frame off the rough opening and prevents moisture wicking or awkward trimming later.
4. Check the Wall Plumb
Place your spirit level against the drywall to check if the wall itself is vertical. If it is leaning, you might need to adjust how the jamb sits. If the framing is slightly off, use a heavy hammer and a scrap block of wood to nudge the studs.
Recheck with the level. Do this on both sides of the door opening.
5. Fit the Frame
Screw the hinge-side jamb to the door stud first. Drive screws through the frame directly into the shims you placed earlier. Ensure the frame is still balanced on your spacing blocks to maintain ground clearance.
6. Shim the Latch Side
Now move to the latch side. Insert shims at the top, middle, and bottom. You want the gap between the jambs to be consistent from top to bottom. Drive two finish nails into each shim location to secure the frame.
Use a utility knife to score and snap off the excess shim wood so it sits flush with the drywall.
7. Level the Head Jamb
Lay a level across the top head jamb. If it isn’t level, shim the low side until the bubble is centered. This ensures your door creates a nice, even reveal (gap) at the top when closed.
8. Cut the Hinge Mortise
If your jambs aren’t pre-mortised, you need to cut slots for the hinges. Trace the hinge plate onto the jamb. Use a utility knife to score the edges, then use a sharp chisel to remove the wood to the depth of the hinge plate.
Drill pilot holes to prevent splitting the wood, then screw the hinges into the jamb.
Move to the door slab. Hold the door in the frame using wedges to lift it to the correct height. Mark the hinge locations on the door to match the frame. Remove the door, cut the mortises on the door slab, and attach the hinge leaves.
9. Hang and Test
Lift the door into place and interlock the hinge knuckles. Drop the pins in. Check that the door swings freely and doesn’t ghost (swing open or closed on its own).
10. Attach Hardware
Use a template to drill holes for the lockset if the door isn’t pre-bored. A kit like the DEWALT Door Lock Installation Kit makes this foolproof.
Insert the latch mechanism, secure the handles, and install the strike plate on the jamb. Test the latch to ensure it clicks shut without forcing it.
Option 2: In an Existing Frame (Slab Replacement)
Fitting a slab door into an existing frame is easier because the rough work is already done. You don’t need to mess with the frame or shims; you just need to match the new door to the old one.
1. Measure the Old Door
Don’t measure the opening; measure the old door you just took off. Copy down the precise height and width. Most exterior doors are 80 inches tall and 36 inches wide, but older homes vary wildly.
2. Check the Frame for Square
Use a speed square to check the top corners of the existing frame. If the frame is racked (out of square), you will need to trim the new door to match the angle, or it won’t close.
3. Trim the New Door
Your new door should be about 1/8 inch smaller than the opening on the top and sides. If you bought a stock door, you might need to trim it. Use a circular saw with a straight-edge guide to cut it to size.
4. Transfer Hinge Locations
Lay the old door on top of the new door (clamp them together if possible). This is the pro trick. Use a square to transfer the exact hinge locations from the old door to the new one. This ensures perfectly aligned hinges without measuring tapes.
Top Tip
When transferring marks, ensure the top of both doors are perfectly flush. Any variance here will cause the door to hit the jamb.
5. Cut Mortises and Drill
Trace your hinge plates at the marked locations. Score with a knife and chisel out the waste wood. Pre-drill your screw holes to ensure the wood doesn’t split, especially on hollow-core doors which have solid wood only on the edges.
6. Hang the Door
Lift the door into the opening. Screw the hinges into the existing spots on the frame. If the old screw holes are stripped, fill them with wood glue and toothpicks (or a dowel) before driving in new screws.
7. Install Lockset
Mark the handle location using the old door as a guide. Drill your holes, install the latch, and screw on the faceplates.
Option 3: Hanging a Pre-Hung Door
Pre-hung doors come mounted in their own frame with hinges already attached. This is the most common route for renovations because it saves time and eliminates alignment headaches.
1. Check the Floor Level
Place a long level across the floor where the door will sit. If the floor isn’t level, the side of the door frame on the “high” side of the floor needs to be trimmed. If you don’t do this, the top of the door frame will be crooked.
2. Position the Unit
Remove any shipping plugs or transport screws holding the door closed. Place the entire unit into the rough opening. Center it so there is equal spacing on the left and right.
3. Shim and Secure the Hinge Side
Focus on the hinge side first. Plumb the hinge-side jamb with a 4-foot level. Place shims behind each hinge location to fill the gap between the jamb and the stud.
Screw through the jamb, through the shims, and into the stud. For heavy solid-core or exterior doors, replace one short screw in the top hinge with a 3-inch screw that goes all the way into the framing for support.
4. Adjust the Reveal
Close the door. Look at the gap (reveal) between the door slab and the frame at the top and latch side. It should be an even 1/8 inch all around.
Shim the latch side jamb to adjust this gap. If the gap is tight at the top, shim the bottom of the latch jamb out. Once the gap is even, nail or screw the latch jamb in place.
Top Tip
Remove the door slab from the frame during installation to make the unit lighter, then reattach it once the hinge-side jamb is secured.
5. Final Touches
Score and snap the shims. Fill the gap between the jamb and the wall with low-expansion foam to insulate and lock the frame in place. Install your casing (trim) to hide the gap.
6. Hardware Installation
Since the holes are pre-bored, simply slide the latch in, attach the handles, and install the strike plate. Check that the bolt extends fully into the strike plate hole.
Tips for Hanging Doors Like a Pro
Taking a DIY approach is cost-effective, but you want professional results. Here are three rules carpenters live by.
Measure Twice, Cut Once
The margin for error is tiny, usually about 1/8 inch. If you cut too much off, you can’t put it back. Verify your measurements before your saw touches the wood.
Watch the “Cross-Leg”
If the wall isn’t perfectly flat, the two side jambs might not be parallel (known as “cross-legged”). This causes the door to hit the stop at the top but not the bottom (or vice versa). You may need to adjust your jambs slightly out of flush with the drywall to get the door to close flat against the stop.
Security Upgrades
For exterior doors, use 3-inch screws in the hinges and strike plate. This anchors the door into the structural studs, not just the thin door frame. It makes kicking the door in significantly harder.
What to Do When the Door Doesn’t Close?
If your door binds or bounces back, don’t panic.
- Loose Hinges: Tighten the screws. If they spin, fill the hole with a glued dowel and re-drive the screw.
- Door Sag: If the top latch-side corner hits the frame, drive a long 3-inch screw into the top hinge (into the wall stud) to pull the door back up.
- Swelling: In humid months, wood expands. You may need to plane a slight amount of wood off the rubbing edge.
FAQs
How Much Does a Pro Charge to Hang a Door?
Costs vary by location and complexity. A simple interior hollow-core door might cost $100 to $150 for labor, while a heavy exterior entry door can range from $300 to over $800 depending on the frame condition.
Is Replacing Interior Doors Worth the Cost?
Yes, especially if the current doors are damaged hollow-core slabs. Upgrading to solid-core doors improves soundproofing significantly and adds a premium feel to the home. It is a high-impact, relatively low-cost upgrade.
Do You Put Hinges on the Door or Frame First?
It is generally easier to attach the hinges to the door slab first. This allows you to lay the door flat and ensure the hinges are flush in their mortises before trying to wrestle the door into the vertical frame.
How Many Shims Do I Need?
You should place shims at every hinge location (top, middle, bottom) and corresponding spots on the latch side. You will likely use 12 to 16 individual shim wedges per door to get a snug fit.
Should I Use Nails or Screws for Installation?
Finish nails look cleaner and are fine for lightweight interior doors. However, for exterior doors or solid-core interior doors, always use screws behind the weatherstripping or hinges to handle the extra weight.
Can I Cut a Door to Fit an Odd Opening?
Absolutely. Most older homes have settled, meaning frames aren’t square. You can trim a wood door with a circular saw or planer. Just be careful with hollow-core doors; you can usually only trim about one inch off the bottom before you hit hollow space.
What Is the Correct Gap Around a Door?
Aim for a uniform gap of 1/8 inch (about the thickness of two nickels) on the top and sides. For the bottom, you typically want 1/2 inch to 3/4 inch depending on your flooring type.
What Is the Standard Door Size?
The standard US interior door size is 80 inches tall by 30, 32, or 36 inches wide. Exterior doors are typically 36 inches wide. Always measure the slab, not the frame, when buying a replacement.
Do More With a Door
Now you have the definitive guide on how to hang a door properly. The next time you notice a door that won’t latch or lets a draft in, don’t ignore it. Grab your level and shims and fix it for good.
The first door might take you all afternoon, but by the time you finish, you will be operating like a pro carpenter.
