Internal tilt latches are concealed inside the upper corners of a tilt-window sash. Only the thumb buttons or actuators may be visible from the top, while the latch noses extend into the jamb to hold the sash securely upright.

Before You Start

Tools and materials you may need:

• Phillips and flat-head screwdrivers
• Small pick or non-marring trim tool
• Digital caliper, ruler, or tape measure
• Replacement internal tilt latch or matching latch set
• Small container for screws and retainers
• Phone or camera for reference photos
• Clean cloth or soft brush
• Safety glasses and work gloves
• A padded work surface
• A second person for a large or heavy sash

Safety Warning: Keep control of the sash whenever the tilt latches are released. A heavy sash can fall inward, twist, or disengage from the pivot lock shoes if it is not supported evenly.

Do not pry against the glass, glazing bead, or thin vinyl sash walls. Stop if the latch appears trapped behind a welded, sealed, or non-removable component.

Before beginning, inspect the top rail and upper corners of the sash.

An internal tilt latch typically has:

• A latch body concealed inside the sash
• A visible thumb button, slider, or recessed actuator
• A latch nose that projects from the side of the sash
• No complete latch housing sitting on top of the sash
• An access screw, end cap, slot, or internal channel near the corner

A surface-mounted latch sits completely on top of the sash with visible mounting screws. A slide-in latch may sit in an exposed top track rather than being fully concealed inside the sash.

Take clear photos before removing the sash or latch components.

Photograph:

• The top of the sash
• The left and right latch actuators
• The projecting latch noses
• Any screws, caps, slots, or retaining tabs
• The interior and exterior orientation of the sash
• Any visible numbers, logos, or markings
• The jamb areas where the latch noses engage

Handing matters: Label the original latches left and right as they are removed. Internal latches may look similar while using opposite nose directions, actuator locations, or retaining features.

1. Unlock the window completely.
2. Raise the lower sash approximately three to six inches above the sill.
3. Keep the sash level inside the jamb.
4. Clear furniture and other objects from the area in front of the window.

Raising the sash provides clearance for the bottom rail to pivot inward without striking the sill.

1. Retract both internal-latch actuators toward the center of the sash.
2. Confirm that both latch noses clear the jamb.
3. Pull the top rail inward evenly with both hands.
4. Lower the sash slowly into a supported position.

Do not pull one corner inward while the opposite latch remains engaged. Twisting the sash may damage the latch, frame, pivot bars, or glass.

Keep the sash supported throughout the repair. Do not use the tilted sash as a shelf or workbench.

Some internal latches can be accessed while the sash remains tilted. Others require the sash to be removed and placed on a padded surface.

When sash removal is necessary:

1. Tilt the sash inward to approximately 90 degrees.
2. Support both lower corners.
3. Raise one pivot bar slightly out of its pivot lock shoe.
4. Move the sash sideways only as much as required to release the opposite pivot bar.
5. Lift the sash away and place it flat on a padded work surface.

Removal methods vary. Stop if the pivot bars do not release easily or if the sash begins to twist.

Examine the upper corner of the sash and determine how the original latch is retained.

Common access methods include:

• A screw through the side or top of the sash
• A removable corner cap or end stop
• A latch that slides out through the end of an internal channel
• A retaining tab accessed through a small opening
• A removable actuator or thumb button

Do not remove glazing bead, glass-retaining components, or welded sash sections unless the window design specifically requires it and you are prepared for that level of disassembly.

1. Hold the latch actuator so it cannot fall into the sash cavity.
2. Remove the retaining screw, cap, clip, or tab.
3. Slide or withdraw the latch in the same direction as the original installation.
4. Keep the spring, actuator, screw, and any spacers together.
5. Repeat the process on the opposite side when replacing a pair.

If the latch does not move, inspect for an additional screw, molded stop, internal hook, or paint and debris around the access opening.

Do not pull hard enough to crack the sash wall or break the actuator inside the cavity.

Internal latches must match the sash cavity and actuator opening as well as the jamb engagement point.

Measure and record:

• Overall latch-body length
• Body width and thickness
• Latch-nose length, thickness, and shape
• Distance from the body end to the actuator opening
• Thumb-button or slider dimensions
• Location of retaining screws, tabs, hooks, or slots
• Spring position and style
• Left- or right-hand orientation
• Any molded numbers, letters, or manufacturer markings

Photograph the front, back, side, nose, actuator, and retaining features before ordering.

Do not order by overall length alone: Two internal latches may share the same length while using different body profiles, nose offsets, actuator positions, or sash-retaining features.

Place the old and new latches beside each other before installation.

Confirm that the replacement has:

• Matching body length, width, and thickness
• The correct left- or right-hand orientation
• A matching latch-nose shape and projection
• The actuator in the same position
• The same spring and return action
• Matching retaining tabs, screws, hooks, and slots
• Enough clearance to slide into the sash cavity
• A nose that reaches the original jamb-engagement point

Replacing both sides may be helpful when the latches are sold as a matching set or when the opposite latch shows similar wear.

Remove loose debris, broken plastic, and dirt from the latch opening with a soft brush or clean cloth.

Inspect for:

• Cracks around the actuator opening
• Damaged or enlarged screw holes
• Broken pieces trapped inside the sash
• Bent or missing springs
• Deformed internal channels
• Damage where the latch nose exits the sash
• Paint or debris preventing free movement

1. Orient the replacement the same way as the original.
2. Insert the latch body into the sash channel or corner opening.
3. Align the actuator with the opening in the top rail.
4. Engage the original retaining tab, hook, cap, or screw.
5. Tighten screws only until the latch is secure.
6. Operate the actuator several times before reinstalling the sash.

The latch nose should retract completely and return outward under spring tension without sticking.

Do not overtighten: Excessive force may crack the plastic latch, distort the sash wall, strip the mounting point, or restrict actuator movement.

1. Hold the sash level with both hands.
2. Insert the first pivot bar into its pivot lock shoe.
3. Align the opposite pivot bar with the other shoe.
4. Confirm that both shoes are positioned at the same height.
5. Lower the sash carefully until both pivot bars are fully seated.
6. Rotate the sash upward toward the jamb.

Stop if the sash twists, one pivot bar will not seat, or the pivot lock shoes move to different heights.

1. Return the sash to the upright position.
2. Confirm that both latch noses extend into the jamb.
3. Pull inward gently on each upper corner to verify engagement.
4. Retract both actuators and tilt the sash inward again.
5. Return it upright and confirm that both latches reset.
6. Raise and lower the sash through its full normal range.
7. Close and lock the window.

The repair is complete when:

• Both actuators move freely
• Both latch noses retract completely
• The noses return outward under spring tension
• The sash remains securely upright
• The sash tilts only when both sides are released
• The window closes and locks normally

The Latch Will Not Slide into the Sash

• Compare the body width and thickness with the original.
• Check for debris or broken plastic inside the channel.
• Confirm that the latch is oriented correctly.
• Look for a tab or rib that does not match the sash profile.

The Actuator Binds

• Confirm that the actuator is centered in its opening.
• Loosen an overtightened retaining screw slightly.
• Check whether the spring is installed correctly.
• Inspect the sash opening for rough or damaged edges.

The Nose Does Not Reach the Jamb

• Compare the nose length and offset with the original.
• Confirm the correct left- or right-hand latch was installed.
• Check whether the sash is centered inside the jamb.
• Inspect for sash or frame misalignment.

The Window Will Not Lock

• Confirm that both latch noses are fully engaged.
• Check that both pivot bars are seated correctly.
• Close both sashes completely.
• Inspect the meeting rails, lock, and keeper for misalignment.

• Confusing an internal latch with a surface-mounted design
• Ordering by overall length alone
• Failing to label the left and right latches
• Pulling the sash inward before both sides release
• Allowing the sash to fall or twist
• Removing glazing components unnecessarily
• Forcing the latch out of the sash channel
• Losing the original spring, actuator, or retaining hardware
• Installing a latch with the wrong nose offset
• Overtightening retaining screws
• Failing to test the actuator before reinstalling the sash
• Lowering the sash before both latch noses engage
• Discarding the originals before testing the replacements

Replacing an internal tilt latch begins with identifying how the latch is concealed and retained inside the sash.

Document the original orientation, remove the sash only when necessary, and compare the complete latch body, actuator position, nose profile, spring, handing, and retaining features before installation.

Afterward, confirm that both latches retract, return, engage the jamb, and hold the sash securely upright.