On a face-frame cabinet with full overlay doors, the hinge side of the equation barely changes: soft-close cup hinges use the same 35mm boring and overlay amount as standard hinges, so door reveal stays around 1/8 inch either way. The drawer side is where soft-close hardware matters most. Side-mount soft-close slides need roughly the same 1/2 inch of clearance per side as standard side-mount slides, but soft-close undermount slides require a much more exact drawer box width — often within about 1/16 inch of the manufacturer's spec — and frequently require the face frame's bottom rail to be notched so the slide mechanism can travel without binding. Always confirm the exact clearance formula for your specific slide model before cutting drawer box parts.
Face-Frame vs. Frameless Construction: Why Clearance Rules Differ
A face-frame cabinet has a solid wood frame — vertical stiles and horizontal rails — attached to the front edge of the plywood or particleboard box. A frameless (often called "full access" or European-style) cabinet skips that frame; the door or drawer front attaches directly to the edge of the box itself.
That difference matters for clearance because the face frame physically reduces the size of the opening compared to the interior box dimension. A frameless cabinet's opening is essentially the full width of the box interior. A face-frame cabinet's opening is narrower by the width of the stiles on each side, and often shorter by the width of the top and bottom rails.
Full overlay doors are designed to cover the face frame almost entirely, leaving only a small reveal gap between doors — visually similar to a frameless cabinet. But the drawer slides and hinge hardware still have to work around the physical frame member sitting behind the door and drawer front, which is the source of most of the clearance issues covered in this guide.
Full Overlay Doors on a Face Frame: Reveal and Stile Width
"Full overlay" describes how much of the face frame a door covers, not the hinge type. A full overlay door typically covers all but a thin sliver of the face frame stile beneath it, usually leaving a reveal of about 1/8 inch between adjacent doors and drawer fronts. Some shops tighten that to 1/16 inch for a more seamless look, while others use up to 3/16 inch for easier alignment and wood movement tolerance. This is a design and shop-tolerance choice, not a building code requirement.
The reveal only works if the face frame stile is wide enough to accept the overlay from both doors without the doors colliding or leaving the frame exposed. A simple planning formula:
Example: 1/2" overlay + 1/2" overlay + 1/8" reveal = 1 1/8" minimum stile width. Most cabinetmakers add extra margin and use a 1 1/4"–1 1/2" center stile so hinge adjustment and minor construction variance don't cause the doors to touch or gap unevenly.
The overlay amount itself is set by the hinge, not the frame — full overlay hinges are commonly stamped for around 1/2 inch of overlay, though this varies by hinge line and cup boring position. Always match the hinge overlay spec to your actual stile width rather than assuming a single universal number.
Drawer Box Clearance: Standard Slides vs. Soft-Close Slides
This is where face-frame drawer clearance gets more technical, because "soft-close" isn't one hardware format — it shows up on side-mount slides, undermount slides, and occasionally center-mount slides, and each has a different clearance relationship to the cabinet opening.
| Slide Type | Typical Clearance | Construction Tolerance | Face-Frame Impact |
|---|---|---|---|
| Standard side-mount (ball-bearing) | ≈1/2" per side (≈1" total) | Forgiving — small variance rarely causes binding | Slide body mounts to the box interior; face frame stile width just needs to clear the slide bracket |
| Soft-close side-mount | ≈1/2" per side (same envelope as standard) | Similar to standard side-mount | Soft-close mechanism is internal to the slide; no change to opening clearance needed |
| Standard undermount (rare, no soft-close) | Precise box width per manufacturer formula | Tighter than side-mount | Frame's bottom rail may need relief for the mounting bracket |
| Soft-close undermount | Precise box width, often within ~1/16" of spec | Tightest of the common options | Bottom rail frequently needs notching for full drawer travel |
In practical terms: if you are simply upgrading standard side-mount ball-bearing slides to soft-close side-mount slides, your existing drawer boxes will almost always still fit, because the two hardware types share the same physical footprint. Soft-close is added through an internal damper or spring cartridge, not a change in slide width.
Switching to a soft-close undermount slide is a different project. Undermount slides conceal the mechanism beneath the drawer box and require a drawer box built to a specific width for that slide model — there is no universal "1/2 inch per side" rule here. Cutting the box even 1/8 inch wide can cause the slide to bind or refuse to close; cutting it too narrow leaves the box loose and prone to rattling.
Why Face-Frame Cabinets Often Need Notching for Undermount Slides
Undermount slides run along brackets mounted near the back and bottom of the cabinet opening, and the drawer box travels forward and back directly over that bottom rail. On a frameless cabinet, there is no rail in the way — the box interior is open all the way to the front edge. On a face-frame cabinet, the bottom rail sits exactly where the slide bracket and drawer box bottom need to pass.
To resolve this, face-frame cabinet boxes built for undermount slides commonly have the bottom rail notched, routed, or relieved along the path of the slide so the mechanism and drawer box can travel without contacting the frame. Without this relief, the drawer may bind partway open, fail to close fully, or put uneven stress on the slide brackets.
- Confirm whether your cabinet boxes are face-frame or frameless before ordering undermount slides.
- Check the slide manufacturer's installation instructions for the required rail notch dimensions for your specific model.
- If you're retrofitting existing face-frame cabinets, verify there is enough rail material remaining to notch safely without weakening the frame joint.
- If notching isn't practical on an existing cabinet, consider staying with a soft-close side-mount slide instead, since it does not require altering the face frame.
Standard Hinges vs. Soft-Close Hinges: Does Clearance Actually Change?
For doors, the honest answer is: usually not much. A soft-close cup hinge and a standard cup hinge from the same hinge series typically share the identical 35mm cup boring diameter, boring depth, and mounting plate offset. The soft-close feature is usually delivered one of two ways:
- A hinge with an integrated hydraulic or silicone damper built into the arm — same boring pattern as the standard version.
- A standard hinge combined with a separate soft-close damper clipped onto the hinge arm or mounted inside the cabinet — this adds a small clip but does not change the door's overlay or reveal.
Because the overlay amount and cup boring stay the same, switching a face-frame cabinet from standard hinges to soft-close hinges of the same line generally does not require re-boring the door or changing the stile width calculation covered earlier. The one place this can go wrong is mixing hinge lines — a soft-close hinge from a different manufacturer or series may use a different overlay or cup diameter than your existing standard hinges, which would change your reveal and require re-drilling.
Step-by-Step: Measuring Your Face Frame Before Ordering Hardware
- Measure the face frame opening width for each cabinet — the distance between the inside edges of the left and right stiles, not the outside dimension of the box.
- Measure the center stile width separately if two doors will meet at the middle, and compare it against the overlay-plus-reveal formula covered above.
- Measure the depth of the cabinet box interior, not just the opening, since drawer slide length and drawer box depth depend on the full interior depth.
- Identify whether the drawer slides you plan to use are side-mount or undermount, and soft-close or standard — this determines which clearance formula applies.
- Pull the manufacturer's spec sheet or installation instructions for the exact slide or hinge model, since "typical" clearance numbers can vary between product lines.
- For undermount slides on a face-frame box, confirm whether the bottom rail requires notching, and measure the existing rail thickness to verify enough material remains after notching.
- Build a test drawer box at the calculated width before cutting a full set, and test-fit it in the actual opening with the slide hardware installed.
Face-Frame Clearance Quick-Reference Table
Use this as a planning reference. Because slide and hinge lines vary by manufacturer, always confirm exact figures against the specific product's cut sheet before cutting parts.
| Element | Common Planning Figure | Type of Guideline |
|---|---|---|
| Reveal between full overlay doors/drawer fronts | 1/16" – 3/16" (1/8" common) | Common industry practice / design preference |
| Minimum center stile for two full overlay doors | Overlay + overlay + reveal (often 1 1/4"–1 1/2") | Cabinetmaking formula, not a fixed standard |
| Standard/soft-close side-mount slide clearance | ≈1/2" per side (≈1" total) | Common industry practice |
| Soft-close undermount slide box width tolerance | Often within ≈1/16" of manufacturer formula | Manufacturer specification — verify per model |
| Cup hinge boring (standard and soft-close) | 35mm cup, same series overlay | Manufacturer specification |
| Face-frame bottom rail notch for undermount slides | Per slide manufacturer's installation instructions | Manufacturer specification — not universal |
Common Clearance Mistakes on Face-Frame Cabinets
- Assuming a soft-close undermount slide will fit a drawer box originally built for standard side-mount slides.
- Ordering a narrow center stile without checking the combined overlay of both doors plus the desired reveal.
- Mixing hinge lines from different manufacturers and assuming the boring pattern and overlay will match.
- Skipping the bottom-rail notch check when converting a face-frame cabinet to undermount slides.
- Cutting a full set of drawer boxes before test-fitting one box with the actual hardware installed.
Frequently Asked Questions
Do soft-close hinges need a different door reveal than standard hinges?
No. Soft-close cup hinges use the same 35mm cup boring, mounting plate offset, and overlay amount as standard (non-soft-close) hinges of the same series. The soft-close action comes from a built-in damper or spring cartridge inside the hinge arm, so it does not change the reveal or overlay math on a face-frame cabinet.
How much clearance do soft-close drawer slides need compared to standard slides?
Side-mount soft-close slides generally use the same physical envelope as standard side-mount ball-bearing slides, commonly planned around 1/2 inch of clearance per side (about 1 inch total) between the drawer box and the cabinet opening. Soft-close undermount slides are the exception: they typically require a more precise box width, often within about 1/16 inch of the manufacturer's stated formula, because the soft-close mechanism is built into a narrower, closer-tolerance track.
Why does my face-frame cabinet need to be notched for undermount slides?
Undermount slides mount to the underside of the drawer box and run along brackets near the back and bottom of the cabinet opening. On a face-frame cabinet, the bottom rail of the frame can sit in the path of the slide bracket or the drawer box's forward travel. Many face-frame boxes need the bottom rail notched or relieved so the slide mechanism and drawer box can move freely without binding on the frame.
What is a good reveal gap between full overlay cabinet doors on a face frame?
A reveal of about 1/8 inch between adjacent full overlay doors and drawer fronts is a common industry planning guideline. Some cabinetmakers use as little as 1/16 inch for a tighter look or up to 3/16 inch for more forgiving alignment. The exact reveal is a design and construction-tolerance choice, not a building code requirement.
How wide should a center stile be for two full overlay doors on a face frame?
As a starting formula, add the overlay amount of each door to your desired reveal gap. Two doors with a 1/2 inch overlay each and a 1/8 inch reveal need a center stile of at least 1 1/8 inch, though many cabinetmakers use 1 1/4 to 1 1/2 inch for easier hinge adjustment and a more forgiving margin for construction variance.
Can I switch standard hinges or slides to soft-close versions without changing my cabinet boxes?
For doors, yes in most cases, because soft-close cup hinges typically share the same boring pattern as standard hinges from the same manufacturer series. For drawers, side-mount soft-close slides usually swap in without changes, but switching from a standard side-mount slide to a soft-close undermount slide often requires different drawer box dimensions and, on face-frame cabinets, may require notching the frame.
Before You Order Cabinet Hardware
Face-frame clearance problems are far cheaper to catch on paper than after the boxes are built. Before placing a hardware order:
- Confirm whether each cabinet is face-frame or frameless, since this changes every clearance calculation in this guide.
- Decide on side-mount or undermount slides first — this decision drives the drawer box dimensions, not the reverse.
- Calculate your center stile width using the overlay-plus-reveal formula before finalizing door sizes.
- Pull the actual cut sheet for your chosen slide and hinge models rather than relying on general industry figures alone.
- Check face-frame bottom rails for required notching if you're using undermount slides on existing boxes.
- Build and test-fit one sample drawer box before committing to a full production run.
Getting these clearances right the first time avoids the two most common callbacks in cabinet hardware installation: drawers that bind partway open, and full overlay doors that collide or leave an uneven reveal at the center stile.