Flush Wall Slab Hidden Door
Product Description
The Maderra Secret Wall Panel Door transforms an ordinary wall into a seamless, functional architectural feature. Designed to blend perfectly into any accent wall, this concealed door hides a secret compartment or passage behind a fully integrated wall slab.
Unlike traditional hidden doors, the Secret Wall Panel Door is built with the exact thickness of your wall, ensuring a flush, flawless finish. Whether your wall measures 4.5" or more, the door slab is customized to match it precisely, creating a completely integrated look.
From the front, it appears as part of your wall design—ideal for creating elegant accent wall panels, board and batten designs, or modern flat wall systems. From the back, it functions as a standard door, providing discreet access to a hidden space or storage compartment. Inside the slab, built-in shelving offers additional concealed storage for valuables, documents, or emergency items.
Each unit includes a pre-hung door frame and concealed pivot hardware for smooth operation. The interior features a decorative panel design for a refined architectural touch that looks as beautiful as it is practical.
Perfect for homeowners, designers, and builders who value style and discretion, the Maderra Secret Wall Panel Door offers a modern way to turn any wall into a hidden opportunity.
Product Specifications
Wall Integration:
Door slab thickness is built to match the exact wall depth (typically 4.5″ for standard walls). Custom wall thicknesses available upon request.Design Intent:
• Designed to seamlessly integrate into any accent wall, including board and batten, shiplap, or flat-panel wall systems.
• Accent wall materials are not included. Customers are responsible for creating their own wall design to cover the front of the door slab.Hidden Compartment:
• The interior of the slab includes built-in shelving for concealed storage.
• Ideal for securing valuables, documents, or emergency supplies.Frame & Hardware:
• Includes a pre-hung door frame and concealed pivot hardware for smooth, durable operation.
• Factory-aligned frame ensures precise installation and door swing balance.Operation:
• Opens like a standard door from the concealed side, providing easy access to the interior compartment.
• Can be configured for left-hand or right-hand swing.Interior Finish:
• The back of the door features a decorative raised or recessed panel pattern, adding a refined designer look to the interior side.Material:
• Built from engineered MDF for strength, precision, and stability.
• Ready for paint-grade finishing or can be ordered with custom finish options.Installation:
• Ships pre-hung for simplified on-site installation.
• Suitable for standard framed wall openings.
• Installation can be completed by homeowners or any local contractor.
Made in the USA | Custom-Built to Order | Hidden Functional Design
How to Measure Your Door Opening
To ensure your hidden bookcase door fits perfectly, please follow these simple steps when measuring your Rough Opening (RO):
Measure from the door jamb — not the door stop.
The door stop will be removed when we install the prehung door frame, so please measure only from jamb to jamb.Take two measurements:
RO Width: from the inside of one door jamb to the inside of the opposite jamb.
RO Height: from the floor to the bottom of the top jamb.
Submit your exact measurements.
Once we receive your measurements, Maderra will automatically deduct ¾” from the height and ¼” from the width.
This provides the necessary clearance and adjustment space for smooth installation of the prehung door frame.
See video:
Clearance Reduction by Swing Type
Inswing Doors: Reduce the walkthrough width by approximately 5.7 inches.
Example: A 36-inch RO will provide a 30.3-inch walkthrough opening.
Outswing Doors: Reduce the walkthrough width by approximately 12.5 inches.
Example: A 36-inch RO will provide a 23.5-inch walkthrough opening.
Will a Hidden Bookcase Door work in my opening?
Yes. Our hidden bookcase doors work in all three layouts shown.
Flush opening (flat wall)
Use our Flush-Mount Hidden Door.
The unit can be built outswing or inswing. See clearances below.
Single-side return (one short wall at the opening)
Installs the same as a flush opening.
Choose outswing or inswing and follow the required clearances.
Hallway / recessed (three-sided return)
At the hallway entrance: treat it like a flush opening.
Inside the hallway: you must frame a proper rough opening inside the corridor with a header and jack studs so the prehung unit and casing can fasten securely. Provide at least 2.5 inches of jack-stud width around your door entry.
Swing options
- Outswing: the bookcase swings toward you as you enter the room/hallway.
- Inswing: the bookcase swings away from you into the next room/hallway.
Minimum side clearances (critical)
These allow solid fastening to the jack stud and room for casing around the opening.
- Outswing: 2.5 inches minimum clearance from the adjacent return/side wall.
- Inswing: 4.5 inches minimum clearance from the adjacent return/side wall.
Framing & Clearance Requirements
For proper installation, all Maderra doors must be installed in a standard framed opening that includes a header and jack studs on both sides.Wall thickness: A minimum of 2.5″ is required to install casing and trim around the door entry.
Inswing doors: Require at least 4.5″ of clearance from any wall or obstruction on the side the door swings into. This ensures the door can open fully into the room.
Outswing doors: Require a minimum wall thickness of 2.5″ for proper installation and casing placement.
Hallway installations: If your door will be placed in a hallway, it still be framed with jack studs and a header, and may require custom adjustments to fit the space properly.