FLUSH, PUSH SIDE
Leaf and frame in one plane with the wall on the push side. The standard solution for corridors and public areas.
corridors, offices, apartments
INVISIBLE FLUSH
CONCEALED DOORS
INVISIBLE concealed doors are installed flush with the wall plane: no architraves, with invisible hinges and a frame that disappears under the plaster. They are used in hotels, offices, residential and public interiors where the door must dissolve into the wall or become part of a wall panel. DPS selects the system for the wall type and finish, issues shop drawings (KMD), manufactures the door sets at partner production sites and installs them before final finishing.
01 · CONSTRUCTION
WHAT A CONCEALED DOOR
IS MADE OF
- CONCEALED FRAME
- An aluminium profile fixed in the opening and skimmed together with the wall. The reinforcing edge of the frame prevents cracks around the opening as the building settles.
- DOOR LEAF
- Laminated timber frame or aluminium frame with core and MDF facing. The leaf edge is lipped, and the face is prepared for paint, wallpaper or cladding.
- CONCEALED HINGES
- Adjustable hinges fully recessed into the frame and the leaf edge. Selected by leaf weight and number of opening cycles.
- MAGNETIC LOCK
- Silent magnetic latch with a strike plate flush with the frame. To the brief — with privacy bolt, key cylinder or electromechanical function.
- SEALS
- Seal line in the rebate and automatic drop seal for acoustic and smoke-tight versions.
- READY FOR FINISHING
- Primed leaf and frame surface ready to be painted in the wall colour, or a substrate panel for veneer, laminate, tiles or wall panels.
02 · TYPES AND OPERATION
OPENING TYPES
AND SYSTEMS
REVERSE OPENING
Door flush with the wall on the pull side: hinges and frame are concealed and the wall on that side remains continuous. Requires precise coordination of wall thickness and finishes at the shop drawing (KMD) stage.
hotel rooms, bathrooms, walk-in wardrobes
DOUBLE-LEAF CONCEALED
Two leaves in a common concealed frame with top and bottom flush bolts on the passive leaf. For wide and floor-to-ceiling openings.
meeting rooms, living rooms, halls
POCKET SLIDING
The leaf slides into a pocket cassette in the wall; the opening is framed by a profile with no architraves. Saves space in front of the opening.
guest rooms, apartments, medical consulting rooms
DOUBLE-ACTING
Open both ways on a concealed pivot or hinges that return to the zero position. Used for high-traffic passages without hold-open.
restaurant dining rooms, service passages
FLOOR-TO-CEILING AND WITH TRANSOM
A full room-height leaf or a concealed transom above the door in the same plane. The height is set by the design and the permissible leaf weight.
lobbies, apartments, Class A offices
FIRE-RATED CONCEALED
Concealed door set with a fire-resistant core, intumescent seal and closer. The fire rating is confirmed by tests of the complete door set.
hotel corridors, plant rooms, offices
ACCESS HATCHES AND INSPECTION PANELS
Concealed doors for risers, distribution boards and niches with push latches, in the same finish as the wall.
service niches, electrical boards, storerooms
Diagrams are schematic: plan view; for constructions with a transom — front elevation.
03 · FINISHES AND MATERIALS
LEAF
FINISHES
PAINT-READY
Leaf and frame are primed and painted the same colour as the wall. The most common option for hotels and offices.
FOR WALLPAPER
Prepared surface for wallpaper or textile coverings with the pattern matched to the wall.
VENEER
Natural veneer facing with grain matched to the wall panels. The layout must be agreed at the design stage.
ENAMEL
Factory finish to RAL or NCS for projects where painting on site is undesirable.
PANELS AND TILES
Reinforced leaf for porcelain tile, mirror or decorative panel cladding, allowing for its weight.
ALUMINIUM EDGE
Painted or anodised leaf edge that protects the edge and highlights the door outline.
04 · FRAMES
FRAMES
AND WALL TYPES
- Plasterboard — the frame is fixed to the metal stud framing of the partition and the opening is reinforced with studs; wall thickness is coordinated with the frame depth.
- Brick and blockwork — the frame is fixed with anchors and plastered over reinforcing mesh; the accuracy of the opening geometry is critical.
- Cast-in-situ concrete — a true opening within the design tolerances is required, with cast-in fixings where needed.
- Wall panels — a frame for cladding that makes the door part of a panelled wall with a consistent joint pattern.
- Wet areas — moisture-resistant core and edge sealing for bathrooms and spa areas.
05 · PERFORMANCE
TECHNICAL
PERFORMANCE
UP TO 3000 MM
LEAF HEIGHT
Standard heights 2000–2400 mm; taller as designed, with a check of weight and number of hinges.
40–60 MM
LEAF THICKNESS
Depends on the core: interior, acoustic or fire-rated version.
RW 30–36 DB
SOUND INSULATION
For acoustic versions with a seal line and drop seal; the actual value depends on the wall and installation.
EI 30 — EI 60
FIRE RESISTANCE
For fire-rated concealed systems as designed, where a tested complete door set is available.
UP TO 80 KG
LEAF WEIGHT
Guide value for swing leaves on concealed hinges; heavy cladding requires reinforced hinges.
180°
OPENING ANGLE
Concealed hinges allow opening up to 180° depending on the model and adjacent details.
The values given are indicative and are confirmed by certificates and test reports for the specific project.
06 · HARDWARE
HARDWARE
AND AUTOMATION
- Concealed hinges — 3D adjustment, selected by leaf weight and load class.
- Magnetic locks — silent latch, privacy bolt for bathrooms, cylinder version.
- Push latches — handle-free opening for a completely smooth wall, inspection doors and cupboards.
- Concealed closers — built into the leaf or frame for fire-rated and hotel doors.
- Access control — electromechanical locks, card readers for guest rooms and offices, cable transfers into the frame.
- Drop seals — automatic bottom sealing for sound insulation and smoke-tightness.
- Handles — recessed or minimalist rose handles in a finish coordinated with the interior.
07 · APPLICATIONS
WHICH
BUILDINGS
HOTELS
Reverse-opening guest room and bathroom doors, acoustic versions and access-controlled concealed doors in corridors.
OFFICES
Meeting room and office doors in painted walls and wall panels, double-leaf concealed doors for halls.
RESIDENTIAL COMPLEXES
Concealed doors for paint and wallpaper in finished apartments, pocket sliding doors for compact layouts.
RESTAURANTS AND FOOD SERVICE
Double-action concealed doors for service passages and doors to plant rooms in the dining room finish.
HEALTHCARE
Pocket sliding and smooth concealed doors with easy-to-clean surfaces.
PUBLIC BUILDINGS
Inspection doors and fire-rated concealed systems for plant rooms and corridors.
08 · STANDARDS AND DOCUMENTS
FOR DESIGNERS
AND CLIENTS
REGULATORY FRAMEWORK
- GOST 475-2016General technical requirements for timber and composite door blocks.
- GOST R 53307-2009Fire resistance test method for doors and gates, applied to fire-rated concealed systems.
- GOST 27296-2012Methods for field measurement of the sound insulation of enclosing constructions, including door blocks.
- SP 51.13330.2011Regulatory requirements for the sound insulation of rooms, including hotel rooms and residential apartments.
- GOST 5089-2011Requirements for door locks and latches.
- Federal Law No. 123-FZTechnical regulations on fire safety requirements governing the use of fire-rated doors.
The editions of documents in force at the date of the contract apply.
WHAT WE PROVIDE
- Typical concealed frame installation details for different wall types in DWG
- BIM families for Revit — on request
- Concealed door specification template with opening types and finishes
- Coordination of wall thickness, finish and opening side at the shop drawing (KMD) stage
- Product data sheets, certificates and test reports for fire-rated and acoustic versions
- Site visit for 3D survey of openings before production
09 · FAQ
FREQUENTLY ASKED
QUESTIONS
At what construction stage is the concealed frame installed?
The frame is installed before skimming and final wall finishing; the leaf is hung after painting or wallpapering. That is why the frame type, wall thickness and opening side are fixed in the shop drawings (KMD) in advance.
Can a concealed door be fire-rated?
Yes, provided a door set is used that has been fire-tested complete with frame, core and seal. The fire rating and permissible sizes are defined by the test report and the design.
What sound insulation can realistically be achieved?
Acoustic versions with perimeter seals and a drop seal achieve around Rw 30–36 dB according to laboratory data. The result in the building depends on the wall, junctions and quality of installation.
Will cracks appear around the door?
The frame has a reinforcing edge that is plastered over mesh together with the wall. If the installation method and finish drying times are observed, the outline stays clean.
What is the maximum leaf height?
Floor-to-ceiling height is possible as designed; the limits are the leaf weight, hinge load and wall stiffness. For large heights DPS selects the number of hinges and a reinforced leaf.
What is a reverse-opening door?
It is flush with the wall on the pull side, so neither hinges nor frame are visible from that side. It is chosen when the wall of the corridor or room into which the door opens must stay continuous.
10 · GALLERY
IN INTERIORS
AND ON SITE
WE WILL FIND THE SOLUTION
FOR YOUR PROJECT
SEND US YOUR DOOR SCHEDULE OR FLOOR PLANS — WE WILL PREPARE A SPECIFICATION AND COSTING.