| 1 |
Two- or Three-Panel Sliding Door |
One or more operating panels slide horizontally behind or beside fixed glass panels.
Common opening width: approximately 1.8–3.6 m (6–12 ft).
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Double glazing is common; low-emissivity coatings, argon filling, laminated safety glass, and solar-control glass can be specified.
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Double glazing typically provides better insulation than single glazing. Performance depends on the frame, spacer, glass coating, and air leakage.
Select a tested U-factor and air-leakage rating appropriate to the local climate.
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Apartments, balconies, compact terraces, and rooms where a swinging door would use valuable floor space.
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The sill must be level and fully supported. Confirm drainage, waterproof flashing, panel clearance, and the direction of operation before ordering.
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Vacuum the track regularly, wash weep holes, inspect weather seals, and clean or adjust rollers when movement becomes difficult.
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Space-efficient, widely available, and suitable for large glazed openings.
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The opening is usually only partly clear, and the track can collect dirt or water.
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| 2 |
French Hinged Patio Door |
Two independently hinged leaves meet at the center and open inward or outward.
Typical clear opening: approximately 1.2–1.8 m (4–6 ft).
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Insulated glass units with low-emissivity coatings are common. Decorative divided-light grilles and laminated glass are available.
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Usually offers good compression sealing when correctly installed and adjusted. The meeting stile and threshold can affect air and water performance.
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Traditional homes, gardens, dining areas, and locations requiring a broad walk-through opening.
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Provide adequate swing clearance. The frame must be plumb and square, and the sill should be properly flashed to prevent water intrusion.
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Lubricate hinges and multipoint locks, check alignment, clean drainage paths, and replace compressed weatherstripping when necessary.
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Wide opening, strong ventilation potential, and a familiar door operation.
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Requires clear floor space and may be affected by wind if opened outward.
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| 3 |
Single Hinged Patio Door with Side Window |
One operating door leaf is combined with a fixed narrow sidelight or wider side window.
Typical door leaf width: approximately 0.8–1.0 m (2 ft 8 in–3 ft 4 in).
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Low-emissivity double glazing, privacy glass, laminated glass, and fixed sidelights can increase daylight without increasing door weight.
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A smaller operating leaf can reduce hardware stress and improve sealing consistency. The sidelight must have compatible glazing performance.
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Narrow exterior walls, kitchens, utility areas, and smaller patios where a double door is unnecessary.
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Verify the handing, threshold height, sidelight position, and local requirements for safety glazing near the floor.
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Inspect hinges, latch alignment, seals, and the sill drainage route. Clean the fixed window and door glazing with non-abrasive products.
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Lower space and hardware requirements than a double hinged door, with useful additional daylight.
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Provides a narrower passage and less flexible furniture access than wider systems.
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| 4 |
Bifold or Folding Patio Door |
Two or more hinged panels fold and stack to one or both sides of the opening.
Common systems contain 3–8 panels, depending on structural design.
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Double glazing is typical; low-emissivity, solar-control, laminated, and acoustic glass options may be available.
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Performance varies significantly with the number of panel joints and seals. More moving joints generally require careful adjustment to maintain airtightness.
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Indoor-outdoor entertaining areas, wide garden openings, restaurants, and warm climates with shaded outdoor living spaces.
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The head, sill, and jambs must be structurally supported. Check the manufacturer’s maximum panel weight, stacking space, threshold drainage, and wind-load requirements.
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Keep hinges, tracks, and rollers clean; check panel alignment; inspect seals; and avoid forcing panels that are obstructed.
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Creates a very wide opening and can provide excellent views when closed.
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More hardware, higher installation precision, and potentially greater maintenance than simpler doors.
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| 5 |
Multi-Slide Patio Door |
Several large glazed panels slide on parallel tracks, often stacking in a pocket or along a wall.
Suitable for openings wider than many standard sliding doors.
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Large insulated glass panels may use low-emissivity coatings, solar-control coatings, laminated glass, or enhanced acoustic glass.
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Can deliver strong thermal performance with thermally broken frames and high-quality insulated glazing, but large glass areas increase solar heat gain risk.
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Large residences, hospitality spaces, commercial terraces, and projects prioritizing uninterrupted views.
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Requires precise structural engineering, a rigid level sill, adequate wall support, and careful coordination of waterproofing and pocket drainage.
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Clean the full track length, keep drainage outlets open, inspect rollers and seals, and arrange periodic professional adjustment for large panels.
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Excellent views, broad openings, and flexible panel arrangements.
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Higher cost and greater sensitivity to settlement, track contamination, and installation errors.
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| 6 |
Lift-and-Slide Patio Door |
Turning the handle lifts the operating panel slightly from the seals, allowing a large panel to roll smoothly; closing lowers it onto the seals.
Often used for large, heavy panels.
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High-performance insulated glazing is commonly used, including low-emissivity and solar-control glass. Laminated glass may improve safety and acoustics.
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The lowered panel can provide effective compression sealing. Confirm tested air, water, and wind performance for the selected size and climate.
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Premium residential projects, exposed coastal locations, high-wind regions, and wide openings requiring smooth operation.
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The supporting structure and sill must accommodate substantial weight. A specialist installer should verify tolerances, drainage, and panel adjustment.
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Keep tracks clean, do not drag the handle, inspect seals, and have rollers or locking hardware serviced if operation changes.
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Smooth operation for large panels with potentially strong weather sealing.
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Usually more expensive and technically demanding than standard sliding doors.
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| 7 |
Center-Pivot Patio Door |
A glazed door rotates around vertical pivot hardware positioned near the center or offset from the center.
Typically selected for architectural entrances and wide single leaves.
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Insulated safety glass, laminated glass, low-emissivity coatings, and solar-control glazing may be specified.
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Performance depends heavily on the pivot design, perimeter seals, threshold, and panel size. Larger leaves require careful wind-load assessment.
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Contemporary homes, architectural terraces, and entrances where a distinctive opening movement is desired.
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Confirm the structural capacity of the head and sill, door swing arc, pivot offset, clearances, and local safety requirements.
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Inspect pivot hardware, keep the threshold clear, lubricate only as directed, and check seals for even contact.
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Distinctive appearance and the ability to accommodate a broad, visually simple glazed leaf.
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Uses swing space and may have more specialized hardware and adjustment requirements.
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| 8 |
Pocket Sliding Patio Door |
One or more panels slide completely into a concealed wall pocket when open.
The pocket must be designed before construction or major renovation.
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Insulated low-emissivity glazing is common. Safety glass is generally required where glazing is near walking surfaces, subject to local code.
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Can perform well when the pocket, frame, seals, and drainage are correctly detailed. Hidden components can make later repairs more difficult.
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Minimalist interiors, new construction, accessible routes, and projects seeking a fully unobstructed opening.
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Requires sufficient wall depth, structural headers, corrosion-resistant drainage components, and access provisions for future hardware service.
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Clean the exposed and pocket-side track where accessible; inspect drainage and seals; do not store debris inside the wall pocket.
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Leaves the opening almost completely clear and preserves usable floor area.
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More complex construction and potentially difficult maintenance if service access is inadequate.
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| 9 |
Outswing Patio Door with Low Threshold |
A hinged glazed door opens toward the exterior and uses a reduced-height or flush threshold where permitted.
Drainage and weather protection are especially important.
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Double insulated glazing, laminated safety glass, low-emissivity coatings, and solar-control glass are common options.
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Can provide good compression sealing when closed, but the threshold and exterior swing side must be designed for wind-driven rain.
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Accessible terraces, mild climates, compact interiors, and locations where interior swing space is limited.
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Use a properly drained sill, sill pan or equivalent flashing, wind-rated hardware, and adequate exterior landing space. Confirm accessibility rules locally.
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Keep the exterior sill and drainage channels clean, inspect hinges and seals, and check that wind cannot overextend the door.
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Preserves interior floor space and can support a low-threshold transition.
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Exposed hardware and seals may face severe weather; wind can make operation difficult.
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| 10 |
Inswing Patio Door with Transom Window |
A hinged glazed door is combined with a fixed horizontal window above the frame.
Useful where additional daylight is needed without widening the door.
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The transom and door can use matching insulated glazing, low-emissivity coatings, laminated glass, or privacy glass.
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A fixed transom can be thermally efficient, while the operating door relies on continuous seals and correct hardware adjustment.
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Tall rooms, traditional façades, narrow exterior walls, and renovations requiring more daylight above a standard door.
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Confirm total assembly height, lintel or header support, structural load transfer, flashing continuity, and safe cleaning access.
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Maintain hinges, locks, seals, and sill drainage. Clean the transom from a safe position without leaning unsecured ladders against the glass.
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Adds daylight and visual height without increasing the door’s clear width.
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Requires adequate headroom and may increase installation complexity and overall assembly height.
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