ARCHITECTURAL METAL DETAILS

Architectural Metal Trims, Profiles & Skirting Systems

Metal trims connect the details of an interior: the joint between timber panels, the edge of a stone wall, the base of a corridor and the return around a doorway. Xinmao Metal supplies architectural trims developed around the selected profile, material, finish and installation detail.

Explore decorative inlays, edge trims, corner profiles, skirting, opening wraps, ceiling trims, floor transitions and stair nosings. For architects, interior designers, contractors and procurement teams, each category below explains the dimensions to specify, the fabrication details to resolve and the installation conditions to check before ordering.

PROFILE GUIDE

Decorative Strips & Inlay Profiles

Define panel joints, material boundaries and furniture details

T-shaped inlays, flat strips and recessed decorative profiles create controlled lines across timber, stone, tiled walls and fitted furniture. Their visible width is only one part of the specification. The stem, return or concealed fixing edge determines how the strip fits into the surrounding construction and when it must be installed.

A T-profile seated in a finished groove needs a different detail from a trim fixed before the wall panels. Selecting that detail early helps avoid narrow grooves, exposed adhesive and uneven lines across the completed elevation.

T-profile specifications

ItemAvailable configuration
Material304 or 316 stainless steel
Listed profile widths6 / 8 / 10 / 15 / 20 mm; custom dimensions
Material thicknesses0.5 / 0.6 / 0.8 mm; custom options
Listed lengths2.4 / 2.5 / 2.7 / 3 m
Finish optionsBrushed, satin, mirror and selected PVD colours, confirmed by sample
Detail to confirmVisible face, stem dimensions, groove, fixing and joint layout

These dimensions describe the selected T-profile range. Flat strips, solid profiles and formed sections are scheduled separately. The section drawing identifies what each dimension measures.

Fabrication details that affect the finished line

  • Visible face and concealed section: Specify the exposed width separately from the part entering the joint. A narrow face does not establish the groove size or fixing area.
  • Formed and solid profiles: Folded sheet and solid bar have different edge shapes, fabrication routes and fixing requirements. Confirm the actual construction when matching a reference.
  • Junctions and grain direction: Plan straight joints, intersections and corners before cutting. Brushed grain and reflected light should be reviewed across representative joints, not only on a flat colour chip.
  • Length planning: Divide long runs around panel modules, access and handling. Identify where joints remain visible rather than leaving their positions to site cutting.

Installation options

Inserting into a finished groove: Measure the completed groove, check its depth and clean the receiving surfaces. Dry-fit the strip to confirm its level and visible width before applying the specified adhesive. Hold it in alignment during curing and remove residue using a method compatible with the finish. A tight strip should be checked for dimensional interference before it is forced into place.

Fixing before the surrounding panels: Set out the trim against the approved elevation and secure its concealed fixing edge to the agreed substrate. Check that fixing heads and returns do not obstruct the panels. Fit the adjoining finishes, then inspect the exposed line and junctions.

Applications and inspection

Suitable applications include feature-wall divisions, timber-panel joints, stone borders, cabinet details and decorative framing. Inspect for changing line width, local high spots, recessed sections, adhesive staining and mismatched grain at joints. These defects often point to groove variation, substrate irregularity or an unresolved installation sequence.

Discuss Decorative Inlay Profiles

PROFILE GUIDE

Edge Trims & U-Channel Profiles

Finish exposed edges with a profile matched to the facing material

L-shaped trims, U-channels, square-edge and rounded profiles finish exposed tile, stone and panel edges. The section should match the material being enclosed and the way it is installed. A tile trim with a concealed anchoring wing is fitted with the tile system; a cover applied over a finished edge follows a different sequence.

For U-channels, internal clear width, outside width, leg height and sheet thickness are separate dimensions. A nominal profile height should not be used as a substitute for the clear space inside the channel.

Profile specifications

ItemL-shaped tile trimU-shaped tile trim
Material304 / 316 stainless steel304 / 316 stainless steel
Listed profile heights8 / 10 / 12 mm; custom10 / 15 / 20 / 25 mm; custom
Material thickness0.6 / 0.8 / 1.0 mm; custom0.8–1.0 mm; custom
Listed lengths2.4 / 2.5 / 2.7 / 3 m2.4 / 2.5 / 2.7 / 3 m
Critical fit informationLeg dimensions, angle and finished facing levelClear width, leg height, returns and insertion clearance

Forming, edge quality and surface treatment

The bend radius affects how closely a formed profile follows the corner of the facing material. Where a sharper visual edge is required, a grooved-and-bent construction may be considered. Groove position, depth and remaining metal must be reviewed for that section; a sharper corner is not a strength rating.

Channel legs need enough clearance for the agreed assembly without leaving an uncontrolled gap. An overly tight channel can mark the decorative surface or damage the adjoining material during fitting. An oversized channel can make alignment and adhesive control difficult.

Cut ends, returns and closures form part of the product detail. Specify whether an end remains open, receives a cap or meets a corner piece, and include those conditions in the sample review.

Installation sequence

Trims installed with the facing: Establish the finished level, position the anchoring portion and install the facing according to the selected profile detail. Check support beneath the profile and the relationship between its exposed edge and the completed tile or panel surface.

Covers fitted to completed edges: Survey the edge, prepare the receiving surface and dry-fit straight pieces, corners and ends together. Confirm the adhesive or mechanical connection, hold the profile in position as required, and inspect after the fixing system has reached its specified condition. Temporary tape should not be assumed to provide the permanent connection.

Applications and inspection

Use these profiles at tile terminations, wall-panel edges, stone returns, furniture edges and selected opening details. Check for projecting edges, flared channel legs, sharp cut ends, pressure marks and adhesive squeezed onto the visible face. Confirm dimensions against the completed facing build-up before fabrication.

Select an Edge Trim or U-Channel

PROFILE GUIDE

Internal & External Corner Profiles

Resolve the angle, joint and exposed edge together

Corner profiles finish inward and outward changes of direction in tiled walls, stone surfaces, column wraps and decorative panels. Internal corners, external angles, rounded transitions and separate corner pieces serve different details. The right choice depends on the actual angle, the adjacent finishes and whether people can touch the edge.

A neat corner starts with a measured junction. Walls that appear square may vary along their height, and a nominal right-angle trim cannot correct every substrate deviation.

Internal-corner profile specifications

ItemAvailable configuration
Material304 or 316 stainless steel
Listed profile heights8 / 10 / 12 mm; custom dimensions
Material thickness0.6–1.0 mm; custom options
Listed lengths2.4 / 2.5 / 2.7 / 3 m
External and rounded cornersSelected against their own section drawings
Required detailActual angle, leg dimensions, exposed edges and joint type

Corner fabrication and finish control

  • Measure the included angle: Select the section and cutting angles around the real junction. Two 45-degree cuts suit the intended right-angle mitre; they are not a universal solution for an out-of-square corner.
  • Choose the joint before cutting: Butt joints, mitres and dedicated corner pieces produce different visible lines. Show which component continues through the junction and which terminates.
  • Control accessible edges: Review burrs, exposed cuts and sharp points at hand-contact locations. Rounded caps or other edge treatments must match the supplied construction.
  • Plan welded corners: Welding can affect shape and surface appearance. Agree the welding, grinding and finish-restoration sequence before final colour treatment; site welding on a completed PVD face should not be assumed to allow an invisible repair.

Installation and inspection

Check the substrate angle and both adjacent finishes, then dry-fit the corner and adjoining lengths. Confirm the exposed width on each side, joint position and fixing access before securing the components. Complete the neighbouring surfaces without forcing the trim out of alignment.

Inspect mitres for triangular gaps, unequal faces and offset edges. If one leg fits while the other stands away, investigate the angle and substrate rather than filling the difference with a broad sealant line. Check the finished corner for damage and accessible sharp edges.

Review a Corner Profile Detail

PROFILE GUIDE

Metal Skirting & Baseboards

Coordinate the wall base, finished floor and installation method

Stainless steel skirting finishes the junction between walls and floors in corridors, lobbies, workplaces, retail interiors and residential spaces. Its section determines how it relates to the wall, covers the base detail and connects at doors, columns and cabinetry.

Choose a projecting, flush or recessed arrangement before the wall finishes are released. Each has a different relationship to the substrate and requires its own installation space. A front-view photograph cannot establish that build-up.

Dimensions and configuration

ItemConfiguration information
Material304 / 316 stainless steel, selected for the project
Listed height groups40 / 60 / 80 mm and 30 / 50 / 80 mm, depending on the selected profile
Listed thickness groups0.6 / 0.8 mm and 0.8 / 1.0 mm, depending on the selected profile
Finished wall relationshipProjecting, flush or recessed
Fixing constructionBonded, mechanically fixed or matching base-and-cover detail, as selected
Lengths and accessoriesScheduled with joints, corners, end conditions and handling requirements

Height and thickness options are matched to the actual section. They do not establish that every height, thickness and fixing arrangement can be combined interchangeably.

Three wall-base arrangements

Projecting skirting sits forward of the wall finish. Its top edge, projection, ends and transitions into door casings remain visible and should be detailed together.

Flush skirting aligns with the finished wall. The wall-facing thickness, skirting build-up and substrate adjustment must produce a common plane, with a defined joint between the finishes.

Recessed skirting sits behind the wall plane to create a shadow line. The recess needs sufficient depth and a workable installation route. It should be coordinated before the wall is closed or its facing is completed.

Fabrication details

Upper and lower returns change the shape and rigidity of a thin-sheet section. Their geometry can help control the long edge, but straightness also depends on fabrication, handling and the receiving substrate. Increasing thickness alone does not correct an uneven wall.

Plan the joints along long corridor runs and identify the grain direction of each piece. Door ends, column bases, cabinetry and changes of material need deliberate termination details. Include representative corners and joints in the approved finish sample.

For a removable cover, the base, cover engagement and release direction must work as one assembly. A clip-on appearance does not prove that a piece can be installed or removed once adjacent finishes and end closures are in place.

Installation methods

Bonded projecting profiles: Establish the installation datum and inspect the wall for flatness, surface condition and moisture. Prepare or level the receiving construction as specified, dry-fit corners and ends, then bond and support the profile using the selected system. Do not pull a finished metal face against a wavy wall to disguise the substrate error.

Flush or recessed profiles: Confirm the recess and facing thickness before wall finishing. Check the base, joint and installation clearance, fit the skirting in the agreed sequence, and protect it while the adjacent finish is completed.

Base-and-cover systems: Fix and align the base, resolve corners and joints, then check the cover's insertion and removal path. Install the cover and verify engagement along the run. Tight end conditions or an obstructed approach can prevent an otherwise suitable cover from fitting.

Wall-base inspection

Check the upper line, joint width, local bulging, corner edges and transitions at doors. Gaps may arise from the wall finish or base alignment; bulging may involve the fixing or a distorted section. Where cleaning water or moisture is expected, review the concealed substrate and wall-floor interface rather than assuming the metal face protects everything behind it.

Discuss a Metal Skirting Detail

PROFILE GUIDE

Door Frames & Opening Wraps

Develop the face, reveal and closure around the actual opening

Decorative metal opening wraps connect the wall face to the inside of a doorway or architectural opening. The visible casing, reveal panel, return, closure and supporting construction need to be defined separately. Decorative lift surrounds also require coordination with the lift supplier's approved interfaces.

The decision between a one-piece wrap and a split assembly affects measurement, handling, installation and the position of visible joints.

Specification information

ItemProject configuration
MaterialSelected stainless steel grade and approved finish
Opening width and heightVerified clear dimensions and coordinated setting-out information
Reveal depthMeasured wall build-up and required coverage
Face width and returnsDefined on the section drawing
Metal thicknessSelected for the component geometry and fabrication route
Joint arrangementOne-piece, split wrap, butt joint, mitre or separate closure
InterfacesDoor hardware, lift components, stone, wall finishes and lighting where applicable

One-piece and split constructions

A one-piece component reduces some assembly joints, but its geometry is fixed. Survey accuracy, transport protection and the route into the opening become particularly important.

A split wrap separates the face, reveal or closure into coordinated components. Depending on the detail, this can provide assembly adjustment and more manageable pieces. It also creates joints that must be positioned and reviewed for visibility, alignment and fixing access.

Fabrication and junction details

Define how the head meets the jambs: which part runs through, which terminates and whether the joint is square or mitred. Approve a representative corner when the reflection or finish makes small offsets conspicuous.

Review concealed returns and covered areas alongside the visible faces. They still need the support, engagement and fixing required by the chosen assembly. Where metal meets stone, confirm edge coverage and any required slot before the stone is fabricated.

Installation sequence

Measure the opening at several positions, including its width, height, wall depth and alignment. Coordinate the result with door movement, hardware and adjoining finishes before production drawings are released.

Set out and prepare the receiving construction, dry-fit the head and jamb components, then install them in the agreed order. Check the clear opening, joint alignment and closure engagement. Decorative work must not obstruct the operation or required access of the door or lift system.

Common issues to check

If a wrap will not enter the opening, check the survey, component dimensions and insertion route. If the head and jambs are uneven, verify the setting-out datum and substrate. Scratched stone edges or light leaking from a slotted interface can indicate an unresolved clearance, overlap or installation sequence; adding surface sealant may not resolve the underlying detail.

Send an Opening or Door-Surround Drawing

PROFILE GUIDE

Ceiling Trims & Shadow-Gap Profiles

Resolve the ceiling perimeter, lighting edge and maintenance access

Ceiling trims define wall-ceiling junctions, decorative divisions, recessed light channels and selected access-panel edges. Their appearance depends on the completed surfaces on both sides. The visible shadow gap is not necessarily the same dimension as the metal channel itself.

Coordinate the profile with the ceiling layout, supporting construction and services before fabrication. A continuous line in the elevation needs a practical sequence of joints, corners and accessible components behind it.

Specification information

ItemDetail to define
Section dimensionsExposed face, depth, returns, thickness and corner geometry
Ceiling datumFinished level and relationship to the adjoining wall
Joint layoutScheduled lengths, corners and movement provisions where required
FixingConnection to the agreed receiving or supporting construction
Lighting interfacesLuminaire dimensions, mounting, wiring, driver and access
MaintenancePanel release, removal clearance and reinstallation route

Fabrication and coordination

Plan lengths and joints around the ceiling grid rather than concentrating accumulated differences in the last piece. Confirm the corner assembly and the continuity of the intended light or shadow line.

For lighting channels, show the light source, accessories and service route in the section. A decorative stainless steel channel should not be assumed to replace the heat-management components specified for the light fitting.

For access frames, check both the closed view and the opening movement. The panel needs room to release and move clear of adjacent equipment, trims and finishes.

Installation sequence

Establish the finished ceiling datum, then agree the profile's fixing and support with the ceiling contractor. Coordinate concealed components and services before closing the surrounding construction. Dry-fit continuous runs and corners, secure the profiles, and complete the adjoining finishes without moving the established line.

Test access panels and inspect the installation under the intended lighting. The primary suspension and structural attachment follow the project design; the decorative profile alone does not define them.

Inspection under light

Check changing shadow-gap width, offset joints, visible light sources, unwanted light leakage and obstructed access. These issues may involve wall or ceiling levels, the position of the lighting, the section geometry or the removal path. Review the complete interface rather than judging the metal strip in isolation.

Review a Ceiling Trim or Lighting Interface

PROFILE GUIDE

Floor Transition Strips & Threshold Profiles

Match the section to both finished floor levels

Floor profiles finish the boundary between materials and resolve selected doorway or level-transition details. Equal-level transitions, reducer profiles, carpet edges and thresholds use different sections. The appearance of the top surface does not establish how the profile is supported or fixed beneath it.

Start with the finished levels on both sides, including the complete flooring build-ups. A listed profile height is not automatically the maximum level difference it can accommodate.

Profile specifications

ItemFloor transition stripsThreshold profiles
Material optionsStainless steel or aluminium, by selected productStainless steel or aluminium, by selected product
Listed profile heights8 / 10 / 12 mm; custom5 / 8 / 10 / 12.5 mm; custom
Material thickness1.0–2.0 mm; custom1.0–2.0 mm; custom
Listed lengths2.5 / 3.0 m2.5 / 3.0 m
Essential informationBoth floor levels, edge support and fixingFloor levels, door movement and connection detail

Section and fabrication details

Show the profile with both floor finishes, their substrates and the fixing location. Check the support beneath a sloping or projecting section rather than relying on its visible shape.

At carpet junctions, use the intended installed condition of the carpet and underlay. At stone or tile edges, coordinate the edge and support detail. Where a timber flooring system requires movement, the transition must preserve that requirement instead of locking the gap with rigid adhesive or a misplaced fixing.

Plan joints and end conditions along the run, and check door clearance at thresholds. A reducer section also needs review against the applicable circulation or accessibility requirements for its location.

Installation and inspection

Verify the completed or agreed floor levels, dry-fit the selected section and confirm which trade installs each component first. Fix to the defined receiving construction and check support beneath the profile. Open the area to traffic only when the selected fixing and flooring materials permit it.

Inspect for rocking, movement, lifted edges and interference with the door. Noise or flexing under use may indicate a support or connection issue. If one edge stands high, compare the actual floor levels with the section drawing before adding adhesive or reshaping the finished profile.

Specify a Floor Transition or Threshold

PROFILE GUIDE

Stair Nosing & Step-Edge Profiles

Detail the tread, front edge and fixing as one junction

Stair nosings finish the front of selected tiled or clad steps. The profile may cover part of the tread, return down the riser or incorporate a separate surface component. Similar-looking covers can use different fixing and support details.

Select the section around the actual stair construction, surface and conditions of use. Stainless steel grade, colour or brushing alone does not establish slip resistance.

Profile specifications

ItemAvailable configuration
Material304 or 316 stainless steel
Listed profile heights10 / 12 mm; custom options
Material thickness0.5–1.0 mm; custom options
Listed lengths2.4 / 2.5 / 2.7 / 3 m
Section informationTread coverage, front projection, riser return and fixing edge
Surface requirementsSelected finish or specified insert, with relevant performance evidence where required

Fabrication and edge details

Define tread coverage, projection and vertical return separately. Check cut ends, burrs and corner conditions where shoes, cleaning equipment or hands may contact the profile.

Where the design includes grooves or a separate anti-slip insert, identify the actual component, connection and replacement method. Performance claims must correspond to that surface and its stated conditions of use.

Installation sequence

Check the dimensions and alignment of each step, then confirm whether the chosen profile is installed with the facing or applied afterwards. Dry-fit the front edge, verify the fixing and support detail, and resolve the ends before permanent installation.

Complete the assembly according to the selected detail and protect it during adjacent work. Before handover, check each step for loose components, lifted edges, inconsistent projection and accessible sharp points.

Applications and inspection

Profile selection depends on the stair location, facing material, cleaning regime and required performance. Local movement or noise at the front edge calls for inspection of the support and connection. A decorative cover should not conceal an unresolved defect in the underlying step.

Discuss a Stair Nosing Profile

SPECIFICATION & DELIVERY

Materials, Finishes & Fabrication Sequence

Select the substrate for the location

Identify the grade or alloy, material form and thickness on the order. Stainless steel grades and aluminium profiles should be selected around the exposure, component geometry, finish, cleaning and project specification. Colour does not replace the underlying material decision.

Folded stainless steel sheet, solid sections and extruded aluminium profiles use different manufacturing routes. The selected product's drawing should establish its geometry and connection rather than relying on a profile name alone.

Approve the finish on representative details

For brushed surfaces, agree grain direction across straight pieces, corners and adjoining metalwork. For mirror surfaces, review reflection, polishing marks and distortion under representative light. PVD colour should be approved with its underlying texture, gloss and relevant formed details.

A flat sample may not reveal how a corner, return or welded junction will look. Where those conditions are visible, include them in the sample or mock-up. Explore our architectural stainless steel finishes to discuss the intended appearance.

Confirm when forming and finishing take place

The fabrication route may use prefinished sheet or finishing after forming, depending on the component. Cutting, bending, grooving, welding and edge finishing must be considered together. Later work can expose edges, alter a colour layer or change the visible texture, so the intended sequence and repair limits belong in the approval process.

SPECIFICATION & DELIVERY

From Section Drawing to Site Installation

Define the component before quotation

Provide the material, thickness, section dimensions, angle or radius, visible face, finish direction, length and quantity. Identify whether dimensions are internal, external or clear dimensions. Add corners, ends and adjacent materials so the quoted item includes the parts needed to complete the run.

Review the sample and interface

Confirm how the profile sits against the finished surfaces, how it is fixed and which trade installs it first. Review a representative sample where colour, joints, edge quality or installation fit needs agreement. Our shop drawing and value engineering service can support the agreed detailing scope.

Check fabrication against the approved information

Check section dimensions, component shape, cut edges, visible finish and accessory fit against the approved drawings and samples. Agree inspection conditions and acceptance limits for the project rather than assuming one tolerance applies to every profile.

Pack and identify the installation sets

Packing should protect long pieces from bending, separate finished faces and protect exposed ends. Group the covers, bases, corners and closures so site teams can identify the correct combination. Component labels should correspond to the drawing and installation schedule.

Verify site conditions before fixing

Check the substrate, finished levels, dry fit and installation access. Select adhesives and fixings for the actual materials and detail, including temporary support and curing requirements where relevant. A broad adhesive category such as “neutral silicone” does not establish suitability for every connection.

TECHNICAL FAQ

Questions Before You Order

01What dimensions should be shown on a trim drawing?

Show the material thickness, each leg or face, the internal or external dimension convention, angles or radii and overall length. Mark the visible surface and finish direction. Include the adjoining material and fixing detail where they affect fit; a label such as “10 mm U-channel” leaves important dimensions unresolved.

02Can metal trims be fitted after the wall or floor is finished?

Some cover profiles and groove-mounted inlays can be fitted after the adjacent finish. Profiles with concealed wings or fixing edges may need installation earlier. Share the existing construction and proposed section so the installation sequence, fixing access and risk to the completed finish can be reviewed before manufacture.

03Should we choose a bonded profile or a removable base-and-cover system?

Choose around the substrate, loading conditions, appearance and access requirement. A bonded detail needs compatible materials, preparation and curing conditions. A base-and-cover system needs matching components, secure engagement and a workable insertion and removal path. The section and surrounding finishes determine whether future removal is practical.

04Can PVD trims be cut or welded on site?

Later cutting or welding can damage the colour layer or expose untreated edges. Where possible, coordinate lengths, corners and joining before the decorative finish is released. If site work is required, agree the affected locations, protection and acceptable repair method; an invisible colour match should not be assumed.

05How are long runs, corners and end pieces ordered?

Schedule each run against the elevation, then identify the straight lengths, joints, internal and external corners, end closures and connecting components. Consider access and handling as well as appearance. Mark the finish direction and component references so matching pieces can be packed and installed in their intended positions.

06Can a decorative trim replace a movement joint or a rated assembly?

A decorative profile's shape or metal material does not establish movement capacity, fire resistance or another assembly rating. State the required function separately and identify the relevant construction and evidence. Where a joint must move, its fixing and adjacent finishes must preserve the movement allowed by the project detail.

PROJECT ENQUIRY

Send Your Trim Schedule or Section Drawing

Share a CAD section, dimensioned sketch, finish reference or existing detail. Include the application and adjacent materials so the profile can be reviewed as part of the installation.

For a useful initial enquiry, provide:

  • Profile type and section drawing, with internal, external or clear dimensions identified.
  • Material grade or alloy, thickness and required finish.
  • Lengths, quantities and a schedule of corners, ends, bases or closures.
  • Wall, floor, ceiling or opening construction and finished levels.
  • Proposed fixing, installation sequence and any access requirements.
  • Project location, required performance information and target programme.
Discuss Your Project ↗

Share a link that our team can access. Drawings can also be supplied by email after your enquiry.