Slot Grill Mounting Options: T-Bar, Plaster, Bulkhead and Sidewall
A slot grill can be mounted lay-in T-bar, concealed plaster, bulkhead or sidewall. How each works, what to check, and how to specify the right one.
A slot grill can be mounted four ways: lay-in T-bar, concealed plaster, bulkhead, or sidewall. The mounting type decides how the grill meets the ceiling or wall, what the ceiling contractor has to prepare, and how much of the fixture stays visible. Goodwind manufactures linear slot grills in extruded aluminum, in 1 to 6-slot configurations for supply or return air, with all four mounting options available.
Slot Grill Mounting Options at a Glance
| Mounting option | Where it fits | What to settle before ordering |
|---|---|---|
| Lay-in T-bar | Suspended ceilings built on an exposed T-bar grid | Grid module and the grill length that fits it |
| Concealed plaster | Plastered or gypsum ceilings where the frame should not show | Plaster edge detail agreed with the ceiling contractor |
| Bulkhead | Ceiling drops, soffits and steps | The face the grill sits on and the supply direction |
| Sidewall | Wall faces and perimeter zones | Wall opening size and throw direction |
How Each Slot Grill Mounting Type Works
Lay-in T-Bar
Where It Suits
Lay-in mounting suits ceilings built on a visible T-bar grid. The slot grill sits in the grid, so the linear line runs alongside the grid lines. It is a common choice for offices and retail fit-outs.
What to Check
Confirm the grid module early. Modular lengths are easier to match to a grid, and continuous runs need the layout drawn out before the grill lengths are fixed.
Concealed Plaster
Where It Suits
Concealed plaster mounting is for ceilings finished in plaster or gypsum, where the designer wants the slot to read as a clean line cut into the surface. It fits hotels and high-end residential interiors, where uninterrupted ceiling lines matter.
What to Check
The grill and the plaster finish are built by different trades, so agree the edge detail and the sequence before either starts. If the aim is a frameless opening, also compare a trimless slot diffuser and a Flowbar.
Bulkhead
Bulkhead mounting places the grill on a ceiling drop, a soffit or a step in the ceiling. Supply air then leaves from the vertical or lower face of the bulkhead instead of the flat ceiling. Check which face the grill will sit on and which way the air needs to travel, and set the pattern controller to match.
Sidewall
Sidewall mounting sets the grill into a wall face. It suits perimeter supply, and return air where the ceiling void is limited. Confirm the wall opening size and the direction the air should be thrown across the room.
How to Choose the Mounting Type
For MEP Consultants at the Design Stage
Match Mounting to the Ceiling Type
Pick the mounting method from the ceiling drawing, not the catalogue. A T-bar ceiling points to lay-in, a plastered ceiling to concealed plaster, and a ceiling step or wall face to bulkhead or sidewall.
State Supply or Return, and the Throw
Goodwind slot grills come as supply or return plenum assemblies, with pattern controllers for 1-way, 2-way or vertical throw. Put both on the schedule next to the mounting type so the order matches the design intent.
For Contractors at Procurement Stage
Check the Schedule Line by Line
Each line should name the mounting type, number of slots, length, finish and whether a plenum is included. Galvanized steel plenums are an option, so confirm whether the order covers them.
Coordinate With the Ceiling Trade
For plaster and bulkhead work, the grill supplier, the ceiling contractor and the duct installer all work on the same opening. Share the grill drawing with the ceiling contractor before the ceiling is closed.
Slot Grill Specifications
| Spec | Goodwind slot grill |
|---|---|
| Configurations | 1 to 6 slots, supply or return plenum assemblies, continuous runs |
| Material | Extruded aluminum profiles, optional galvanized steel plenums |
| Finish | Polyester powder coat, anodized, custom RAL, woodgrain effects |
| Air control | Adjustable pattern controllers for 1-way, 2-way or vertical throw |
| Mounting | Lay-in T-bar, concealed plaster, bulkhead, sidewall |
| Applications | Corporate offices, airports, hotels, luxury residences, retail |
FAQ
What mounting options are available for slot grills?
Goodwind slot grills can be mounted lay-in T-bar, concealed plaster, bulkhead or sidewall.
Can a slot grill be used for return air?
Yes. Goodwind makes slot grills as supply or return plenum assemblies.
How many slots can a slot grill have?
From 1 to 6 slots, and continuous runs are available.
Can the airflow pattern be changed after installation?
Adjustable pattern controllers allow 1-way, 2-way or vertical throw. Confirm the setting for your project with Goodwind.
To discuss mounting and sizing for your drawing, see the Goodwind slot grill page or contact the team. Related reading: slot grill vs linear bar grill, what a slot diffuser is, and the air distribution design guide.