3m Fibre Cement Wall Cladding Asymmetric External Corner Window/Door Trim

These asymmetric external window and door trims are designed to protect the corners of your windows and doors while also facilitating the installation of your fibre cement boards around these areas.

These trims are specially shaped to fit on either side of a door or window, with the 90-degree angle section providing a snug fit for the corner.

Thanks to the flat edges along both sides of the trim, you can easily attach fibre cement wall cladding boards to the surface of the trim and to the sides of your windows and doors.

How Do You Install These Trims?

Installing these Asymmetric Window and Door Trims is straightforward: simply cut the trim to the appropriate length or width of your window or door and leave enough space to accommodate a windowsill or step if required. Then, use Fibre Cement 38mm screws to secure the trim to the window or door. This method ensures a sturdy and durable hold for years to come.

Full Specifications:

Measurements: 34mm x 13mm x 31mm x 31mm x 26mm x 34mm
Length: 3m
Thickness: 1mm
Weight per trim (approx.): 1.53kg 

What are the different fibre cement trims?

Symmetrical Corner Trims are for the main corners of a building, used if the cladding is being fitted around the building where two faces meet. If you are not cladding both faces, then you would use a connection/ end profile to finish the edge instead.

Asymmetrical Corner Trims are for recess’, such as doors and windows if you are cladding into the recess. Then you would need a connection/end profile at the back of the recess to complete the finish. If you are not cladding the into the recess’ then using an asymmetrical corner trim may still be beneficial as it will hide the batten the fibre cement is sitting on. Unless you would like to use an end profile and finish the showing batten by other means.

Internal corners are used where the cladding meets on an internal edge, where both sides are being cladded. If the cladding were to finish at this edge, you would use the connection/end profile instead.

Connection/ End profiles are used where you finish the edge of the cladding. This could be around windows doors, or ends of a wall where the cladding stops and does not continue around any walls or recess’.

Starter Trims are used above windows and doors and along the bottom of a wall to start the cladding off and support the bottom board so that it is not overhanging any area unsupported.

Perforated Closures are used in conjunction with the starter trims, but can also be used along the top of the wall to allow airflow throughout.