Triotherm insulated door upstands can be configured to suit a wide range of door, window and threshold details.
Different combinations of Triotherm+ profiles, Triotherm Structural Insulation Boards and MultiPro Structural Insulation Boards allow the upstand dimensions to be adapted to the individual project requirements.
This makes the system suitable for standard entrance doors, floor-to-ceiling windows, sliding doors and other large glazed elements.
Key Features and Benefits
Flexible Dimensions
Triotherm door upstands can be configured in a wide range of widths and heights to suit different frame depths, floor build-ups and threshold positions.
Standard Triotherm+ profiles can be combined with structural insulation boards where additional width is required.
Structural and Thermal Performance
Triotherm+ and MultiPro are structural thermal insulation components designed to combine load transfer with low thermal conductivity.
This allows the door or window frame to be structurally supported while maintaining continuity with the building’s insulation layer.
Suitable for Bespoke Details
Where standard profile dimensions are not sufficient, different components can be combined to create a bespoke upstand configuration.
This is particularly useful for:
- deeper door frames
- sliding-door thresholds
- lift-and-slide systems
- floor-to-ceiling glazing
- wide threshold profiles
- unusual floor build-ups
Simple On-Site Assembly
Triotherm+ profiles incorporate an integrated dovetail connection, allowing multiple profiles to be joined to create longer upstands.
Structural insulation boards can also be cut and combined with Triotherm+ profiles where additional width or height is required.
This allows many upstands to be configured directly on site using standard tools.
Determining the Required Upstand Height
The correct upstand height depends primarily on the floor build-up and the intended position of the door or window frame.
Relevant factors include:
- floor insulation thickness
- screed or finishing concrete thickness
- floor covering
- finished floor level
- threshold profile
- bottom frame position
The required height should be calculated from the actual project dimensions rather than selected from a generic standard size.
For more detailed guidance, see:
Required Dimensions for Triotherm Door Upstands
Determining the Required Upstand Width
The required width depends mainly on the depth of the door or window frame and the intended support area beneath the threshold.
Typical configurations include:
85 mm
Triotherm+ profile for many standard frame depths.
100 mm
Suitable where a wider structural support area is required.
120 mm
Can be achieved by combining a Triotherm+ profile with an additional structural insulation board.
170 mm
Can be created using two rows of Triotherm+ profiles for deeper threshold constructions.
These examples illustrate typical configurations only. The final upstand width should always suit the actual frame and threshold detail.
Frame Overhang
Where appropriate, the door or window frame may extend slightly beyond the Triotherm+ upstand.
An overhang of up to approximately 20 mm on each side can be useful in some details, for example to simplify the connection to internal floor finishes or external paving.
The exact arrangement should always be coordinated with the frame geometry, support points and waterproofing detail.
A Flexible System Rather Than a Single Standard Size
The main advantage of the Triotherm system is that the door upstand does not have to be limited to one fixed dimension.
By combining the available structural insulation components, the upstand can be configured to suit:
- different frame depths
- different floor build-ups
- different threshold positions
- different structural substrates
- different thermal envelope positions
This allows the structural support beneath the door or window frame to be coordinated with the thermal design of the building.