7.5 Add Windows

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The Add Windows feature allows windows to be created on the Revit model directly from FenestraPro. To use this feature, the Spatial Elements option should be chosen when opening FenestraPro.

These windows can have custom dimensions and glazing specifications and will use FenestraPro window families but these may be later changed for other window types with similar properties.

The Add Windows feature only becomes available when a solid wall is selected from the Revit model. If there is glazing present on this Surface already, this feature may not be available.

Adding Windows using FenestraPro for Revit

When the Add Windows button is first clicked, the FenestraPro glazing family will be loaded into the Revit project (a message window will advise of this). The button should then be clicked again to begin the window creation process. If this feature has been used before and the glazing family is already loaded, the Add Windows dialog window will open.

There are 4 steps to creating windows using this feature.

  1. Set the method for calculating the number of windows required. This will be either Target Solar Load, Maximum Solar Load or Target Percentage Glazing.

If you input a value into one box and then click on another method, the one that is currently checked will be used. The unchecked methods, even if they have a value in the box, will be ignored.

  1. The Window Dimensions should be input (Width, Height and Sill)
  2. The Glazing Specification should be selected
  3. Click on the Preview Windows button to view the proposed new glazing

Note: Specification and Dimensions may be later adjusted and the These may be adjusted later and the Preview Windows button used again to see changes.

A suitable Façade should be selected on the Revit model where windows are to be created. This Façade may be selected on the Revit model by highlighting the wall or from the Façade Navigator.  When you select a wall on the model, all Surfaces on that model face will be selected in the Façade Navigator. You may only wish to select one or two Surfaces. If this is the case, uncheck some Surfaces in the Façade Navigator.

You may also select the desired Surfaces from the Facade Navigator directly, if you know the Surface numbers or by watching the highlighting on the model.

Setting parameters for window creation


As a basis for window creation, Target Solar Load, Maximum Solar Load, or Target Percentage Glazing should be set. The window dimensions and separation distances should then be set, or the Equally Spread button can be used to separate the windows.

Note: the number of windows on the Surface may prevent your input for Window Separation being used if it is too wide. For example, if you have 5 windows on the Surface and you wish to have a separation between each window of 3 feet, this may not be possible and the value will adjust in the input box to one which can be accommodated.

In the image below, even though a value of 4 feet was input, only a maximum distance of 1.25 feet is possible between the windows.

Window separation setting is optional

You may also select Surfaces independently in the Generate Windows dialog and apply settings just for that Surface. In the example shown, Surface 1 and Surface 36 may be selected separately, and different settings applied to each.

Glazing specification can also be set here, and the windows may then be previewed (Choose Preview Surface to see display only that Surface whose Tab is currently highlighted or choose Preview Windows to show all window instances). Each Surface will have its own tab, and windows on this façade alone can be modified separately from those on other façades by setting the dimensions, quantity, and separation distances.

The required glazed openings with these settings are then written to the Revit model using the Create Windows button. FenestraPro will then update its results by including these changes and display them in the Charts. Please wait for the results to be updated and for calculations to complete.

Please use the Refresh button to update the results when you have finished creating windows.

Window options on each Surface may be independently controlled

The windows generated are FenestraPro window types with custom properties which will display in Revit’s Edit Type can be edited. These windows can be resized in FenestraPro or the dimensions can be modified as normal in Revit’s Properties Palette. The windows may be replaced by other window types that are loaded in Revit. The replacement windows should contain similar dimensions and thermal properties to satisfy the target goals of window creation.

You may reverse the window creation by clicking on the Undo button in Revit which will return the model to the previous state.

You will see the new windows listed in the Façade Manager and may click on the entry to highlight it on the model.

Writing the windows to the Revit model

Note: If adjacent Curtain Walls are very close to the solid wall (abutting) or an internal wall is abutting the solid wall, ‘Add Windows’ may not work. These should be moved 1 foot / 300mm away from the solid wall to allow this function to operate. This is due to the edges of the solid wall (where windows are to be placed) being too close to existing glazing and avoids the two adjacent walls joining incorrectly. In this case the ‘Add Windows’ function may be disabled.

Note: The windows created will be the FenestraPro window family. Thermal properties for these windows are custom parameters and will display below the Analytical Properties in Edit Type. These properties override any that are shown in Revit so editing properties under the Analytical Properties section will have no effect. You may edit the custom properties for these windows directly.

Note: Where the Add Windows function does not become available for a selected area on a model, this may be due to adjacent glazing being too close to the solid wall. Glazing that abuts a solid wall where windows are to be added, may prevent placement of windows there as the joint condition cannot be verified.

This may be overcome by moving the glazing away from the solid wall  (eg. 3 feet / 1 metre). This may also occur where internal glazed partitions abut a solid exterior wall – the Add Windows function may be disabled.

If Windows are created and then deleted – please use the Refresh button to update the Energy Model reference since these windows will remain in FenestraPro’s list and will need to be removed. Any time geometry is modified on the model – the current Energy Model will need to be updated to reflect the current model condition.


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