Draft it Help

Available in: Architectural Only

Use this command to insert a roof.

The command creates by default a 'line' representation of the roof in the drawing plan view. Any parameters within the settings that relate to the 3rd or 'Z' axis are used in the creation of Elevations and in the 3D Viewer.

Select the 'Roof' button Roof button and the roof dialog box appears. This Dialog box has five tab pages, Gable, Hipped, Barn Hip, Lean to corner Hip, Lean to Gable, all of these are shown below.

Roof gableRoof hipped

Roof barn hipRoof lean to corner hip

Roof lean to gable

 

Select the tab required, the parameters common for all types are:-

Roof Thickness

The overall thickness of the roof construction. This value is then used in conjunction with several other values to calculate the ridge height.

Facia width

The facia width.

End overhang

The overhang value to be applied to the roof ends

Side overhang

The overhang value to be applied to the roof sides

 
The following table lists the other roof parameters and which roof types use them.        

Other Roof Type Parameters

Parameter

Description

Where used

Left Side pitch        

Pitch value to be applied to the roof left side

 G

Right Side pitch

Pitch value to be applied to the roof right side

G

Barge Board width

This field defines the barge board width

G, BH, LG

End pitch

Pitch value to be applied to the roof end

H, BH, LCH

Side pitch

Pitch value to be applied to the roof side

H, BH, LCH, LG

Hip Line pitch

Pitch value to be applied to the roof side

H, BH, LCH

Roof type:- G = Gable, H = Hipped, BH = Barn Hipped, LCH = Lean to Corner Hip, LG = Lean to Gable

 

Once all of the settings are correct click OK, the dialog box closes. The insertion procedure for Gable, Hipped and Barn Hip roofs is the same as follows.

 

In the example below the roof to be constructed is shown in green dashed line type.

 

Roof example

The prompt reads:

Indicate wall that roof will be on:

Indicate one of the walls ( at P1 above) on which the roof will be built. Select the required wall and the prompt reads:

Indicate first corner for width of building:

Indicate the first point (P2) that defines the width of the gable/Hip using any of the snaps and input options,  the prompt reads:

Indicate second corner for width of building:

Indicate the second point (P3) that defines the width of the gable/Hip using any of the snaps and input options,  the prompt reads:

Indicate corner for length of building, or [T]ee to join to existing roof:

Indicate a point (P4) that defines the length of the roof using any of the snaps and input options

To tee in a roof the procedure is as above apart from the last prompt, instead of indicating the point for the roof length just press thet keykey (you don't need to press enter as well) and in indicate the roof line (P1 below) of the roof to tee into.

In the example below the roof to be constructed is shown in green dashed line type, the existing roof is blue.

Roof Tee in example

There are only 2 differences when inserting the lean to type roofs is as follows.

1/ The 2nd prompt  'Indicate first corner for width of building:' changes to  'Indicate outer corner of building:' . This point is still defining the width but it also defines the slope direction i.e. the slope toward the outside of the building.

2/ There is no option when indicating the roof length on the final prompt to Tee into an existing roof.

 

See Modifying/Moving a Roof for information on how an roof can be edited.