Use the line tool to draw a vertical edge from the midpoint of your roof to the angled guide you created in step 2.
How to add a roof to an interior sketchup.
This video features the push pull move and offset tool.
2 use the protractor tool to create an angled guide at the corner of your roof.
Erase the vertical edge you drew in step 3 and the guide you drew in step 2.
Easily creates roofs with various parameters in sketchup plugin name.
Watch this tutorial to find out how to make a basic roof in google sketchup the easy to use 3d modelling tool.
Push pull back your triangular gable.
For example a 4 12 pronounced 4 in 12 roof slope rises 4 feet for every 12 feet it runs a 1 12 slope is very shallow and a 12 12 slope is very steep when using the protractor tool sketchup s measurements box understands angles.
Architects and builders often express angles as rise over run ratios.