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I am creating simple roof 'hipped' on a building (mesh cube) and want to give it a precise 'thickness'. What is the correct method? I have tried divided the top surface of the cuve with loop cut, selected the edge and extruded on the Z axis with a keyboard command eg E Z 55. To give it thickness I have tried selecting each (top) face of the roof using a keyboard command E Z 0.2 which does not work for me. I have also tried using the extrude 'tool' but cannot work out how to extrude a precise amount eg 0.2

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    $\begingroup$ I'm not sure what you mean, if you press E then 0.2 right away it will give your roof a thickness of 0.2 as expected... $\endgroup$
    – moonboots
    Apr 22, 2023 at 8:33
  • $\begingroup$ And so it does. I assumed (obviously incorrectly) that after pressing E I needed to press the axis I wanted to extrude along (and then 0.2 eg E Z 0.2)). Does Extrude always default to the Z axis otherwise why doesn't it extrude along say the X axis? $\endgroup$ Apr 22, 2023 at 10:45
  • $\begingroup$ The faces Z axis is the face normal axis, so it makes sense that by default it will extrude along the faces Z axis $\endgroup$
    – moonboots
    Apr 22, 2023 at 12:57

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Extruding using E will by default use an axis that is normal to the faces.

In your situation, as the roof is symmetrical, this will be Z.

If you hit EZ, that will remove this default axis, and let you extrude following the mouse movements.

So you just need to press E then the value you want.

If you want to use the extrude tool, simply use it then go to the operator panel and enter the value you want:

enter image description here

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