<p>Under FreeCAD, I sketched on the face of a solid as follows :</p>

<p><a href="https://i.stack.imgur.com/Qe4nu.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/Qe4nu.png" alt="sketch"></a></p>

<p>My problem is, when I use "Pad a selected sketch", the solid created comprises also the original solid.</p>

<p><a href="https://i.stack.imgur.com/pHI59.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/pHI59.png" alt="created solid"></a></p>

<p>It prevents me, for instance, to get the difference with the first one.</p>

<p>Any idea what may be causing this? How to prevent it?</p>

<p>MyFreeCAD config:</p>

<pre><code>OS: Ubuntu 16.04.1 LTS
Word size of OS: 64-bit
Word size of FreeCAD: 64-bit
Version: 0.15.4671 (Git)
Branch: releases/FreeCAD-0-15
Hash: 244b3aef360841646cbfe80a1b225c8b39c8380c
Python version: 2.7.11
Qt version: 4.8.7
Coin version: 4.0.0a
OCC version: 6.8.0.oce-0.17
</code></pre>

[{'answer_id': 3379, 'author': 'Davo', 'author_id': 4922, 'author_profile': 'https://3dprinting.stackexchange.com/users/4922', 'pm_score': 0, 'selected': False, 'text': '<p>If you just select the face, and pad the face (versus padding the solid), you should not have this problem. </p>\n'}, {'answer_id': 3386, 'author': 'kaldo', 'author_id': 5580, 'author_profile': 'https://3dprinting.stackexchange.com/users/5580', 'pm_score': 2, 'selected': True, 'text': '<p>Ok, I got help on <a href="http://forum.freecadweb.org/viewtopic.php?f=3&amp;t=19756" rel="nofollow noreferrer">this forum thread</a></p>\n\n<p>Using <code>Part Extrude</code> instead of <code>Pad a selected sketch</code> on the sketch will create an independent solid.</p>\n\n<p>It also turns out that, instead of creating the second solid to do a boolean difference, the good way to "cut" my solid is using the <code>PartDesign Pocket</code> tool.</p>\n'}]
['https://3dprinting.stackexchange.com/questions/3375', 'https://3dprinting.stackexchange.com', 'https://3dprinting.stackexchange.com/users/5580/']