# Adding thickness to closed shape

**URL:** <https://forums.sketchup.com/t/adding-thickness-to-closed-shape/171591>\
**Category:** SketchUp\
**Created:** [August 1, 2021, 4:52pm UTC](https://forums.sketchup.com/t/adding-thickness-to-closed-shape/171591 "2021-08-01T16:52:46Z")\
**Posts on this page:** 5\
**Page:** 1

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**Author:** ![Johnidi](https://avatars.discourse-cdn.com/v4/letter/j/d07c76/32.png) [@Johnidi](https://forums.sketchup.com/u/Johnidi)\
**Post date:** [August 1, 2021, 4:52pm UTC](https://forums.sketchup.com/t/adding-thickness-to-closed-shape/171591/1 "2021-08-01T16:52:46Z")

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![Screen Shot 2021-08-01 at 12.32.08 PM](https://global.discourse-cdn.com/sketchup/original/3X/8/f/8fea9d7116252095106aee86f9a6d3c3f31732f1.png)  
How can I add a 1/8" wall thickness to this part?

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**Author:** ![DaveR](https://sea2.discourse-cdn.com/sketchup/user_avatar/forums.sketchup.com/daver/32/7601_2.png) [@DaveR](https://forums.sketchup.com/u/DaveR)\
**Post date:** [August 1, 2021, 5:04pm UTC](https://forums.sketchup.com/t/adding-thickness-to-closed-shape/171591/2 "2021-08-01T17:04:55Z")

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Joint Push/Pull would probably be the easiest. You can get it from Sketchucation.

If you share the .skp file it would be easier to give you some good ideas for modeling it.

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**Author:** ![Johnidi](https://avatars.discourse-cdn.com/v4/letter/j/d07c76/32.png) [@Johnidi](https://forums.sketchup.com/u/Johnidi)\
**Post date:** [August 1, 2021, 5:11pm UTC](https://forums.sketchup.com/t/adding-thickness-to-closed-shape/171591/3 "2021-08-01T17:11:31Z")

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Thanks, but after reading about the JPP extension, I didn’t think it would hollow out a shell? I included the sketch up file.  
[Quad\_base.skp](https://forums.sketchup.com/uploads/short-url/uzhKEtkWOex1ajmSdES9eXpcZPh.skp) (312.0 KB)

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<div class="post-metadata">

**Author:** ![DaveR](https://sea2.discourse-cdn.com/sketchup/user_avatar/forums.sketchup.com/daver/32/7601_2.png) [@DaveR](https://forums.sketchup.com/u/DaveR)\
**Post date:** [August 1, 2021, 5:18pm UTC](https://forums.sketchup.com/t/adding-thickness-to-closed-shape/171591/4 "2021-08-01T17:18:33Z")

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Hmmm…

After shifting the group off to the side so there’s only one set of the geometry and correcting the reversed faces…

 ![Screenshot - 8_1_2021 , 12_16_09 PM](https://global.discourse-cdn.com/sketchup/original/3X/1/f/1f0bc494b66dcbf2c542b76fe12c64184f4c4c83.png)

 ![Screenshot - 8_1_2021 , 12_16_20 PM](https://global.discourse-cdn.com/sketchup/original/3X/3/d/3d4ccdd417fbafd622d6b16b5e32b55edf796e69.png)

Joint Push/Pull works just fine for me.

 ![Screenshot - 8_1_2021 , 12_18_19 PM](https://global.discourse-cdn.com/sketchup/original/3X/d/c/dc5375e7665971807c8d1432d590724c6dda270b.png)

By the way, don’t paint back faces. That doesn’t fix the reversed faces. If this is a thing you want to 3D print you need to get face orientation correct. The blue back faces will face the print media while the white front faces are toward air. Adding materials to mask the blue back faces won’t fix them.

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<div class="post-metadata">

**Author:** ![Johnidi](https://avatars.discourse-cdn.com/v4/letter/j/d07c76/32.png) [@Johnidi](https://forums.sketchup.com/u/Johnidi)\
**Post date:** [August 1, 2021, 5:19pm UTC](https://forums.sketchup.com/t/adding-thickness-to-closed-shape/171591/5 "2021-08-01T17:19:48Z")

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Awesome! Thank you for your help. Looks like I’ll get the JPP:)