# Fill PCB empty space with grounded copper

**URL:** <https://librepcb.discourse.group/t/fill-pcb-empty-space-with-grounded-copper/884>\
**Category:** Help\
**Created:** [February 2, 2025, 5:14pm UTC](https://librepcb.discourse.group/t/fill-pcb-empty-space-with-grounded-copper/884 "2025-02-02T17:14:23Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![wayneworkman](https://yyz2.discourse-cdn.com/free1/user_avatar/librepcb.discourse.group/wayneworkman/32/621_2.png) [@wayneworkman](https://librepcb.discourse.group/u/wayneworkman)\
**Post date:** [February 2, 2025, 5:14pm UTC](https://librepcb.discourse.group/t/fill-pcb-empty-space-with-grounded-copper/884/1 "2025-02-02T17:14:23Z")

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Hi,

I’m still very much an electronics noob and LibrePCB noob. I’m designing a board that I’m going to connect pre-built breakout boards to via male/female pin headers. One of the boards has a compass (BNO085) and the compass is sensitive to interference. So what I’m wanting to do is provide it a bit of shielding by putting this on the bottom of the PCB (with everything else on top), and have the bottom & top of the board be continuous sheets of grounded copper, except for the traces needed to connect the breakout boards. So, I’m looking for a way to fill the void areas of the board with grounded copper. I have several ground pins on several breakout boards that could utilize the ground sheet. How can I do that?

Thanks,  
Wayne

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**Author:** ![ubruhin](https://avatars.discourse-cdn.com/v4/letter/u/c89c15/32.png) [@ubruhin](https://librepcb.discourse.group/u/ubruhin)\
**Post date:** [February 3, 2025, 1:58am UTC](https://librepcb.discourse.group/t/fill-pcb-empty-space-with-grounded-copper/884/2 "2025-02-03T01:58:29Z")

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Hi,

Just use planes:

[https://librepcb.org/docs/quickstart/create-project/board/#add-planes](https://librepcb.org/docs/quickstart/create-project/board/#add-planes)