Order of install - SP2 / WebAPPs/ CUs

I'm going to update our servers with SP2, along with WebApps and CU.. I'm understanding the basic install...

1. install sp2 on each server, one at a time

2. Run the Config wizard on each server after step one is done on all servers on the farm.

3. Install WebApps on each server, one at a time,

4. Run the Config wizard on each server after step 3 is done on all servers on the farm.

But, do I do the same steps for the CU, do I need to run the config wizard on all servers on the farm?

thanks!

Jill T.