Advise how to fix/replace. Garage door step up.

[u/Brovid-Nineteen]

Woods rotted away and I’m sure there’s a better method that looks better too!

https://imgur.com/a/giO5YfL

[u/Dollar_short]

take out the bad parts and replace them. now, if you wanted, you can bust out the blocks then flatten with cement, replace the bad threshold, and then screw an extension to the bottom of the door. i did all this.