I think losing the fortification level while upgrading your walls shouldn't be a thing. I lost more than half my population because of this and it took me a really long time to recover from the situation.
Upgrading your walls from light to heavy fortifications should not mean you lose your light fortifications while upgrading.
I implore you, please fix this!
#Upgrading walls means downgrading village ?
viscid tulip
midnight flax
Err i dont know what i did differently but iirc i was able to upgrade my wall while keeping the old fort status
Tho that might also be from manor and church towers providing accidental fortification 
viscid tulip
The thing is that I separated my manor, monastery and fort from the town and the few churches I have in my town don't provide enough coverage. So, when I wanted to upgrade my light city walls to heavy city walls, the requirements for having medium density vanished and all teh houses downgraded. Ensued mayhem for my finely tuned economy as everyone was leaving due to the lack of housing...
faint tiger
The trick is to upgrade the walls section by section and ensuring you have enough builders and resources to finish the section under construction before the house fortification status changes.
viscid tulip
Still, I don't think it should be like that, and if you don't know, you don't plan your walls in small sections.
faint tiger
Still, I don't think it should be like that, and if you don't know, you don't pl...
I agree it would be good to have an automated upgrade option where the old wall stays intact until the new one is complete.
uncut geyser
I honestly hate the whole 'downgrade' thing. Nobody is gonna go tear down a building because the right conditions no longer apply. The villagers who care should move out and the building should have a repair / quality factor that needs builders to maintain. Unless a building falls down from complete abandonment / disrepair, then I think it stays at whatever level it upgrades too. And yea, I know it's a game and they needed a mechanic there but I hate that mechanic.
solar herald
You can build the heavy wall a bit outside the light wall. Then delete the light wall when you're done
faint tiger
I honestly hate the whole 'downgrade' thing. Nobody is gonna go tear down a buil...
Agreed. The downgrade timer could also be significantly longer to reflect eventual disrepair due to not being maintained.
rancid warren
Yeah, I've been there. I save before wall replacement then do nothing while watching it build in case I need to go back.
strange moth
When using the "Replace" function, the light fortification should stay active and not downgrade houses.
viscid tulip
When using the "Replace" function, the light fortification should stay active an...
Well it doesn’t, because that’s exactly how I upgraded my walls.
solar herald
Bummer! I didn't see that option
midnight flax
Well it doesn’t, because that’s exactly how I upgraded my walls.
do you have your walls split into multiple parts by chance?
viscid tulip
I do, as they are really long.
Is that why it doesn’t work when upgrading? If that’s the case it’s odd since multi part walls work when placed.
midnight flax
I suppose?
strange moth
Yep, after some testing, that is the issue.
If your wall is in multiple sections, the fortification is not kept when replacing.
Will look into fixing that.