Colonists will be able to remove overhead mountain.
Rimworld take down roof.
How to remove thick roofs overhead mountain use the regular remove roof area option found in the architect zone area menu to draw an orange area above the roof you want to remove.
Enclosed areas will automatically prompt colonists to build a roof unless you apply a no roof region or if the structure is too large over 300 cells.
Rock roof mod is a simple mod just to patch core.
Leave some walls from the edge and take away it gently so that the colonist is not filled up.
You have to leave the walls to prevent the roof fall.
Structures leave ash on the ground when burnt.
Colonists can build structures of a various materials each with different beauty flammability and hit points.
I used the no roof zone and made sure that my worker where in the right area and not busy but it was impossible to get them to remove the roof i had to use a mod to make the workers remove it.
In some places you can not remove the thick roof.
You can only give it to fall.
Designating such an area will also remove existing thin roofs and thin rock roofs when applied but thick rock roofs will remain intact.