This had the same issue but with sturges when i was trying to complete the sanctuary side quest.
Fo4 repairable sanctuary roof.
Press either or to access the console then enter tcl to toggle collisions.
Building stairs is a good fix.
Enclose the car port and enlarge.
Or use those fundaments there is a pure wooden one and one with concrete.
Most efficient way to repair the roofs in santuary hill is to build around the houses till you are above the roofs and then build a floor ontop of them.
Those fundaments are the only tile akaik that can sink into the ground or in this case into the damaged roof.
Let the roof floor boards extend out beyond the house.
If you don t use patch job there will still be holes in the texture of the roof because that s how the vanilla textures were made.
Here is an option when you fix the roofs in sanctuary.
Saw a let s play video where that worked.
Sanctuary s settlers don t seem to be making much progress on fixing those houses.
If you really want to use one of the surviving houses in sanctuary hills and want to patch up the wrecked roof i ve found a pretty simple way.
Built sometime in the 2070s sanctuary hills was a friendly suburb of concord located on a small island about a mile north of the town and accessible only by a wooden bridge consisting of 14 prefabricated homes.
Sanctuary hills often referred to as sanctuary is a location and possible settlement in the commonwealth in 2287.
This mod allows you to repair sanctuary s houses using the workshop interface restoring their roof and outer walls and cleaning the interior.
It does require using the console though so pc only.
It also fixes an issue where houses might not register as repairable.
If you want a job done right do it yourself.
Build shack walls outside the house enclosing it.