Merge branch 'master' of https://github.com/Citadel-Station-13/Citadel-Station-13 into Ghommie-cit490

code/game/objects/structures/lattice.dm

@@ -60,7 +60,7 @@
 		to_chat(user, "<span class='notice'>You build a floor.</span>")
 		var/turf/T = src.loc
 		if(isspaceturf(T))
-			T.PlaceOnTop(/turf/open/floor/plating)
+			T.PlaceOnTop(/turf/open/floor/plating, flags = CHANGETURF_INHERIT_AIR)
 			qdel(src)
 			return TRUE
 	return FALSE

code/game/objects/structures/stairs.dm

@@ -102,13 +102,13 @@
 /obj/structure/stairs/proc/force_open_above()
 	var/turf/open/openspace/T = get_step_multiz(get_turf(src), UP)
 	if(T && !istype(T))
-		T.ChangeTurf(/turf/open/openspace)
+		T.ChangeTurf(/turf/open/openspace, flags = CHANGETURF_INHERIT_AIR)
 
 /obj/structure/stairs/proc/on_multiz_new(turf/source, dir)
 	if(dir == UP)
 		var/turf/open/openspace/T = get_step_multiz(get_turf(src), UP)
 		if(T && !istype(T))
-			T.ChangeTurf(/turf/open/openspace)
+			T.ChangeTurf(/turf/open/openspace, flags = CHANGETURF_INHERIT_AIR)
 
 /obj/structure/stairs/intercept_zImpact(atom/movable/AM, levels = 1)
 	. = ..()