Like the roof requires repairing roof needs repairing.
Require doing sth need to be made = require to being done
Require sb.to do STH need sb. To do STH.
In addition, there are:
1.require sth Need something
2.require (that) sb.should do sth The subjunctive mood in which should can be omitted.
3.require sth.of sb. Order/Ask SB. To do STH.