I've been refreshing on my icing knowledge with help of the highly recommended reading material by Transport Canada TP10643 When in Doubt... Small and Large Aircraft Critical Surface Contamination Training For Aircrew and Groundcrew and came across the same old issue.
Unfortunately TC doesn't seem to know the difference between a hanger and a hangar either so lets put it in very simple terms (a picture that is):TP10643 p.39 wrote: Hangars
1. The best method of ensuring that an aircraft is clean of contamination is by preventing the contamination from collecting in the first place; that is, park the aircraft in a hanger.
Please be advised that parking an aircraft in a hanger is not an effective method of preventing surface contamination.
Besides that TP10643 contains a lot valuable information for TC exam preparation so everyone that is getting ready for PPAER, CPAER, INRAT, IATRA, SAMRA, SAMRON etc. should maybe give it a quick read before the exam.