So, is it "roofs" or "rooves" for you? Both in spelling and in pronunciation. Dwarfs or dwarves? Halfs or halves?
Also does the vowel in roof sound closer to the vowel in tooth or the vowel in book or woof woof (depending on how you say woof woof)?
For the phonetically inclined, in the first question, I'm asking if the last fricative is voiced or voiceless, which means "are your vocal cords vibrating?" which is the difference between f and v. For the second question, I'm asking if the vowel is a tense high back rounded vowel (booth, true, woo) or lax high back rounded (book, cook, hook). Tense versus lax here is the degree to which your lips are rounded and just how high and back your tongue is (or how far down and close together formants 1 and 2 are).