Is it roofs, or rooves?

Question

For the sentence "water collected on the rooves of the two units", is it rooves or roofs, possibly even roof's. The more i see the word roof, the less it looks like a word..............................................................................................

Also any reasoning or proof in your answer would be helpful, i like to understand why things are the way they are.
So show any proofs you have, or prooves. Or a proof which prooves your prooves are prooven..

I want to know the etymological reason as to why the answer of this question is as it is. Plus its more fun to ask people on here instead of just looking in a dictionary

By the way, there is a big difference between a house and a unit there lass

Answer 1

It is roofs not rooves .
Why ?
Because if the word ends with a consonant which is preceded by a vowel then you keep it as it is and just add the (s) to form the plural .
And if the word ends with a consonant which is preceded by another consonant then you cross the last letter and add (ves) .
e.g. wolf : wolves (plural) .

Answer 2

Rooves

Answer 3

Roofs is the plural of roof in all varieties of English. Rooves is an old secondary form, and it still appears occasionally by analogy with other irregular plurals such as hooves, but it is not common enough to be considered standard........so technically both are right!!

Answer 4

You should get a dictionary, if help, then you can look at the roofs and rooves to your hearts content. matter of fact i am note even sure the word exists

Answer 5

roofs

Answer 6

roofs

Answer 7

roofs

Answer 8

roofs

Answer 9

roofs

Answer 10

A roof oh and they mean a house by unit you are so S-M-R-T