after the dormers are fit there wont be much roof left

, poss 6 rows at the bottom and the same at the top , as the dormers are to be full width , its supporting the dormers that bothers me ? what do the sit on ? my house id built with breeze block , is this strong enough to support shit on ??
this is realy cool !!!
cheers for the help !! sorting my building probs on a car forum !!!