hi josie
yeah i think somerfield has allowed for cat 2 tiles. i am not sure what category porterdavis would have them at but they are the Slimline Roof tiles from Boral. but in saying that i still haven't recieved approval, so my builder could be spinning shishkebabs... but they reckon they went to the source and found this out. as you said i have also noticed the lesser category tiles on homes as well.