Does heat move diagonally?

I just started a new game and my starting biome is pretty much surrounded by hot biomes. In an attempt to slow the heat-up down in one of the areas, I'm trying to cut the hot biome off using abyssalite tiles, but I'm trying to be cost-effective about it. If I have a bunch of abyssalite tiles running diagonally (not connected like a "stair", just touching on the corners ), will that stop the heat?