Will Villagers occupy houses with half-slab roofs?

Question

I built some houses for a village with elegant pitched roofs made out of half-slabs. The villagers I put there (with eggs) refused to stay, and moved elsewhere pretty quickly. Is this due to the roofs, or is there some other factor?

Answer 1

The roof shouldn't affect it. Look at the blocks in a 5-meter square around the door. If the light levels are equal, it won't register as a house. Also, make sure you're using a wood door, iron doors don't register as valid.