Sims 4 how to place roofs on houses

[Dian1947]

I bought the Sims 4 through Origin and when I build a house it took me awhile to figure out how but I was able to build however I don't know how to place roofs on Sims 4 houses that it looks normal like a regular roof like in the sims 2 and 3 games.  Please help me.  Thank you

[Bluebellflora]

@Dian1947

Did you manage to work this out? There's a great guide here - http://www.carls-sims-4-guide.com/tutorials/building/roofs.php