Hi,
im a sketchup beginner and i started my journey with house modeling. For now its all nice and simple, but i dont know if i should use grouping for all separate floors and roof for future presentation or should i do all as one unit and use sections for it. Till now i dont like how sections cut my walls, and all inner wall empty spaces is shown.I dont mind to use grouping 
but it doubles some edges on my model and dont know if it can mess with texturing and rendering.
All suggestions are welcome!
Roger