Originally posted by ShaftAlmighty:

Seriously, i cannot, for the life of me, figure out roofing! With the exception of 7x7 huts and small silos, i just cannot learn how to roof various types of buildings. As i type this i'm getting the idea of building in tiers like a russian nesting doll framework.

Don't even bother posting links(for me at least) because my proto-simian quasi-lizard walnut brain cannot even begin to fathom what would be going on on-screen. I'm talking words, literal typed bits of advice. Bullet points even.

1. Structures, once placed, have a coloring based on how structurally sound they are. grey-blue means its the strongest and the equivalent(To be explained more later) to being in/on the ground. Red indicates that it will be demolished either at the time of placement or moments there after.

3. With point 2 in consideration, you need to support structures as they get higher or if you're building over a cliff etc etc. Horizontal beams, vertical ones, angled ones etc help. However some structures even then can have issues to be placed due to what/how placed.

4. Reinforced iron beams are the strongest support and can act in many cases as a "foundational grey-blue piece" for the next piece placed. However, keep in mind that reinforced iron beams also start to march towards red the farther out they're placed (up or down) from their initial support.

5. Stone cannot be placed as a roof unless supported by the reinfornced iron beams or in limited situations of being very close to the walls of a structure(this is harder to explain but clipping pieces into a wall and having them connect between walls works for small towers etc.

6. Connecting structures to trees means the first placed piece is grey-blue. Rules concerning stone mentioned above though still apply from point 5.

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So if you're planning a pagoda style structure, not using iron or stone and only basic wood pieces(including core poles) structure in the middle first to build a tall frame and then poles to plan out each "tier" after that then horizontal beams to flesh out the skeleton of the structure to then build your walls and roofing on each level from there.

Really without knowing your exact design wants, its hard to better explain how to place roof tiles as you wish. Wood floors can "roof" a structure but if you dont want decay, you just need to extend the roof from the tier above it so that it covers over those floor tiles.