I have a customer inquiring about an ICF roof on a modern design two story with parapet walls around a rooftop deck. About 900 sf with 19' span. I have a couple questions. What is the L&M cost of a wood roof structure, parallel roof trusses, sheathing and insulation? What about ICF? Special considerations? Shoring of 2nd story floor?

Easiest to just quote it out yourself. Call a truss place or go to a lumber yard for trusses. Then just price out the rest.

Sorry I really don't think anyone can answer that but to get quotes.

I agree with newboston. The icf roof can also be quoted from the manufacture as far as a standard cost. My question is, why the parapet?. Much simpler and cleaner style without it.

I came up with $15 per sf wood structure. $24 per sf ICF, rough numbers. As far as the parapet walls, I don't get a say.