...for the estimate? I have a blank Form 515 Sumary of Estimate with the itemized reverse. Is this adequate for home remodelling or renovation? Or should I use some other form for getting a contractor's estimate on the work and materials? Please advise me.
The work is quite extensive. It includes roofing, flooring, and many things inbetween.

Your contractor should have the estimate sheet. On a job this extensive I hope that you are using a licensed, bonded company. If they are a good company they should have this area covered. You just need to ask them for it. Hope this helps. Good luck on the project. I love remodeling!