Help with my bid documents
We're doing a room addition onto our small house. I figured out the layout (thanks for the input from here!), and had a draftsperson make formal drawings. We're going to hire out the concrete work and the framing shell, and we'll DIY install siding and finish out the interior.
My question is what do I need to include in bid documents to make sure I've got the proper things specified. The only other time I've bid something out, I had a much more comprehensive set of plans, so the plans were sufficient to solicit bids.
My goal is to have it complete enough that subs can bid accurately and that there will be no question about design and materials.
Here are the drawings I've got:
Some of the details on my list:
Footings to code requirements
Crawlspace floor: 2Ã¢ÂÂ thick concrete. Roughly even with existing grade.
Floor joists 2x10, 16Ã¢ÂÂ OC, parallel to existing house.
Plywood t&g subfloor, even with existing kitchen subfloor, glued and screwed
Wall framing 2x4, 16Ã¢ÂÂ OC
Ceiling height 8Ã¢ÂÂ-6Ã¢ÂÂ
Exterior sheathing of ???
Windows and doors supplied by owner
Windows properly flashed to sheathing, room wrapped in Tyvek
Roof stick-framed with ?? Hardware, 8/12 pitch (field verify)
Roof sheathing of ???
Roofing: underlayment of ??, will specify shingles
I'd appreciate input on items above: what do I specify for the ?? items, what should I change, what have I omitted?
Also, I'm debating whether to buy the building materials ourselves or have them do it and then double check them.
Thanks for any and all input.