3 plex flat roof property has leaks on the inside, had a few roofers looked at it.the scope of work involves:1.Existing roof has many years of patching and patching and needs replacement, considering a tapered insulation system to give a bit of slope for rain runoff.2.Many of the joists are rotted on their ends due to moisture damages and neglect, so a significant number of those need to be repaired by sistering a longer piece to tie it back tobwhere the members are solid.3.Some plywood decks if rotted may need replacement, no telling now many until roofing membranes are torn off.4.All wood fascia are to be replaced due to rot.5.Repaint new fascia.Am I correct that I should request two invoices two "jobs", item 1 is new roof to be depreciated, item 2-5 are repairs that may be expended one time?

Caulk the wall; cement the wall; or dig the outer foundation, seal it with a membrane, tar it, then fill back in the dirt?

Many of the fibers will become trapped in the mucous membranes of the nose and throat where they can then be removed, but some may pass deep into the lungs, or, if swallowed, into the digestive tract.Asbestos is hazardous when it is friable.

The new roof membrane may be watertight but how is it detailed where the roofing meets the parapet wall?  

I then use cement board on the walls and over top go with a waterproof membrane.

Use a good/thick MEMBRANE material. 

You want PEI 5 impervious porcelain tile, and larger tiles with minimal grout lines are better than smaller tiles with more grout lines.You should make sure the concrete is clean and then give it two coats of a paintable waterproofing membrane.

So if you need an extra bundle or so, you can go there instead of trekking to a supplier to get it.True, type/brand of "underlayment" doesn't matter so much, like ice/water or a good membrane to put in the valleys (over the valley metal), and if they are doing the Ice/Water around the perimeters, THEN it may matter for a good one.Flashings?

I have used a sawzall in the past to cut between the 1X fascia and sub-fascia to slice through the nails to extract it, but I have seen "pros" make a mess of it by hacking the 1X into pieces and used a pry bar to brute force it, which usually end up disturbing the drip edge or even the waterproofing membrane above it.

So that old slate may be in good shape, but ... at some points "most" of those roofs (not all) require you to remove the tiles, prep, install new underlayment or water barrier membrane, then re-install the tiles.