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I dug up a trench to replace my old cast iron sewer line and the old galvanize water line is next to it just a little higher. I am going to replace that as well since concrete will be poured and it will be more costly to replace that in the future. There are different opinion regarding the type of pipe or tubing to be replace, PEX, flexible copper, cpcv and hdpe (black poly pipe). I was recommended HDPE but none of my area plumbing store carries the black poly pipe, home depot have it only available to ship. I see that Grainger carry it. Does any one know if Northern CA allow black poly pipe to be install as a service line. One like this Link Link

Thanks you everyone for helping out, with today economic state we just afford to hire a contractor for this remodeling task being handy around the house I just have to do a lots of reading, ask questions and do my best I haven't got a chance to go down to the sub floor to measure how far apart are the griders as of yet, too bz tearing down all the sheet rock, no insulation on any of the walls there are very fine one on the ceiling though. I understand the differences between floor joists and subfloors, just haven't seen one that did it with 2x6 vs plywood. Talking about plywood, there aren't any on the exterior wall either, doesn't looks like it required in the 60's. Going back to the insulation and vapor barrier for the bathroom, if I were to use unfaced insulation with vapor barrier then the material for the vapor barrier would be Certainteed MemBrain. Looks like at this point I will be installing faced insulation for all exterior walls and unfaced for interior walls. As for the bathroom floor, I'll just install cement board and tile over it. I'll post some pictures once insulation is completed. Thanks Tony

We just bought this house that was build in the 60's, pretty much rip it down to the studs since there was no insulation in the wall and a lot of items that needed to be updated. We will start with the bathroom remodeling first. I'll be installing non faced insulation in all the wall of the bathroom followed by a vapor barrier, the bathroom wall is going to be 3 pieces of cultural marble (Marblestone). I'll be using durock or similar product (doesn't look like home depot or lowes carry durock) for area where the shower walls and 5/8" green sheetrock for everywhere else My question is do I insulate all the wall down the wall around the tub or just to the lip of the tub only? As for the ceiling, do I install faced or non faced insulation? One more question that does not related to insulation, is the bathroom's sub floor, right now it's 2x6, should I add a layer of plywood before putting down a layer of cement board for tile on the floor area? Thanks Click to Enlarge 42.01 KB Click to Enlarge 36.17 KB Click to Enlarge 36.24 KB