Adding toilet and shower advice

My house is one level with attic and crawl space, it has one bathroom only, but, my master bedroom has a "room" that has a sink, and a door that also lead to the bathroom. My plan is to convert this sink room to a full bath room. the existing sink and cabinet is rather large and I could see a small vanity, toilet, and stand up shower can be added to this room making a 2nd bathroom.
The question I have is of course the plumbing, can the supply all tap off the faucet of the sink even for the shower?
A fan and vent needs to be added, can it go up the attic and tee into the existing bath's vent? The 2 fans of the new and old bathroom would only be about 5-6' apart. That way I do not have to cut up the roof.
I need some advice for the draining, I assume the sink right now drains to some main line under the house. Would the toilet and shower be all using the same drain?
Would I need to replace the drywall with concrete board?
Is there anything else I didn't think of?? any advice is appreciated.
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jj3000 wrote:

It's not recommended/allowed, but it's possible to run both fans out one vent.
The Hot/Cold supply are the least of your worries. The drainage may be the biggest issue. There are some quite complex problems to be looked at which need professional help. Have a plumbing contractor look at the situation and advise you of costs. In fact, maybe do this first so you can see if the budget will allow the project.
I would also make a detailed scale drawing of the room and proposed layout and take it to the town building dep't to see if it will meet code requirements.
Jim
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Speedy Jim gives once again good advice. I would like to second his suggestion to do careful planning. I happen to be in the process of doing that very thing for a couple. The amount of space a fixture takes up and the amount of space needed to use it comfortably are large. Don't forget things like towel bars, paper holders, and the like. TB
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I can tell from the way you worded the questions that you are inexperienced in plumbing.
The biggest issue you face is drain lines and vents for those drain lines. The toilet needs a 3" pipe and you may or may not be able to tap into the existing sewer and have it work. If you can drain the toilet, the shower and sink can tie into the same line.
Your best bet would be to get a few estimates and see what some pros say.
Colbyt
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jeremy snipped-for-privacy@my-deja.com (jj3000) wrote on 25 Jan 2005:

Around the tub or for the walls of the shower, absolutely, unless you're going to float a mortar bed for the tile. Everything else should be greenboard, but you can probably get away with regular drywall if you paint with a quality gloss or semigloss paint.

Electrical. Your bath will need its own circuit, and maybe two, to meet code. Thinking about a whirlpool tub?
As the others have said, you really need to have a plumber advise you on this. Depending on your family's tolerance for having your master bedroom torn up for a long time, I'd think about having a professional bath remodeler do the work since this will be your first time doing something like this.
--
Doug Boulter

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