Raising Floor in Wash Room

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  #1  
Old 06-22-12, 06:13 PM
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Raising Floor in Wash Room

A friend has a house with a unique problem. The house brick walled and elevated about 3' from ground level. The car port is at ground level and has a small (8'x10') storage room at the end that has been converted to a wash room. The ceiling in the wash room is about 11 feet because entire roof is one unit. The wash room is a separate room with an access door and steps into dining room. The washroom/carport floor appears to be a solid cement slab. We want to raise the washroom floor approximately 3' to match rest of house. This wash room has a washer, dryer, and 30 gal water heater along one wall.

Question: can someone tell me what kind of subfloor structure we would need to build? Maybe an on-line guide someplace. We would like to put in a solid floor and tile it to match dining room. Thanks for any info. If need more info just ask.
 
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Old 06-22-12, 08:25 PM
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When you say 'match [the] dining room' do you mean exact match or you just want tile in both rooms? My question is because finding more tile can be a nightmare even a few months later.
 
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Old 06-22-12, 08:39 PM
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We have the extra tile luckily. We just want to build up the floor and then tile it. Probably put in a new door with treshold to cover the joint between the two floors.
 
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Old 06-23-12, 05:00 AM
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You'd want to use 2x8s for the floor joists and with tile you'd want 2 layers of plywood so the floor is good and solid [no flex] You'd also need to allow room for your cement board to keep it all level with the rest of the house. The carpenters will probably chime in later with more/better info for you
 
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Old 06-23-12, 05:50 AM
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Clarification. The doorway has a 3' drop from the dining room to the wash room??? Is this a "carport" or a garage with walls and door? Pictures sure would help. http://www.doityourself.com/forum/el...your-post.html
 
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Old 06-23-12, 07:23 AM
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It's a normal room with walls and main house roof at the end of a carport. The carport slab extends into the room.

I got the joist and subfloor pretty much figured out like you stated. It's the support structure filling that approximate 2 foot gap and supporting the joists I'm wondering about. Don't know if you would just use piers like on a deck or if something else would be required.
 
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Old 06-23-12, 09:31 AM
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I'd use tap cons to secure the rim [?] joist to the brick with a few vertical 2x4s under them for added support. I'd also frame out an access door in case you ever need to work on the plumbing from the bottom side.
 
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Old 07-11-12, 07:56 AM
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splais-

as chandler said, some pictures would provide a clearer image of what you are trying to do. maybe it's just me, but your last comment did not make sense...

also, your profile says yuma, so i presume this project is in arizona? what about insulation to keep the heat out?
 
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Old 07-11-12, 08:05 AM
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Yes, I am in Yuma, but the project is in Mississippi. I will be there next week and can get some pictures then. I don't understand what is so difficult about this. forget about all the if's or but's about the floor and the roof etc. The question is simple at it's base We have a small room (8x10) that we want to raise the floor 3'. the room has a washer, dryer and water heater in it. What kind of support struture is required under the subfloor I would put in to tile over.
 
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