Old Bath Remodel

supercrew

okay i suck at ASKING questions.....
i have a remod....old....ripped up the flooring...old school....never seen it before....they cut the top of the floor/ceiling joist to a point....overlayed barbed wire over it to hold concrete.......then put thier ceramic on the created slab. PLUS they cut the little 2x8 floor/ceiling joist to run drains and water thru.....(guessin the hole saw wasnt available then)

to my dilima....

do i run an additional board along the top of the point to nail my subfloor too??? ????

i already know i gotta install metal gussets where the joist are cut....

i really hope my question askin abillities have improved.... any help would be well.....help......

alter_ego

? Pics would be good. Got any?

MattCoops

sounds like an old mud job over lath

can you screw cement backerboard over sub and then tile?

__________________
Matt with Cupan Custom Tile & Paint of Lowell, Massachusetts
Design and installation of ceramic tile and natural stone for floor, wall, and countertops
(978) 601-8774 | cupantile@gmail.com | view tile pictures and more

TonyD

I'm lost? PICS?

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"...You cannot strengthen the weak by weakening the strong..."
Abraham Lincoln

Double-A

This is common in this area. Blocking would be added down the joists, a few inches from the top, inbetween all the joists in the room. The flat top of the joinsts were beveled on each side so that they form a 'roof peak' instead of a flat.

A mud base is then set between the joists and sloped toward the doors, so the floor level there remains close to the same.

The reason the joists are cut back is to reduce the area the mud rests on the joists to keep it as strong as possible.

I made this in a hurry, hope it helps explain what he has.

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"My clients’ wishes are the center of my attention." -- David Guido, a contractor in Woodstock, N.Y.
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MattCoops

Sketchup Rules!
nice one Double-A

__________________
Matt with Cupan Custom Tile & Paint of Lowell, Massachusetts
Design and installation of ceramic tile and natural stone for floor, wall, and countertops
(978) 601-8774 | cupantile@gmail.com | view tile pictures and more

karma_carpentry

Yeah, I want to see a pic of this. Barbed wire ? Did you really mean barbed wire ? Not metal lathe?

I've seen lathe / cement / tiled walls but flooring ? I would think the cement layer must be pretty thick to be adequate support for a floor, at least 1-1/2" min.

MattCoops

it must be a prison floor if they used barbed wire

__________________
Matt with Cupan Custom Tile & Paint of Lowell, Massachusetts
Design and installation of ceramic tile and natural stone for floor, wall, and countertops
(978) 601-8774 | cupantile@gmail.com | view tile pictures and more

Brushslingers

Lathe floors were very common in the 60's and earlier... and ya, most are about 1 1/2 or more thick. Barbed wire? Ehhh...

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Benn

jiman3

I would demo floor and plumbing to be replaced then sister the joists, leveling across tops. Then install new plumbing and subfloor.

WNYcarpenter

I must be an idiot...a sharper point increases point load, the picture confuses me even more, what's the subtrate doing between the joists, below the joists? Am I crazy??? I'm completely lost here.....barbed wire? Wire mesh?

WNYcarpenter

I think I might understand...the joists are blocked solid a couple inches below the surface of the rough framing....the joistst are tapered so the adjoining cavities that are filled can be more cohesive, or not seperated as much at the surface by the "2" " joists . Before the developement of cement underlayment this was the process used to assure a ceramic surface planes out with other applied surfaces, such as hardwood and had enough structural integrity to resist cracks.?

Is this it or am I CFU?