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tpagel 12-15-2009 11:16 AM

bathtub reinforcement needed?
new second floor bathtub in a 1950's house. Floor joists in that area span about 10 feet and are 2x8 @ 12"-14" O.C. Want to install a modern 5'-5" fibergalss jacuzzi-type tub. Is present framing sufficient for that kind of load? Thanks in advance.

Bob Mariani 12-15-2009 12:30 PM

you should be fine

tpagel 12-15-2009 12:33 PM

Thanks, Bob!

That is really the answer I was hoping for! Did not relish the idea of ripping up subfloor to sister in joists above finished first floor space!

Michael Thomas 12-15-2009 12:56 PM

If you intend to install ceramic tile, and can do so without creating too many problems with floor level transitions, you might want to consider adding an additional layer of glued and screwed sub flooring to further stiffen the floor.

tpagel 12-15-2009 01:55 PM

Great idea, Michael. What thickness? 1/2" or 3/4"?

Bob Mariani 12-16-2009 03:39 PM

you will want a total of 1 1/8" to 1 1/4" for a tiled floor. You need to check what you have there now. Normally another 1/2" is fine.

Michael Thomas 12-16-2009 06:30 PM

Also, to the extent possible lay it perpendicular the existing flooring, and with staggerd ends, and with seams not aligned with seams below.

Also, if it works in terms of height, 3/4" or even 5/8" is considerably stiffer than 1/2"

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