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Sub-floor cut between floor joist and cast iron bathtub.

Sub-floor cut between floor joist and cast iron bathtub.


  #1  
Old 05-05-14, 11:52 AM
J
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Sub-floor cut between floor joist and cast iron bathtub.

Hello DIY Forum!

A plumber tells me I am going to have to bust up and remove a cast iron bath tub, replace a plywood sub-floor that has been cut, then replace with a fiberglass bath tub.

Someone cut the sub-floor on the wrong side of a floor joist [see picture]. Now the bath tub has no support.

I am wanting to try and put scabs behind the floor joist to give the subfloor support.

It's worth a try. If I fail then I can have the bath tub replaced.

The pictures are self-explanatory. In the first picture you can see where the plywood sub-floor has been cut.

The second image is a sketch of the proposed repairs.

The picture at the bottom describes what I have planned.

Will the proposed repairs work?

I would appreciate any suggestions.

Thanks.
 
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  #2  
Old 05-05-14, 03:51 PM
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Much easier to access from the crawl space underneath or remove a portion of the ceiling in the room below. Also, if you have access to the rough-in area of the plumbing behind the drain side of the tub, get in with a flashlight and see if the whole tub is setting on individual feet or if the entire is supported with a mortar bed. I don't think that your plan will offer any strength to the repair other than tax you good intentions with a lot of frustration.

Was the error caused by a professional? if so, they should repair for you at their expense.

Word to the wise, always do a test cut and measure to the nearest joist and then make the final cut. Never completely trust the nails in your floor are centered on the joists. Lots of them miss the mark. You can also drive in a series of nails or screw until you find the inner and outer limits of the floor joists.
 
  #3  
Old 05-12-14, 02:58 PM
J
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czizzi;

Thanks for responding to my post.

It's all a moot point. I have decided to have a plumber remove the tub. After removing I am going to replace the subfloor and the finish floor then install a new fiberglass shower.

Thanks again.
 
 

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