I fear my options may be limited but I wanted to bounce some ideas off the brain trust first.Here is the layout- classic bungalow 1949 home. I’m adding a bath to the second floor. The subfloor was old tongue and groove 1x3(-/+) hardwood that’s been sanded and refinished, the floor joists (and first floor ceiling) are old growth 2x8 16” oc, centered (literally in the middle of the floor space of the bath) on a 2x6 load bearing wall point or dead load to the basement floor. The remainder of the second floor is raised by a new tongue and groove hardwood, nailed in place (read as currently a true 3/4” higher than current bathroom “subfloor”)After working in “engineered track homes” I don’t like to make a finished tile floor of any sort thinner than 1-1/8 to 1-1/2” from joist to finished floor. I have a few height discrepancies on the subfloor, most are less than 1/8” variance but they’re abrupt, removing the existing floor and replacing with say t&g is not an option as there are existing walls dependent on the subfloor in a manner that won’t facilitate remove and replace, additionally a pour over floor leveler will drip through the existing subfloor making it useless. I also plan on using 1/2” hardie vigorously screwed within specs and then a natural stone mosaic over top of that making me roughly the same height as the existing hardwood.My concern is two fold. Am I barking up the wrong tree by only going the less than 3/4 sub (after it was refinished) 1/2” hardie and 1/4” of tile giving me something north of 1-1/4” finished? Secondly and arguably more important, What the hell am I to do about the variances, I usually glue down the hardie to the sub but I’m wondering if I should go more aggressive and use a large format thin set under the hardie, or some other option like a 1/4” laminate, but again I come across the same dipping problems in flooring, it just looks a little nicer.I hope the formatting on this isn’t an atrocity, ask whatever questions you need to help this situation make more sense. Lastly, thanks for reading my incoherent ramblings, I hope 🤞🏽 someone can help! via /r/DIY https://ift.tt/38opxud
