RickSab Posted April 11, 2016 Report Share Posted April 11, 2016 I came across a type of sub flooring I am unfamiliar with. It's a mortar type material, about 1 to 1.5 inches thick. Based on what can be seen in the basement it is over a wood subfloor and wood joists. Linoleum was laid right over this material. I suspect it might be a fireproofing or sound proofing material. The problem is is has cracked and the floors are uneven. This is a four unit multi family built around 1942. Click to Enlarge 43.06 KB Link to comment Share on other sites More sharing options...
Marc Posted April 11, 2016 Report Share Posted April 11, 2016 We've done a few structural floors that had a couple inches of fiber-reinforced concrete over 1/2 inch decking instead of just regular 3/4 decking. It was said to produce a very quiet floor. This was the mid-80's though. Marc Link to comment Share on other sites More sharing options...
John Kogel Posted April 11, 2016 Report Share Posted April 11, 2016 Or it could be leveling compound spread over the uneven wood subfloor in an attempt to level it. Could have been done any time, but in the last 20 or 30 years. Link to comment Share on other sites More sharing options...
Jim Katen Posted April 11, 2016 Report Share Posted April 11, 2016 Gypcrete. It's used all the time in multifamily construction. It's generally pumped in and is self-leveling. If it's not mixed properly it can crack and crumble. You can replace the crumbling sections very easily. Link to comment Share on other sites More sharing options...
RickSab Posted April 11, 2016 Author Report Share Posted April 11, 2016 Thanks, I considered a leveling compound but the thickness was puzzling. It was the same level ah the plywood in the hall. You guys have all been very helpful. Thats why this board is the best. Link to comment Share on other sites More sharing options...
duomit Posted February 1, 2019 Report Share Posted February 1, 2019 Looks like cementitious self-leveler. How old is the floor? Why patch in hardwood? Link to comment Share on other sites More sharing options...
Rob Amaral Posted February 2, 2019 Report Share Posted February 2, 2019 Hmm... 1942? Military base housing perhaps?? (I don't find buildings built in 1942 around Boston... though a few near the coast may have been)... I'd suggest they make sure the cementitious composite was tested for asbestos-content just to be sure... Exactly where was this property? 1 Link to comment Share on other sites More sharing options...
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