Replacing kitchen floor on old OSB underlayment
Jake Jakeson
6 years ago
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Comments (11)
geoffrey_b
6 years ago
thatsmuchbetter
6 years agolast modified: 6 years agoRelated Discussions
3/4' hard wood floors on plywood subfllor with OSB underlayment?
Comments (12)Every time I run into PB it comes out and is replaced with 5/8 BC grade plywood underlayment. The 1/2" plywood underneath is a CDX grade with no T&G so that is no good for anything without an underlayment over it. Particle board underlayment is fine underneath carpet because it can breath. It has no holding power for staples or cleats, neither does the CDX sheathing grade plywood subfloor. I've seen many floors installed over PB that are very loose and gapped. That said, I have seen a couple that looked fine. Also once PB gets covered over with felt and a wood floor it can't breathe anymore and it can start to do funny things.... well, not funny :), but nothing it may want to do is good. You would have no mfg. warranties either....See MoreOSB subflooring and glue-down engineered hardwood installation
Comments (0)I am double posting this (from Design Dilemma) because I hope for professional flooring advice and also suggestions from people who've done this. We live in the Pacific Northwest (rainy winters and dry summers). Our house is 13 years old with ¾” OSB subfloors on joists 16” on center. We want to remove the carpeting in the dining room, living room and hallway (above grade) and downstairs hallway (on grade), and replace the carpeting with wood flooring. We also want to keep the height difference between these rooms and the adjoining tiled kitchen to a minimum. Because of this requirement, I am leaning towards 1/2" engineered wood rather than solid 3/4" wood. The new flooring would be professionally installed. Am I correct to say that OSB does not hold nails/staples as well as plywood for nail-down installation, nor does it provide a suitable surface for glue-down engineered wood flooring installation? Would glue-down installation avoid the squeeky-squeeks that might result from a nail-down installation? We have heard that installers recommend having an underlayment put down over the OSB to provide a better adhesive surface for engineered wood flooring and we would have that done. I don't think a floating floor would be an option because of the upstairs room size (50' x 15') and high ceilings (possibly too noisy). For glue-down engineered wood flooring, what underlayment would be best between the OSB subfloor and the engineered wood floor? How thick would it need to be? Thank you Mary...See MoreThey used OSB Roof Sheathing instead of plywood as in contract!
Comments (15)For me, the more important issues are the thickness of the OSB and the wind speeds of the region. If the project is on the coast or another high wind area and the OSB is 5/8" or thicker, I see no practical advantage in replacing it with plywood. Nail pullout in plywood is superior for 1/2" thickness but I don't recommend 1/2" roof sheathing of any kind. To me the primary advantage of plywood is that its edges shrink back to the original thickness after getting wet but that can be dealt with by using Advantech or another treated OSB or covering it before it can get wet which I assume has already happened. I can't think of a reason to glue roof sheathing but perhaps its for wind resistance. If it is glued, I would not attempt to remove it. I'm curious what others think about adding a layer of 1/2" plywood over the OSB. I imagine the hardest part would be marking the nailing pattern but easier than removing the OSB. But I would first want to know the wind condition, sheathing thickness and type of nail used....See MoreInstalling laminate on OSB subfloor that has squeaks and minor warps.
Comments (3)In my experience, the main reason MDF/chipboard/OSB subflooring squeaks is due to internal separation of the product. I have worked on several homes with subflooring listed above and was not able to fix all the squeaks. I used several products designed to insulate/separate the subflooring material from joists, screws designed to be installed through carpet, through the subfloor and into floor joists, and adding fasteners. The only sure fix was to remove the material that squeaked and replace it with plywood....See MoreJake Jakeson
6 years ago
PROJoseph Corlett, LLC
6 years ago
worthy
6 years ago
annied75
6 years ago- PRO
Joseph Corlett, LLC
6 years ago klem1
6 years agoworthy
6 years agolast modified: 6 years agoIn their online literature, Armstrong shows a stack of peel-'n-stick sitting on OSB in the second picture, clearly inferring OSB as an appropriate underlayment.
Clearly confusing!
As Armstrong’s more detailed installation instructions says this:
Source p.50
There are certain OSB panels that are designated specifically for underlayment.
And as referenced here by a flooring professional, some vinyl manufacturers advise against OSB without further treatment and a liquid underlayment on top of the OSB.
I confess, I've only taken the easy route and just used plywood underlayment panels!
thatsmuchbetter
6 years agolast modified: 6 years ago
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