05:53AM | 08/27/02
Member Since: 06/22/02
4 lifetime posts
We have osb particle board subfloor, w/ a 3/8ths inch plywood underlayment underneath ceramic tile. Our grout is cracking everywhere, and tiles are loosening. The underlayment was stapled to the particle board subfloor. I know this was improper. We were also told that tile should never be put over osb-is this true. To have it repaired do we need to take up the tile, undrlayment AND the osb?


07:33AM | 08/29/02
Member Since: 08/19/02
29 lifetime posts
Here's the link to an excellent article on OSB vs. plywood:

While it addresses the problems with tile on OSB (OSB swells and cracks the grout), it may not tell you conclusively if you need to replace the OSB.

I'd say you'll have to get rid of one or the other.


07:39PM | 10/02/02
Member Since: 10/01/02
5 lifetime posts
Sorry to say pal, but the flooring has to go. OSB is not a flooring material as it does not have the same properties as plywood. OSB is a weak wood as it expands more and holds moisture more that plywood. You will need to remove the entire floor with acception to the original 5/8 plywood (assuming that it is still ok). Also, if you plan to replace the flooring with new tiles, ensure that your subfloor is minimal 1 1/8" thick ( some will say 1 1/4"), so an additional sheet or 1/2 plywood on your already existing 5/8. Remember to stagger the joints of the 2 sheets to give better strength and use lots of screws......not staples....seriously....Tons OF Screws...
I hope this helps.
P.S. The number one rule to installing tiles are to have a very strong and sound subfloor.
Click to reply button
Inspiration banner


Post a reply as Anonymous

Photo must be in JPG, GIF or PNG format and less than 5MB.

Reply choose button


Post new button or Login button

To test the boundaries of small-footprint living, interior designer Jessica Helgerson moved her family to a 540-square-foo... Filling an underutilized area beneath the stairs is a smart way to save space. Doing so with a stash of wood, however, is ... The Audubon Society inspired wallpaper in this Adirondack-styled mudroom will get you in the outdoor mood. Grab your coat ... Chalkboard paint opens up endless possibilities for customizing your dresser time and time again. Use chalk to label the c... A fireplace in the bathroom creates the ultimate setting for relaxation. Homeowners often choose electric or gas over wood... This roomy boot tray made from punched metal stands up to all the elements. Station it in your mudroom or at your back doo... There’s nothing like a new set of cabinet hardware to refresh a room. The possibilities are endless: Go modern, rustic, or... FLOR tiles are an affordable way to customize a carpeted floor covering for any space. Make anything from runners to wall-... Chalkboard paint features prominently in this elegant yet unpretentious headboard design. Add a new message daily to reflec... Salvaged boards in varying widths and colors make up the dramatic accent wall in this attic space. The high-gloss white of... The indecisive homeowner need not fret over choosing one (or even two) cabinet colors. The kitchen cabinets in this artist... Incorporate nature into your lighting scheme by securing a dead tree in a concrete mold and draping your pendant lamp from... Simple and striking, a couple of pieces of "lovingly used" furniture creates a special kind of charm. A weathered chair fo... First dress up your metal shelves with a coat of paint in an accent color that complements your kitchen decor. Then arrang... Dark wood shelving and a matching upholstered bench keep this closet sleek and refined. The large window brightens the sub...
Follow banner a
Newsletter icon Flipboard glossy Facebook Twitter Pinterest Youtube Rss icon