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.


Post a reply as Anonymous

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


type the code from the image


Post_new_button or Login_button

For an eclectic table setting or outdoor lighting, try a riff on this project from The SITS Girls blog—converting mason ja... It turns out that many bath and kitchen cleansers contain chemicals that are dangerous to the skin and eyes, and often pro... So often we paint tiny nooks white to make them appear larger, but opting for a dark, dramatic wall color like this one—Be... Chocolate-colored walls and large window frames allow the exposed wood beams to take center stage in this small screened p... If you're not crazy about the idea of commingling plants and pool, this modern variation may be more to your liking. The s... Yes, a freestanding garage can become its own tiny house. Artist Michelle de la Vega has all the comforts of a modern resi... There’s nothing like a new set of cabinet hardware to refresh a room. The possibilities are endless: Go modern, rustic, or... Pursue what's known as the stack effect. To achieve it, open the windows on both the upper and lower floors, and as warm a... Like no other floor type, a checkerboard design works wonders to underscore the retro kitchen theme. Vinyl flooring, ceram... Twine lanterns add pops of crafty—but sophisticated—flair to any outdoor setting. Wrap glue-soaked twine around a balloon ... When securely fastened to a tree or the ceiling of a porch, a pallet and some cushioning make the ideal place to lounge. V... Incorporate nature into your lighting scheme by securing a dead tree in a concrete mold and draping your pendant lamp from... For the cost of a can of exterior paint , you can totally transform your porch. Paint the floor a hue that complements yo... In this urban apartment, a standard-issue patio became a serene and green perch by replacing the typical concrete with gro... If you put the washing machine in the mudroom, you can stop the kids from walking through the house in dirty, grass-staine...
Newsletter_icon Google_plus Facebook Twitter Pinterest Youtube Rss_icon