I have just installed hardibacker for a tile floor on the second floor of my house. One of the seams has a about 1/16" - 1/8" difference in height from the board next to it. What is the best way to level that off? Can I just apply a couple of layers of mortar to even out the height discrepancy? Also, how far apart should the backerboard screws go in? Near the seams, I installed a screw about every 4 inches. In the middle of the boards, I justed the 8" designated on the board itself.
Thanks for your input!
2007-09-22 10:34:42 · 4 answers · asked by JP 1 in Home & Garden ➔ Do It Yourself (DIY)
Big time overkill with the 4" screw separation but more does not hurt here! Just wait till someone will be removing it some years down the road :) they may hate you for this. I am also concerned with the reason for the difference in hight. It is not that of a big deal you can eat the difference on two tiles and no one will know . Still, what caused that . Did you try wacking the board with a hammer to see if it will drop into place? Is is possible you left something underneath, like a piece of hardibacker? Anyhow, your idea of using more mortar and sloping it is good, not great but will do.
Good Luck
2007-09-24 20:34:49 · answer #1 · answered by Derek 4 · 0⤊ 0⤋
No offense but if I was doing the job; before I went any farther I'd want to know WHY the difference? If the two butt together on the same rafter/beam, then something is wrong at the beam or the concrete backer board varies in thickness.
The screws need not be any deeper than flush, or just below the surface.
Certainly you should skim thinset to cover the seams anyway, but 1/8 inch to fill and feather is like analogizing walking on a railroad track with one foot always on the track and the other foot always touching the ground.
4 inches is a bit of overkill but it won't hurt.
I'd definitely HAVE TO KNOW why the difference in height.
Steven Wolf
maybe I'm not picturing this properly but is the higher piece flush on other corners and seams with adjacent pieces? I might even Shim the lower piece?
2007-09-22 10:46:32 · answer #2 · answered by DIY Doc 7 · 0⤊ 1⤋
sounds to me like you are doing a pretty good job......we just use thinset if we have a small difference in the boards and a 1/16 of an inch is pretty small so just take a flat trowel and slope it off..........as far as the screws your right on the money.....seams always need to be screwed or nailed closer than the rest of the board so I think your doing just fine....IMHO.............................
2007-09-22 15:31:09 · answer #3 · answered by don_vvvvito 6 · 0⤊ 0⤋
1/4 by 1/4 notch should be ok for both
2016-05-21 01:20:05 · answer #4 · answered by Anonymous · 0⤊ 0⤋