[amakarevic]

i was wondering if it is really necessary to use fiberglass tape in seaming hardibacker panels like my tiling book says. i didn't use it in the example from the picture yet it feels really firm. especially because there will be thinset going over it.

thanks

 

[JazMan]

Installing the special mesh tape is very important, some would say critical. The tape and thin set make the units monolithic. What I see in the picture is 2 sheets of Hardie which will in time crack at the seam, cuz there's nothing holding them together. It's works like your drywall.

Is that the correct fastening pattern? Doesn't look right to me. The screws look about 2" from the edge. BTW, is there thin set under the sheets?

Jaz

 

[amakarevic]

there is thinset under. what should the fastening pattern be? my book says nothing about it.

is it too late now to scrape some hardened thinset from the top of the seam, apply the tape and thinset over it?

i can also remove the thinset between the panels with a diamond blade, if necessary.

 

[JazMan]

The fasteners should be no closer than 3/8" from the edges, but I would not go further than 1" away. So 3/8" to 1" and no fasteners within 2" from the corners. They recommend fasters about 8" apart. I would go a little closer in the field and even closer on the perimeter.

It's not too late to apply the tape. I would do it at the time you install the tiles to prevent making a speed-bump.

Jaz

 

[amakarevic]

thank you, sir. so on the edges of a panel, i will go about 3/4" away from the edge and about 6" apart between each screw. in the middle, i have screws approx. every 6" too, does that sound right?

thanks again

 

[Bud Cline]

Use the seam tape.

 

[Bud Cline]

I was wondering if it is really necessary to use fiberglass tape in seaming hardibacker panels like my tiling book says.

I had to come back and re-read that statement, I thought maybe I had misread it earlier. Seams I did not!

These are the types of comments that cause me to get PM's from Moderators when I respond to them like I normally do.

 

[amakarevic]

is it the same tape as for DW or some special one for hardibacker?

 

[Bud Cline]

is it the same tape as for DW or some special one for hardibacker?

Some special one for hardibacker, and all cement board products?