When applying sprayed mortar, where is the best place to position the lath?

Hello, everyone.

This is Enta.

Where is the lath mesh used for sprayed mortar or sprayed concrete located?

Spray Thickness

To be honest, I've always felt there was a contradiction there, lol.

 

Well, these days, I just think, “Ah-ha! This is probably it,” and then figure it doesn’t really matter lol

 

When you're spraying, do you lift the lath mesh up? lol

Or are you using spacers to raise it?

 

Well, while the spacer is meant to serve as a guide for the spray thickness, I seem to recall that in the past, its primary purpose was to keep the lath mesh centered.

And yet, the construction plan specifies that the wire mesh must be firmly attached to the natural ground and stretched so that it fits snugly.

This phrase sounds so familiar, but it’s actually kind of tricky, isn’t it? lol

 

I asked the AI.

Nuances of meaning:

  • It feels natural

  • Blends naturally into its surroundings

  • A feeling that makes you feel at home right away

  • Harmonious and pleasant

Shingle Installer

If anything, the natural terrain gives it a nice, laid-back vibe, but if we don't pull up the net, the inspector might...!?

Back in the day, the inspectors used to go on and on about the nets, lol.

 

Because of that, back in the day, we used to bend the tip of a 500-mm-long spray wand and spray while raising the net, didn't we?

To be honest, I’d say it’s fine to do it, but it’s also fine not to.

Since we're using spacers to control the thickness, it'll only go up a little bit, lol.

 

To begin with, since it’s hard to tell which mesh is attached to the natural ground when drawing the plans, I’m simply drawing the wire mesh in the center of the sprayed concrete cross-section.

The theory is that, since it’s drawn in the center of the blueprint without anyone noticing, the rebar mesh goes in the center.

 

From a macro perspective, in terms of strength, the surface would be stronger if it were as close as possible to a sprayed surface; however, since we aren’t seeking strength from the lath mesh, it’s unclear how this actually plays out.

Also, since the mesh adheres better to the mortar when it’s floating, it’s definitely better to have it positioned higher up for that reason as well.

 

However, it doesn't have to be there, and even if it happens to be underneath when you dig an access hole, that's not a problem either.

There is no literature or anything else that states it should be in the middle.

Besides, there aren't even any strength specifications, lol

Last Layer Completed

I think it’s best to view the wire mesh simply as a means of improving the bond between the natural rock and the mortar.

Think of it simply as a way to ensure the mortar adheres firmly to the surface, like roots intertwining.

It seems to me that no one can really articulate a logical opinion on this matter—what do you think?

 

See you later.

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