I am having a concrete slab poured under my raised house. What is better, 4" concrete with fiber in it without rebar or 4" concrete with rebar? The house is on the Texas gulf coast.

Hi, mark442!

Greetings and WELCOME to the site! I just made some minor adjustments to your question and moved your question that you had posted in Introductions to this forum topic area so that it will get the most exposure to those who are best able to answer it. Introductions is for people to introduce themselves and we try to not ask questions there.

It can be a little confusing when first learning how to use this site! Your question will get noticed much more in this forum topic area.

We would appreciate it if you would return to Introductions sometime to tell us a little about yourself though, if you would be willing to do that.

Thanks!

Good Job Clough!! Thank You for the kindness!

The salesmen say the fiber in Crete ( which I hate pouring and troweling) Is as good as rebar on flat ground. I disagree but it's a big step up from nothing. The difference ARE
1. Rebar is one dimensional reinforcement
2. Fiber is all dimensional

There are limits to fiber is suspension simply because compression is lost not sitting on the ground. There is where the Rebar comes in to replace the compression factor missing. Example: cantilever concrete decks on High rises.

I'm an old Crete and I prefer rebar. Now here there kicker on that. TOO many creters don't use "tables" to set the rebar IN the Crete. Can't tell you how many 1,000 of tons of concrete I"ve ripped out and the wire or rebar was all but under the Crete.

Heres the response you will get there from a Crete contractor. " Oh we use brick to lift the rebar and pull them out as we place. That can work ONLY if you don't step on the rebar as you keep pouring and sink the rebar. "Tables" is the only way to guarantee that the bar is at the right depth.