Building permit questions

[RatLabGuy]

Add a vapor barrier now , its cheap and keeps the floor from sweating later on.

@Chris_Keziah

was waiting for @shawn to point this out

 

[shawn]

Do what this guy says. He's something of an expert.

In my shop I used 4" fiber, and just for shits and giggles I added WWM and a vapor barrier (that was more because mine is conditioned)
You can't go back and add it later so do it now

Monolithic if you intend to stick build on it. Otherwise if you Mexican carport the building no need

Nah, I know some good SEs, though. Vapor barrier is essential. Subgrade prep is next most important (no organics, compacted, stone base), followed by control joint cut time & locations. You'll see 5" slabs sometimes in lieu of 4", but rarely thicker than that unless there's forklift or heavy truck loading, etc. Rebar around the door openings, in the turndowns, etc are good. More than that is a bonus but probably unnecessary, especially if the control joints are done correctly.

 

[awheelterd]

Nah, I know some good SEs, though. Vapor barrier is essential. Subgrade prep is next most important (no organics, compacted, stone base), followed by control joint cut time & locations. You'll see 5" slabs sometimes in lieu of 4", but rarely thicker than that unless there's forklift or heavy truck loading, etc. Rebar around the door openings, in the turndowns, etc are good. More than that is a bonus but probably unnecessary, especially if the control joints are done correctly.

17' squares are what I remember being told for control joints.

 

[shawn]

17' squares are what I remember being told for control joints.

2.5 x slab thickness x 12

 

[Chris_Keziah]

Add a vapor barrier now , its cheap and keeps the floor from sweating later on.

@Chris_Keziah

This, my floor was sweating quite a bit today.

 

[awheelterd]

This, my floor was sweating quite a bit today.

Don't feel bad, all smooth concrete in unconditioned buildings sweat today, vapor barrier or not. Vapor barriered concrete might not have sweated as much, but it was still slick!