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Not very sandy, I would consider it pretty typical top soil. Compacts pretty well so I’m hoping that once it’s graded nicely I shouldn’t end up with too much water build up in the soil over the insulation.

Thanks for your input. I was kinda thinking the same thing, if I have too much drainage there nothing will grow. Unrelated to my first question but should I have put some 6 or 10 mil poly down on the XPS foam to prevent it from becoming soaked in water?

Most of the images I’ve seen online show the drain pipe and coarse aggregate below the skirt insulation. I am planning on planting a small garden on that side of the garage from the slab out about 2-3 feet. I guess I’m concerned with the soil becoming drenched in that area when the water can’t...

Thanks Kay

I looked online and couldn’t find too many details on types of backfill and/or drainage to put on top of the skirt insulation. Would I have been better off backfilling with river rock or something else that would encourage more drainage?

I have just laid down the skirt insulation around my monolithic slab. Slab is on 3/4 clean which extend out about as far as the skirt insulation does so there should be no issues with water accumulation under the slab and skirt insulation. I have started backfilling on top of the skirt...

Okay so I have laid out the formular 300 in front of the garage entrance starting from the edge of the underslab insulation and it’s extending out and down at about a 15 degree angle. I tried to ensure that the 3/4 clean was as flat as possible before laying the foam. I’ve backfilled about...

I think the portion of the drive over the insulation will be pavers. I assume the same rules apply there

Nobody has any advice on this topic?

For those of you who have done FPSF slabs for your garages, are there any special considerations that need to be taken when putting the insulation around the front of the garage where the driveway meets? Do you still insulate up the side of the slab and still install the skirt insulation out...

Well a few days have passed and my slab was starting to look pretty darn good. Nice uniform shade of light grey with no sign of any crazing to be seen. Until...... We had some rain over night yesterday so when I got home from work today I decided to squeegee the remaining water sitting in the...

I took a series of pictures of the slab throughout the day and it does in fact look as if it is “drying”. The darker areas which showed signs or crazing are slowly turning to a very light grey and the crazing isn’t visible once this happens. The slab is beginning to look more uniform in...

I called the guy who did my concrete and he showed up 30 mins later to have a look. He didn’t seem concerned in the slightest and said that once the slab is dry it will be a uniform shade of light grey and the small surface crazing which is currently visible on the darker grey sections will no...

Never had any issues with water spots on anything else. On city water so don’t have the type of minerals you would get from well water.

Well after letting the slab dry out I have some concerns with what I am seeing. The overall appearance of the slab isn’t very attractive and not at all what I was expecting and more importantly I am seeing quite a bit of crazing on the surface. Let me know what you guys think....

Well, one thing is for sure... There have been several instances in my life where I have ended up making stuff worse after my attempts at making it better. Really hope this isn’t one of those instances!!

Thanks so much everyone for your input. This is my first big undertaking in construction and the costs are certainly not insignificant so I’d like everything to be done right. It’s really great to have a resource like this with so many knowledgeable people. I notice that there are many...

I’ve “earth bagged” the openings for the garage door and man door. Have about an inch of water pooled in the slab which should last a fair bit of time even with the minor leakage. Is it normal that when I run my hand over the wet slab it leaves a slippery feeling film on my hand?

Got home and soaked it down. Going to dam up the door opening and flood it.

What are the consequences of me having let the surface dry out? Have I lost the opportunity to wet cure the surface to maximum strength now? I will be heading home from work in a couple of hours and will wet it down and cover with a sheet of poly.