PREPARING THE SHOP FLOOR FOR CONCRETE - STEP 1 (DRAIN & INSULATION)
With the electric rough-in for the loft almost complete, it was time to start getting the shop floor prepared for an early Spring pour. I can't tell you how anxious I was to get a solid floor in the shop after dealing with the sand for most of the winter.
The concrete crew came out and did the initial sloping work as well as setting the trench drain in place. Then we had the 6mil vapor barrier put down followed by 2" foam insulation. Unfortunately, some of the material had to come back up in order to have the plumber complete the drain tie-ins. The floor drain will tie in with the downspouts and then empty out to daylight in the back of the building.
Once the drain was put in place, we leveled everything again, replaced the vapor barrier and foam board, then laid out the 6x6 wire mesh sheets that will hold down the radiant tubes as well as give some extra strength to the concrete.
We plan on pouring a 5" thick slab of #4000 concrete mix. I also dug out an additional 2" for 3' diameter sections to support an eventual 2 post lift. I know the manufacturers claim a 4" slab is good enough, but 7" should be better!!
We tied in 3 different drain ports across the 10 4' sections of trench drain
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The drains were set at the 10', 20' and 30' marks for even drainage across the 40' trench drain.
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Drains are in and sand is leveled off
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I duct taped the drain covers on the curved side which will be the bottom in the final install with the flat side of the drain cover facing up.
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