Stone Shims


Bucket of Rocks

In cutting the sills for the doorways of our on-farm butcher shop our son Ben generated a lot of small, and large, slivers of stone. These are eminently useful in the work I’m doing right now of setting the screed line boards for the final hard floor pour of the admin section.
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All these floors have to precisely slope to the drains so we won’t have any puddling. To achieve that I have placed a set of inch and a half line boards around the perimeters of the rooms and then more line boards from the perimeter to the drains where there are long distances. This will make it easier to get the 1/4″ slope per foot.

The stone shims are handy because they come in a variety of sizes I can stack under the boards to set the heights very precisely. Thus the bucket of rocks.

This photo was taken out near Ben’s stone cutting work bench. It is surrounded by chips of stone and looks like a convention of knappers has been through. It is fun to imagine what some future archeologists will make of such a stone age industrial site.

Outdoors: 41°F/21°F Sunny
Tiny Cottage: 60°F/57°F

Daily Spark: You can’t kill all your enemies but you can teach them to be good.

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About Walter Jeffries

Tinker, Tailor...
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2 Responses to Stone Shims

  1. skeptic7 says:

    In this context, what is a line board? Do you have to use a special type of concrete for the finish floor? Do you have to paint or seal it afterwards.
    Congratulations on nearly finishing the admin section! Since this is inside will there be any problems getting the moisture out of the building as the concrete cures?

    • The line boards are long pieces of wood we cut from 2×4’s and 2×6’s to set the slopes in the rooms before pouring the last bit of concrete. I then roll a piece of pipe, a screed, along the boards and float to the boards to make all the floors slope to the drains in each room. Standing puddles of water are verboten. I aim for 1/4″ per linear foot of slope on the floors. In some high water areas I do more than that. In the office I did 1/8″ as that is a dry area.

      The final coat of concrete is a 5,000 psi small aggregate concrete we mix up ourselves. We do the mixing in the same Husky Mortar Mixers we used to build our cottage. They’re still running strong after seven years and many tons of concrete and mortar. Yesterday I finished floating the floor of the initial meat cutting room. I did the office earlier. This morning I did the bathroom. After doing the floors I’ll do the curbing around the edges of the rooms. I’ve already done that for the office, mech room and laundry room.

      Once the floors have cured for a month I’ll apply a coat of polyurethane sealant and then three coats of polyurea to build up a seamless surface coating that goes all the way around the room, floor to ceiling. This will protect the concrete and steel from the acids (lactic acid, citric acid, acetic acid e.g., vinegar) we use in cleaning and it will make it so there is no safe harbor for bacteria to grow as well as making the surfaces easy to clean and sanitize.

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